Wheelie Willy's Templeton Cycle Passion

The Dirt on DOT Brake Fluid vs. Mineral Oil, Compatibility, and Specs

2016-10-29T23:39:00.002-07:00

Great article clearing up a lot of disc brake fluid questions.
http://www.epicbleedsolutions.com/blog/dot-brake-fluid-vs-mineral-oil/

DOT Brake Fluid vs. Mineral Oil - and the Winner is..

Posted by Alex Mansell

Brake fluid is an essential part of the hydraulic braking system. Without it, or without enough if it, the forces you apply at the brake lever would not be transferred to the calliper, pads and rotor.

One of the great debates and areas of confusion surrounding brake fluid is which brake fluid is superior?
Most of you will know that hydraulic brakes are designed to use one of two main types of brake fluid - DOT fluid or Mineral Oil, and which one you pick is not a choice made by you or me, but rather by the brake manufacturers themselves. But which brake fluid is best and why do we have two to begin with?
Well we're going to try and answer those questions today. I'll explore these brake fluids in detail, sum up their advantages and disadvantages and explain why the experts believe their choice of fluid is best for us riders. Let's get started..

The Role of the Brake Fluid

If you've read How hydraulic Brakes Work you will know that brakes slow us down by turning kinetic energy into heat by using friction.
Brake fluid is only one of several vital components which enable hydraulic brake systems to work effectively. Its job is to transfer the input forces you create at the master cylinder (lever) to the calliper pistons. This is possible as fluids are generally incompressible.
The brake fluid also has to resist, as far as possible, the high temperatures created by the braking forces.

Types of Brake Fluid

There are two types of brake fluid used in hydraulic mountain bike brakes today:

DOT Fluid
Mineral Oil

DOT Fluid

Certainly the most commonly used brake fluid in use today, due to its wide use in the automotive industry, is DOT fluid. All DOT fluids (with the exception of DOT 5) are made up of a poly-glycol base.
Glycol-based fluids consist of a mixture of ingredients with as many as ten separate substances making up the final product. These substances can be broken down into four key components:

A lubricant, such as polythene or polypropylene, to keep parts moving freely - 20-40%.
A solvent diluent, usually glycol ether, which determines the fluid's boiling point and viscosity and accounts for 50-80% of the fluid.
A modifier-coupler, which changes the amount of swelling of exposed rubber parts.
Inhibitors, to prevent corrosion and oxidisation.

DOT brake fluid is required to meet strict standards and specifications set out by the Society of Automotive Engineers and the Department of Transportation (DOT) - hence the name. These standards centre around maintaining brake fluid performance in a range of temperatures (high and low) and also specify the minimum boiling temperatures which the fluid manufacturers must adhere to.

Boiling Temperatures

One of the main differences separating the various classes of DOT fluid is their boiling temperature (or boiling point). This refers to the temperature where the brake fluid will start to boil or vapourise inside the brake system. This is caused by the intense heat created after prolonged, heavy brake use and has an adverse effect on the performance of the entire brake system.

What happens when brake fluid starts to boil?

When brake fluid absorbs enough heat it boils and vapourises. It turns from a fluid into a gas. This gas can lead to complete brake failure in hydraulic systems. Suddenly the incompressible nature of the brake fluid, which produces the firm lever feel that we know and trust, has disappeared due to the introduction of compressible gasses in the brake system.
Now all of the input forces normally created by squeezing the brake lever are lost as they go into compressing the air bubbles within the fluid instead. Now the brake fluid can no longer transfer these forces to the calliper leading to brake failure - this is known as 'fluid fade'.
Let's take a look at the minimum boiling temperatures of DOT brake fluid as specified by the regulatory bodies.

Note that these are the minimum boiling temperatures as outlined by the Department of Transportation and do no always reflect the true boiling points of the different brands of DOT fluid on the market today. Fluid manufacturers can and do improve on these temperatures with some brake fluids reaching dry boiling temperatures well in excess of 300°C/572°F.

What is meant by dry and wet boiling points?

The Dry Boiling Point of brake fluid refers to the boiling temperature of fresh, new brake fluid from an unopened container. Whereas the Wet Boiling Point is defined as the temperature DOT brake fluid will begin to boil after it has absorbed 3.7% water by volume. DOT brake fluid will reach this level of water volume after roughly 2 years of service, which is why it is advisable to renew your brake fluid every year.
The effects of this water content over time are better illustrated by the graph below. This graph is taken from Shell and gives an overview of the declining effect water content has on its range of DOT 3 and DOT 4 brake fluids.

Let's remember that the Department of Transportation specify the minimum wet boiling point of DOT brake fluids after absorbing only 3.7% water content (roughly 2 years service). In the graph above we can see that the boiling points of the various Shell DOT fluids decline much further over longer periods of time. When brake fluid reaches 8% water content the boiling point of Shell DOT 3 brake fluid has been reduced almost to that of water - 100°C!

So where does this water come from?

Glycol based fluids are hygroscopic which means they absorb water/moisture from the environment at normal atmospheric pressures at a rate of 2-3% per year. This process is exasperated in more humid conditions and climates.
This water content finds it's way into the brake fluid via microscopic pores in brake hoses, seals, joints and seams. As we've learnt, water mixed with DOT fluid has an adverse effect on the brake fluid by reducing it's boiling temperature and therefore reducing it's performance.

Hell no H2O!

Hold on a second, although we've just made water out to look like your new worst enemy, the hygroscopic nature of DOT brake fluid is actually an advantage in a major way.
As water enters the system, instead of pooling in low spots (such as the calliper), due to it's weight in comparison with brake fluid, it is dispersed throughout the whole of the brake fluid. This helps to keep the boiling point of the entire brake fluid high rather than having pools of water in the system which will boil much sooner than the rest of the brake fluid.
It also prevents localised corrosion of internal parts which can be caused by water pooling in the brake system.

So what about DOT 5 brake fluid?

DOT 5 brake fluid (not to be confused with DOT 5.1) is fundamentally different than the rest of the DOT fluid range in that it is silicone based brake fluid.
It was originally introduced to give a higher boiling temperature over glycol-based DOT 4 brake fluid. Purple in colour and sometimes referred to as 'synthetic brake fluid', DOT 5 is not compatible with any of the glycol-ether based DOT fluids that we've been focusing our attention on so far.
Although tests have been carried out by the various hydraulic mountain bike brake manufacturers, DOT 5 has so far not proven itself to be a better alternative to glycol-ether based fluids used in hydraulic mountain bike brakes today.
It is also more compressible than the other DOT brake fluids which can lead to a sluggish or spongy brake lever (or pedal) feel, and therefore requires special design considerations when used in brake systems.
Furthermore DOT 5 is hydrophobic and does not absorb water from the atmosphere like regular DOT brake fluid will.

So what is it good for?

Due to its hydrophobic properties it has a very long life-span meaning low maintenance and fewer fluid changes. It is also kinder to paintwork unlike corrosive glycol-ether based DOT fluids.
A good example of its use is in military vehicles which can be stored for long periods of time but need to be ready to be used at a moments notice. It is also favoured by some owners of classic cars for vehicles which may also rarely be used on the roads.

Mineral Oil

Unlike DOT brake fluid, Mineral Oil brake fluids are not governed by any standards or regulatory body, therefore the technical information on the various substances that contribute to their make-up is usually hard to come by. The likes of Shimano and Magura have no doubt spent a lot of time and money refining their proprietary Mineral Oil brake fluids so you can understand why there is a degree of secrecy on the subject.
But is the lack of a governing 'rule book' for Mineral Oil bad thing? Here's what Shimano have to say:

"We actually see this as a major advantage of using Mineral Oil. We don't have to trust anyone else's testing standards for the fluid they make. Since every Shimano brake uses Shimano brake fluid, we have complete control over the process and can assure consistent performance."
- Nick Murdick, Lead Multi Service Technician - Shimano

It's a convincing argument. It's easy to understand why a huge organisation like Shimano, with their kind of budget, would want complete control over the production of their brake fluid.

Mineral Oil Boiling Temperatures

Ok, so now we're getting down to the nitty gritty, this is where Mineral Oil differs greatly from DOT brake fluid.
Unlike DOT fluid, Mineral Oil is hydrophobic and does not absorb moisture from the environment. This means that there are no wet or dry boiling temperatures to worry about, the boiling point stays constant and never drops. That's the good news.
The bad news is that any water that does enter the brake system, via seals or microscopic pores in the lines etc., will effectively reduce the boiling point of the whole brake system to that of water - just 100°C. This is because as the fluid repels any water ingress, it causes it to pool at low points within the brake system, usually the calliper, since water is heavier than brake fluid it will settle at the lowest point. This is worrying because the fluid in the calliper is more susceptible to high temperatures as it's at the business end of the brake, where the friction is created.
You might think that since the boiling point of Mineral Oil never drops then the trade-off must be that it must start much lower than DOT fluid, after all you can't have the best of both worlds can you? Well recent discoveries suggest that might not be the case. Let's take a look at some of the figures we know of.

Yes, we were surprised too! Magura Royal Blood Mineral Oil has a ridiculously low boiling temperature when compared with it's rivals in the industry. Even LHM+ outweighs Royal Blood with a fluid that has a 107% higher boiling temperature. The reasons behind this low temperature is unknown, all we know is that Magura Royal Blood is based on Castrol Vitamol V10 hydraulic fluid.
All of these figures have been provided by the manufacturers themselves. The second surprise here is the fact that Juice Lubes' Mineral Oil appears to out-perform even Shimano's own Mineral Oil, albeit by a very small margin, but a victory nonetheless. :)

Brake Fluid Shelf Life

DOT Brake Fluid

The shelf life of glycol-based DOT brake fluid is very poor due to its hygroscopic properties, which is why every bottle should come with an air tight foil liner covering the opening. As soon as this air tight seal is broken it will start absorbing moisture from the environment and the boiling point will begin to drop.
Castrol recommends that DOT fluid in previously opened containers should be discarded after 12 months. In our opinion it would be unwise to use DOT fluid from a bottle which has been open for more than a few months, unless you have no other alternative.
To reduce large quantities of wasted brake fluid, use DOT fluid from smaller 100ml bottles. 100ml is enough to bleed a set of brakes (front and rear) 2-3 times.

Mineral Oil

Since Mineral Oil is hydrophobic and does not absorb water from it's environment, one of the great advantages it has over DOT fluid is that once opened it can be stored indefinitely.

Compatibility Between Brake Fluids

So just which brake fluids can you mix without causing harm to your brake system? Let's take a look at the chart below.

As you can see all of the glycol- based DOT fluids (3, 4 & 5.1) are fully compatible with each other and can be readily mixed or swapped without adversely affecting the brake's performance or it's characteristics. The main change will come in a decrease or increase in the boiling point of the brake fluid as a whole.
For example if you introduced DOT 3 into a brake previously filled with DOT 5.1 then you will probably be left with a brake fluid with a lower boiling point. I say 'probably' as it depends on the service life of the older fluid but you get the idea - not a great deal can go wrong mixing glycol-based DOT fluids.
Silicone DOT 5, as we mentioned earlier, is not compatible with any of the other DOT fluids, nor is it able to be mixed with Mineral Oil brake fluid. Since there is no hydraulic mountain bike brakes using DOT 5 fluid we won't worry too much about it. The main thing to remember is it should never be confused with DOT 5.1 as they are fundamentally different brake fluids.

What about compatibility between Mineral Oil brake fluids?

Here's where things get a bit hazy. Unlike DOT fluid which is pretty clear cut, mixing Mineral Oils is an altogether different story.
We at EBS had believed that all Mineral Oils manufactured for use in hydraulic brakes (not the stuff you can buy from the local pharmacy or drug store) are compatible with each other, but our earlier thoughts were questioned after reading a very informative Q&A session conducted by the good folks at Bike Rumor recently.
7 questions regarding brake fluid and its implications for use with hydraulic road disc brakes were directed at the top brake manufacturers and the unedited replies were published.
One Shimano representative revealed that no third party Mineral Oil has ever been sanctioned for use in Shimano brakes - this we expected to hear as Shimano will of course be recommending you use their proprietary brake fluid. However he went on to state, with 'absolute certainty', that 'Magura fluid will destroy Shimano brakes in a very short amount of time.'
This got us thinking. Are Shimano simply trying to put the frighteners on people so they use nothing but Shimano's own branded Mineral Oil? We contacted Will Miles of Juice Lubes, who manufacture a range of lubricants, cleaners and brake fluids (including Mineral Oil), to get their take on this and here's what they said when it comes to compatibility between Mineral Oils:

"Our view is quite simple in that having tested our Mineral and DOT oil in all Mineral and DOT systems we are happy to recommend it for any brand of brake manufacturer including Shimano. We have sold thousands and thousands of units worldwide and never had any problems reported.
Clearly the manufacturers have a vested interest in recommending and insisting that consumers use only there oil and to be fair why wouldn't they? It does make perfect commercial sense and does allow them to maintain quality control standards so I can completely understand there point of view and stance on the matter.
As Juice Lubes is a non-OE supplier, all we can do is test our products, ensure they are of the highest grade and work as intended - which is exactly what we do."
- Will Miles, Juice Lubes

Thanks Will. After thousands of units sold and no problems reported perhaps Shimano could be accused of exaggerating slightly - but that's just my view. In any case, one thing to remember at all times when considering swapping out your Shimano or Magura proprietary Mineral Oil is that you may void the brake's warranty in the process. You've been warned.

Which Brake uses which Brake Fluid?

So which brake fluid should you be using with your brake set? Well that of course depends on your brake model. You will usually find the type of fluid your brake was designed to use printed somewhere on the lever assembly or reservoir top cap. This makes it easy to identify and saves you from making the fatal mistake of introducing the wrong fluid and destroying your brake's internal seals.

But while we're on the subject let's take a look at which way the various brake manufacturers lean when it comes to brake fluid choice. Take a look at the table below.

From that picture it's clear to see that DOT fluid is used by the vast majority of hydraulic brake manufacturers on the bike scene, however does that necessarily mean it's the best choice for users? Let's zoom out a little and take a look at the strengths and weaknesses of each fluid.

Advantages and Disadvantages

So here it is. This is where I'm going to give you an overview of the advantages and disadvantages of each brake fluid as I see them. Let's start with DOT fluid and remember that the points below apply to glycol-based DOT fluids only, we're excluding silicone DOT 5 as it is not used in any hydraulic cycle brakes that we know to.

As you can see, there are a lot of positive points about DOT brake fluid, not least the fact that it can be found pretty much anywhere at less than half the price of Mineral Oil. There's good news and bad news when it comes to it's water-absorbing properties, that is why you'll find I have entered it in both tables to show both sides of the story.
On this particular point I personally feel that the benefits massively outweigh the drawbacks. Changing your brake fluid annually to conquer the drop in boiling point is a small price to pay to avoid having water pooling in your brake system.
Also the fact that it is regulated by the federal government means that the brake manufacturers can concentrate on building brakes instead of formulating brake fluid, and be safe in the knowledge that the DOT fluid they're designed to be used with is of consistnt high quality regardless of who should manufacture it.

A huge disadvantage of Mineral Oil, or proprietary brake fluid, is the cost. As it is one-of-a-kind, there's no competition (as such) and the warranty says you should use it, they can basically charge what they like for it - and they do. Not cool!
In contrast to DOT brake fluid, Mineral Oil is not a regulated fluid. This means that the likes of Shimano and Magura have the added freedom when it comes to it's manufacture. Shimano certainly see this as an advantage as they 'don't have to trust anyone else's testing standards' and can pretty much guarantee the results. A sceptic would also point out that they can also make money off the back of fluid sales as an extra revenue stream.
Another great thing about Mineral Oil is that it does not destroy your paintwork, something which is very important as bikes and bike gear gets shinier by the week. Don't blemish that bling now! :)

And the Winner is..

So there it is. A break down of the two brake fluids in use in hydraulic mountain bike brakes today. Both very different in their make-up, and with their own set of characteristics but ultimately performing the same role. By now you will appreciate that there is more to the great brake fluid debate than simply discussing boiling temperatures.
Which ultimately leaves only one question - which one is best?
Well, why don't you tell us? You've heard the evidence, now it's time to choose your overall winner using the poll and telling us why in the comments below.

Which brake fluid is best?

DOT FluidMineral Oil

VoteView Results Polldaddy.com

P.S. I wrote this article to be shared. Please hit the social buttons and Like, Tweet or +1 this article to get that warm and fuzzy feeling inside. Thank you.

Sources:

Bike Rumor - Tech Speak: Brake Fluid Break Down & Implications for Road Disc
Castrol - Product Data Sheet: Super Response DOT 4
Valvoline - LHM Plus product information and data sheet
Society of Automotive Engineers International - Standard J1703: Motor Vehicle Brake Fluid
Code of Federal Regulations - Standard No. 116; Motor vehicle brake fluids

Image credits: Shell, Tord Mattsson

Breaking Away Star Meet and Greet and Film Showing Happening Oct.25th 5pm in San Luis Obispo at Mama's Meatball and Freemont Theater

2014-10-20T10:26:00.003-07:00

http://slofilmfest.org/2014/09/23/dont-miss-the-35th-anniversary-of-breaking-away/

Don’t miss the 35th Anniversary of “Breaking Away”

Posted on September 23, 2014 by San Luis Obispo International Film Festival

In honor of the San Luis Obispo International Film Festival’s 21^st birthday next year, the SLOIFF will celebrate early by screening three classic movies with a “coming of age” theme this fall, with special events that include Hollywood celebrities and musical guests.
Sponsored by MidAmerican Solar, proud owner of Topaz Solar Farms, the series will begin in September and run through November, and is a fundraiser for the 2015 Festival which is scheduled for March 10^th to 15^th.
The series is also generously sponsored by Q104.5, New Times, Sands Inn & Suites and Enterprise Rent-A-Car.
On Saturday, October 25, the 1979 comedy, BREAKING AWAY will screen at the Fremont Theatre at 7:00pm, with the film’s stars Dennis Christopher and Paul Dooley in attendance. Dennis Christopher was also the star of CALIFORNIA DREAMING (screened in Avila Beach last summer), as well as having featured roles in CHARIOTS OF FIRE and the Oscar-winning, DJANGO UNCHAINED. Paul Dooley, who plays the befuddled and hilarious father in BREAKING AWAY, is a character actor also known for SIXTEEN CANDLES, CARS and as the guest star of many TV shows.
This film event is generously sponsored by Best Bike Zone, Flanders Bicycle, Paso Bike Tours, Foothill Cyclery, Mama’s Meatball and Peloton Cellars! Partial proceeds will go to support the SLO County Bicycle Coalition whose mission is to improve the quality of life in SLO County
through bicycle advocacy, education and inspiration.
The critically acclaimed BREAKING AWAY, directed by Peter Yates, won an Oscar in 1980 for Best Screenplay and a Golden Globe for Best Motion Picture Comedy. Dennis Christopher was nominated for several major awards that year, winning the BAFTA award for Most Promising Newcomer in a Leading Film Role, as well as the Young Artist Award for Best Juvenile Actor.
Christopher plays a small-town boy in the Midwest who is obsessed with the Italian bicycling team. His buddies, played by young Dennis Quaid, Daniel Stern and Jackie Earle Haley, don’t understand him and his father (Paul Dooley) thinks he’s out of his mind, but somehow his enthusiasm winds up inspiring not only his friends, but his entire town. The film celebrates its 35^th anniversary this year and is a timeless classic that ranks high on many lists. It’s #8 on AFI’s 100 Most Inspiring Movies of All Time and #8 on Sports Illustrated list of Top 50 Best Sports Movies.
Dennis Christopher and Paul Dooley will do a Q&A after the movie and will also be at a meet-and-greet reception at Mama’s Meatball in San Luis Obispo, happening 5:00-6:30pm. The reception includes classic Italian appetizers, wine courtesy of Peloton Cellars, and of course, some Cinzano! Tickets for the reception AND movie are $30/person. Individual reception tickets are $20. Tickets for the film are $12 (general), $10 (students) in advance, $15/$13 at the box office day of show. To purchase tickets now, click here.
Stay tuned for more details about our last movie night of this series, DADDY LONG LEGS with the Malibu Silent Film Orchestra on November 22!

Come Ride the Public Multi-Rider Level Freeride Trails Built By FASTA Association in San Luis Obispo

2014-10-20T10:07:00.000-07:00

http://www.gofasta.org/

About

FASTA:
Freeride and Sustainable Trails Association

The working members of FASTA bring to every project a combination of environmental knowledge, a passion for developing technical mountain biking skills, and a desire to create safe, fun, and sustainable mountain biking technical skill areas and trails in the San Luis Obispo area.

FASTA members apply sound planning and design concepts to engineer projects that succeed for all stakeholders—from riders to city officials. FASTA is committed to developing trails and mountain biking technical skills areas that accommodate a wide array of users. Working FASTA members plan and design trails and skills areas with a systematic approach that enhances the rider’s experience. We also analyze the landscape to support decisions that may influence or be influenced by the variation and specifics of topography, hydrology, vegetation, and soils.
Founded in 2008 by Andrew Pellkofer and Dan Palmer, FASTA members dedicate themselves toward four primary goals:

To create sustainable trails and mountain biking technical skills areas
To provide new recreational opportunities for all levels of mountain bikers
To reduce environmental damage caused by illegal and poorly designed trails
To assist local land managers and clubs with trail design, construction, and maintenance

FASTA members develop practical skills scouting, flagging, and laying out of trails and skills areas. We construct technical elements, maintain them and, of course, ride them.

http://www.gofasta.org/trail-map/

Recent Blog Posts

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Overall it was an awesome day today! We were able to get a line on a mini excavator to... →
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I Love Southpaw Sign Company! Signs Up at New Main St. Retail Location

2014-07-25T13:24:00.000-07:00

Check out the A-W-E-S-O-M-E signs Sean owner of Southpaw Sign Co. made and just installed at our new 212 S. Main St. Unit 106 location. I'm grinning from ear to ear =]; {) Let me know if I can give your bike a thorough inspection and assessment at no charge. 805 801 3614 cell, 434 9560 shop, wheeliewillys@att.net

CPSC Recall: 2014 GT Fury Expert and 2014 GT Fury Team downhill mountain bicycles

2014-07-18T12:31:00.001-07:00

Read full article at CPSC link below:

http://www.cpsc.gov/en/Recalls/2014/Cycling-Sports-Group-Recalls-GT-Brand-Mountain-Bicycles/

Cycling Sports Group Recalls GT Brand Mountain Bicycles Due to Crash, Injury Hazards

Consumers should stop using this product unless otherwise instructed. It is illegal to resell or attempt to resell a recalled consumer product.

Recall date: July 17, 2014

Recall number: 14-234

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Enlarge

1 of 2 photos
2014 GT Fury Expert downhill mountain bicycle

Download

Recall Summary

Name of product: GT downhill mountain bicycles
Hazard:

The wheel hubs can break and cause the brake system to fail, posing crash and injury hazards to the consumer.

Remedy:

View Details

Repair

Consumer Contact: Cycling Sports Group at (800) 726-2453 from 9 a.m. to 6 p.m. ET Monday through Friday, email custserve@cyclingsportsgroup.com, or online at www.gtbicycles.com and click on Recalls under Recalls & Safety at the bottom of the page.
Report an Incident Involving this Product

Recall Details

In conjunction with

Units

About 120 in the U.S. and 32 in Canada

Description

This recall involves all 2014 GT Fury Expert and 2014 GT Fury Team downhill mountain bicycles. The recalled Fury Expert model is blue with red and white accents. The recalled Fury Team model is black with lime green and blue accents. The bicycles have front and rear disc brakes, rear shock absorbers and front suspension forks. "Fury" is printed on the top tube and the bottom of the chainstay, the GT logo is on the down tube and the top of the chainstay. The model names are printed in small letters on the top tube of the bicycles just above the word Fury.

Incidents/Injuries

Cycling Sports Group has received five reports of broken hubs. No injuries have been reported.

Remedy

Consumers should immediately stop using the bicycles and return them to the nearest authorized GT dealer to have the complete front and rear wheels replaced free of charge.

Sold at

Authorized GT dealers from February 2014 to June 2014 for between $4,300 and $6,000.

Importer

Cycling Sports Group Inc., of Wilton, Conn.

Manufactured in

Taiwan

The U.S. Consumer Product Safety Commission is charged with protecting the public from unreasonable risks of injury or death associated with the use of thousands of types of consumer products under the agency’s jurisdiction. Deaths, injuries, and property damage from consumer product incidents cost the nation more than $1 trillion annually. CPSC is committed to protecting consumers and families from products that pose a fire, electrical, chemical or mechanical hazard. CPSC's work to help ensure the safety of consumer products - such as toys, cribs, power tools, cigarette lighters and household chemicals -– contributed to a decline in the rate of deaths and injuries associated with consumer products over the past 40 years.
Federal law bars any person from selling products subject to a publicly-announced voluntary recall by a manufacturer or a mandatory recall ordered by the Commission.
To report a dangerous product or a product-related injury go online to www.SaferProducts.gov or call CPSC's Hotline at (800) 638-2772 or teletypewriter at (301) 595-7054 for the hearing impaired. Consumers can obtain news release and recall information at www.cpsc.gov, on Twitter @USCPSC or by subscribing to CPSC's free e-mail newsletters.

CPSC Recall: Scott, Trek Recall Sportster, 8.3, 8.4, 8.5, 8.6, Cali, Marlin, Montare, Neko, Utopia, and Wahoo Bicycles with SR Suntour Front Forks Due to Crash Hazard

2014-06-25T23:12:00.001-07:00

Click link below for full artice at CPSC site:

http://www.cpsc.gov/en/Recalls/2014/Scott-Trek-Recall-Bicycles-with-SR-Suntour-Front-Forks/

15 more photos at http://www.cpsc.gov/Global/Images/Recall/2014/14215/1-14xxx_2011ScottSportster10Men_LARGE.jpg

Recall Details

Units

About 5,200 forks on Scott bicycles and about 120,000 forks on Trek bicycles

Description

This recall involves SR Suntour front forks on 13 models of Scott and 11 models of Trek 2011, 2012 and 2013 bicycles.

Recalled Scott bicycles have 700c wheels, disc brakes and one of the following Suntour front fork models: NEX or NCX. Bicycle model names and numbers are on the main frame of each bicycle in a location that varies by model. The model year can be identified by the color scheme of the bicycle frame. The fork’s model name is printed on the outer sides of the fork.

The following Scott bicycles with Suntour forks are being recalled:

Model Name(s)	Model Year(s) and Color	SR Suntour Fork
Sportster 10 Men	2011 (black/white/gold)	NCX
Sportster 10 Solution	2011 (black/white/gold)	NCX
Sportster 25 Men	2011 (white/brown/black)	NCX
Sportster 25 Solution	2011 (white/red/orange)	NCX
Sportster 30 Men	2011 (grey/white) 2012 (white/black/grey/gold)	NEX
Sportster 30 Solution	2011 (black/white/grey)	NEX
Sportster 55 Lady	2011 (black/white/gold) 2012 (white/purple)	NEX
Sportster 55 Men	2011 (black/white/orange)	NEX
Sportster X30 Men	2013 (black/white/grey/red)	NEX
Sportster X30 Solution	2013 (black/blue/grey)	NEX
Sportster X40 Men	2013 (black/white/blue)	NEX
Sportster X50 Men	2013 (grey/white/black)	NEX
Sportster X50 Lady	2013 (white/grey)	NEX

Recalled Trek bicycles have disc brakes and one of the following Suntour front fork models: NEX, NRX (with IS mounts), XCM (on bicycles with 29-inch wheels) or XCT (on bicycles with 29-inch wheels). Bicycle model names and numbers are on the top tube near the seat tube or near the head tube. Bicycles with a serial number ending in F, G or H should be taken to the dealer for inspection. The serial number is on the frame of the bicycle under the bottom bracket. The fork’s model name is printed on the outer sides of the fork.

The following Trek bicycles with Suntour forks are being recalled:

Model Name(s)	Model Year(s)	SR Suntour Fork
8.3 DS	2012 and 2013	NEX
8.4 DS	2012 and 2013	NRX
8.5 DS	2012 and 2013	NRX
8.6 DS	2013	NRX
Cali	2013	XCM
Marlin and Marlin SS	2011	XCT
Marlin	2012 and 2013	XCM
Marlin SS	2012	XCM
Montare	2011	NRX
Neko SL	2012 and 2013	NRX
Utopia	2011	NRX
Wahoo	2011	XCM
Wahoo	2012 and 2013	XCT

Incidents/Injuries

Scott has received one report of a broken SR Suntour fork. No injuries were reported. Trek has received 28 reports of broken forks. Five injuries have been reported, including minor bruises, a separated shoulder and broken bones.

Remedy

Consumers should immediately stop using the recalled bicycles. Consumers with recalled Scott bicycles should take them to an authorized Scott dealer for a free repair of the NEX model or a free replacement lower fork for the NCX model. Consumers with recalled Trek bicycles should take them to an authorized Trek dealer for a free repair of NEX, XCM and XCT models or a free replacement of the NRX model.

Sold at

Bicycle stores nationwide from October 2010 to November 2013 for between $450 and $1,100 for Scott bicycles and from May 2010 to June 2014 for between $600 and $1,370 for Trek bicycles.

Importer

Scott USA Inc. of Ketchum, Idaho and Trek Bicycle Corp., of Waterloo, Wis.

Manufactured in

China and Taiwan

CPSC Recall: Tern Stile: Link Uno, Link D7i, Link D8, Link P9, Link P7i, and Link P24h

2014-06-24T22:03:00.001-07:00

Click link below for full article:

http://www.cpsc.gov/en/Recalls/2014/Stile-Products-Recalls-Tern-Folding-Bicycles/

Description

The recall involves Link Uno, Link D7i, Link D8,
Link P9, Link P7i, and Link P24h models of Tern brand adult folding
bikes. These six models were sold in black/blue, black/green,
black/grey, black/red dark grey/light grey, grey/orange and white/pink
color combinations. “Tern” is printed on the front end of the top tube
and on other portions of the frame. The model name is printed on the
middle of the top tube. Recalled bicycles have a 10-character
alphanumeric serial number that begin with either AI1133 through AI1137
or AI1151 through AI1213 stamped on the bottom bracket shell of the
bike. An alphanumeric service tag number is located on the front of the
seat tube and this number can be used to determine if the bicycle is
affected by going to the firm’s website.

Incidents/Injuries

No incidents or injuries reported in the U.S. The
firm has received 11 reports of the bicycle frames cracking including
five reports of minor scrapes and bruises from outside of the U.S.

Remedy

Consumers
should immediately stop using the bicycles and contact Stile Products
or take the bike to an authorized dealer. Consumers will receive a free
replacement frame and have it installed at no cost or they can upgrade
their bike to one of three designated models at an additional cost.

Sold exclusively at

Authorized Stile/Tern dealers nationwide from November 2011 to April 2014 for between $600 and $1250.

Distributor

Stile Products Inc., of Lakewood, Calif.

Manufacturer

Taicang A&I Medical Appliances Co., of Jiangsu, China

Manufactured in

China

CPSC Recall: 2014 SCOTT® Speedster 30 and 40, and Contessa Speedster 25 and 35 road bicycles

2014-06-10T22:03:00.001-07:00

Click link below for full article:

http://www.cpsc.gov/en/Recalls/2014/SCOTT-Recalls-Speedster-Bicycles/

Recall Details

Units

About 2,000 in the United States

Description

This
recall involves model year 2014 SCOTT men’s and women’s road bicycles,
models Speedster 30, Speedster 40, Contessa Speedster 25 and Contessa
Speedster 35. The bikes have the brand name “SCOTT” and the model name
“Speedster” on the frame. They were sold in black and white with blue,
green, purple or teal accents. The following serial number ranges are
included in the recall: AS30500001–AS30504930, AS30700001–AS30704651,
AS30900001–AS30903278, AS31100001–AS31103744 and AS40101604–AS40105463.
The serial number is printed on a white sticker and embossed on the
underside of the bicycle frame near the pedals.

Incidents/Injuries

Scott USA has received one report of a fork breaking. No injuries have been reported.

Remedy

Consumers
should immediately stop riding the bicycle and take it to an authorized
SCOTT dealer. Consumers with a recalled bicycle will receive a free
replacement fork and have it installed at no cost.

Sold at

Authorized SCOTT dealers nationwide at retail and online from about August 2013 through May 2014 for between $1,000 and $1,300.

Manufacturer

Scott USA Inc. of Ketchum, Idaho

Manufactured in

Cambodia

The U.S. Consumer Product Safety Commission is charged with
protecting the public from unreasonable risks of injury or death
associated with the use of
thousands of types of consumer products under the agency’s
jurisdiction. Deaths, injuries, and property damage from consumer
product incidents cost the
nation more than $1 trillion annually. CPSC is committed to
protecting consumers and families from products that pose a fire,
electrical, chemical or
mechanical hazard. CPSC's work to help ensure the safety of
consumer products - such as toys, cribs, power tools, cigarette lighters
and household
chemicals -– contributed to a decline in the rate of deaths
and injuries associated with consumer products over the past 40 years.

Federal law bars any person from selling products subject to a
publicly-announced voluntary recall by a manufacturer or a mandatory
recall ordered by the
Commission.

To report a dangerous product or a product-related injury go online to www.SaferProducts.gov
or call CPSC's Hotline at (800) 638-2772 or teletypewriter at
(301) 595-7054 for the hearing impaired. Consumers can obtain
news release and recall information at www.cpsc.gov, on Twitter @USCPSC or by subscribing
to CPSC's free e-mail newsletters.

CPSC Recall: BMC Alpenchallenge, Masschallenge and Urbanchallenge Bicycles with Aprebic Forks

2014-05-16T00:44:00.001-07:00

http://www.cpsc.gov/en/Recalls/2014/BMC-Recalls-Three-Models-of-Bicycles/

(Read full article at link above)

Recall Summary

Name of product:

BMC Alpenchallenge, Masschallenge and Urbanchallenge Bicycles with Aprebic Forks

Hazard:

The bicycle forks can crack or break above the brake mount posing a fall hazard to consumers.

Remedy:

View Details

Replace

Consumer Contact:

BMC at (800) 819-4262 from 9 a.m. to 5 p.m. ET Monday through Friday or online at www.bmc-racing.com and click on “Service” then click on the “Recall page” link or email at infousa@bmc-switzerland.com for more information.

Report an Incident Involving this Product

Recall Details

Units

About 160

Description

The
recall involves certain models of Alpenchallenge, Urbanchallenge and
Masschallenge bicycles equipped with full carbon Aprebic bike forks
model ACC-A704DN50B. The fork model number is printed behind the top
arch. Specific bicycle models included in the recall are Alpenchallenge
AC01 105 Tiagra, Alpenchallenge AC01 Rival, Masschallenge MC01 Team and
the Urbanchallenge UC01 Alfine 11. Both the Alpenchallenge and
Urbanchallenge bicycles include the 2012 and 2013 model years. The
Masschallenge bicycle includes model year 2012. The model year is
printed on the top tube of the bike. The bicycles come in black and
yellow, or black and red color combinations.

Incidents/Injuries

None reported.

Remedy

Consumers
should immediately stop using these recalled bicycles immediately and
contact their local BMC authorized dealer for instructions on receiving a
replacement fork.

Sold at

Authorized BMC bicycle dealers nationwide from December 2011 to June 2013 for about $1,000.

Importer

BMC, of San Diego, Calif.

Manufactured in

Taiwan

AMGEN Tour of California Stage 4 to finish in Cambria May 14, 2014

2014-05-08T21:43:00.000-07:00

Full article at link below:

http://www.amgentourofcalifornia.com/host-cities/city-cambria

Route Information: May 14, 2014 - Stage 4 Finish

Cambria

Nestled among towering pines and the shimmering sea on California's Central Coast, Cambria, California is a picturesque village that unfolds along scenic Highway One, halfway between San Francisco and Los Angeles. Just 6 miles south of the world famous Hearst Castle® and at the gateway to Big Sur, you will enjoy this romantic place that is tailor-made for relaxing escapes.
Free of chain stores and brimming with charm, Cambria invites you to exit the beaten path and explore one of California's truly unique Central Coast vacation destinations! Stroll down Main Street and up Burton Drive in the East village, browsing as you go. Travel north/west on Main Street and in about a mile you will find the West end of the village. Both ends of the village are lined with unique shops, art galleries, cafes, restaurants, tasting rooms, and boutiques that make for enjoyable strolling and wonderful shopping.
Moonstone Beach is a great place to view migrating whales, seals sunbathing on the rocks, sea otters, and amazing sunsets. It has it all: crashing waves, surfers, tide pools and driftwood-strewn sand. With a level boardwalk just above the beach and a smooth route down to the sand's edge, it is easily accessible by almost anyone. Cambria is not only one of "America's Prettiest Towns", according to Forbes magazine, it is one of "America's Friendliest Towns" - We look forward to your visit! Cambria has bed and breakfast inns, vacation rentals, motels, and the Moonstone Beach hotels are close enough that you can smell the spray and hear the crashing waves.
"Cambria is delighted to be a Host City for the 2014 Amgen Tour of California. With unparalleled ocean views and pristine coastal scenery, our artist's colony will offer the world's premier cyclists a spectacular welcome. Fans and riders will discover an unforgettable experience at Cambria's finish line and beyond."
- Bram Winter, Cambria Tourism Board

Maps: Ride Your Own Tour of California (Bicycling.com article) AMGEN 2014 May 11th-18th

2014-05-08T21:07:00.000-07:00

Full article with elevations, grades, sights, rest stops, and best spots to watch
Amgen Tour of California riders.

Follow link below for full article:

http://www.bicycling.com/ride-maps/featured-rides/ride-your-own-tour-california

http://www.amgentourofcalifornia.com/

CPSC Recall: Felt Bicycles Recalls S22 S32 B12 B14 B16 Triathlon Bicycles Due to Risk of Injury

2014-04-24T21:14:00.001-07:00

Click link below for full article at CPSC website:

Felt Bicycles Recalls Triathlon Bicycles Due to Risk of Injury | CPSC.gov

Units

About 3,300 (2,100 additional units with the same steer tube were previously recalled in June 2010) in U.S. and about 190 in Canada

Description

This recall includes all 2008 Felt S22 and S32 triathlon bicycles, and 2010 S32, B12, B14 and B16 triathlon bicycles. The bicycles have aluminum frames with carbon fiber forks and aluminum steer tubes. The Felt logo is on the seat, frame and tires. The model number is printed on the frame, next to the Felt logo. The 2008 S22 model was sold in gloss white and the 2008 S32 was sold in gloss red. The 2010 S32 model was sold in gloss black, the 2010 B12 was sold in gloss white, the 2010 B14 was sold in gloss pewter and the 2010 B16 was sold in matte black.

Incidents/Injuries

Felt Bicycles has received 18 reports of the bicycle forks breaking, including five reports of minor injuries.

Remedy

Consumers should immediately stop using the recalled bicycles and contact their local Felt Bicycles dealer for a free inspection and steer tube replacement.

Sold at

Bicycle specialty stores nationwide from October 2007 through February 2014 for between $1,500 and $3,000.

Distributor

Felt Bicycles, of Irvine, Calif.

Manufacturer

ADK Technology Ltd., of China

Manufactured in

China

CPSC Recall: Tektro USA and TRP Recall Spyre and Spyre SLC Mechanical Disc Brake Calipers Due to Crash Hazard

2014-03-06T21:08:00.002-08:00

http://www.cpsc.gov/en/Recalls/2014/Tektro-USA-and-TRP-Recall-Bicycle-Mechanical-Disc-Brake-Calipers/

Click on text link above for full story at cpsc.gov

Nitrogen for Tires-Truth or Hype? The Truths and Myths of Nitrogen

2014-02-15T14:24:00.000-08:00

Great article from Powertank.com
http://powertank.com/truth.or.hype/

The Truths and Myths of nitrogen
Lately there seems to be more and more hype about nitrogen gas for tires offered by tire companies and nitrogen services. Some services will "purge" your tires of air and replace it with near pure nitrogen for $20 per tire. Some tire shops are charging as much as $5 -10 per tire to fill them with nitrogen claiming everything from improved fuel mileage to a more comfortable ride. Is there any truth to this? Here we will take a close look at some facts and let you make up your own mind. At the bottom we show the results of our real-world gas comparison test that you might find interesting. In this article we refer to "gas" which includes air, nitrogen, and CO2.
Claim #1. "N2 doesn't expand with heat like air because it's drier so your tire pressures stay more constant through tire temperature changes." Here's a claim that we've heard more times than we';d like to admit. Bottled nitrogen is dry, drier than typical air, and it is said that a drier gas will exhibit less pressure change to temperature changes. This would mean that as my N2 filled tires heat up, the pressure will not go up as much as if they were filled with air. The dryness of CO2 is also put into question since it is a "liquid" gas under pressure. CO2 vapor is very dry. Don't forget that N2 is also a liquid gas under certain pressure and temperature. The truth is, the differences in thermal expansion values (TEV) between N2, air, and CO2 at automotive tire pressures is virtually undetectable to a driver. In our own tests we compared the pressure changes of N2, air, and CO2 through a wide temperature range and found that they all expanded (increased in pressure) at virtually the same rate (see Gas Test).
Claim #2. "N2 permeates (leaks) through tires slower than air therefore your tires will maintain their pressure longer and require less maintenance."
Although it is true that nitrogen does permeate through tire rubber slower than oxygen and CO2, there are two things to know. First, the gas permeation difference between oxygen, CO2 and nitrogen through a tire wall is very minute. Second, this difference is made even more insignificant for N2 since oxygen only makes up 17% of air and most of "air" (78%) is nitrogen. Diffusion speed through the walls of your tires has more to do with the quality, the wall thickness, and the age of your tires. More often, tire deflation is due to a leak in the stem core, the stem seal, cracks in the stem, a bad tire to wheel bead seal, cracks in the tire wall, or objects like nails stuck through the tire tread. Also, did you know that your tires may grow during the first 1-2 days as it gets used to being inflated which would reduce the tire pressure. Tire manufacturers recommend checking your tire pressures often no matter what type of gas you';re using to fill your tires. Bottom line: If gas permeation was the only way a tire would lose its "air" there would be very little detectable difference between air (which is already 80% nitrogen), nitrogen, and CO2.
Claim #3. "N2 is safer because it is non-combustible and therefore less likely that your tires will catch on fire."
This is true and is one reason aircraft tires are filled with nitrogen. But when was the last time your tires had to skid on pavement from 150 mph carrying 75 tons of vehicle, passenger and cargo weight? The chances are your tire is not going to burst into flames because of the additional 17% oxygen content inside your tires especially since your tires are surrounded by air anyway. If you have ever seen a tire smoking on the freeway chances are the tire was overheating from under-inflation. Putting nitrogen inside your tire will not prevent a tire from overheating. "But didn't I read that nitrogen will make my tires run cooler?" This statement is false. N2 cannot dissipate heat from a tire any faster than air or CO2 nor can it decrease heat producing friction between your tire tread and the road.

Claim #4. "N2 is safer for my tires because air contains oxygen and oxygen corrodes the inside of my tires."
Although it is true that oxygen permeating through the tire';s carcass may cause a certain level of oxidation, tire failures are typically not due to corrosion from the air inside. Don't forget, the outside of a tire is also exposed to oxygen not to mention harmful UV rays and ozone, the occasional curb bump, random road hazards, road salt and even dog urine. In fact, the leading cause of premature tire failure is tread separation caused by overheating; the overheating caused by friction from insufficient tire pressure. Premature tire failure is typically not caused by tire deterioration from the inside. CO2 vapor is dry and inert and also poses no corrosion issues to your tires. There is, however, one other possible cause for corrosion of tires that sit for long periods and that is moisture permeation from the ground. It is recommended that a moisture barrier (plastic sheet) be placed beneath each tire before long term outdoor storing.
Claim #5. "N2 is inert and therefore will not corrode the inside of my metal wheels."
This is TRUE, but who cares? Air won't corrode your wheels to the point of failure either, neither will CO2. Metal wheels Don't commonly fail due to corrosion from the inside of the rim. Wheels are well engineered parts of your car and for good reason. They support tons of moving weight over uneven terrain and obstacles. Have you ever heard of swapping out old wheels for new ones because the rims were made unsafe due to corrosion?
Claim #6. N2 in tires provides a smoother ride.
Yes, this is an actual claim in a nitrogen supplier's literature. Since nitrogen is no "softer" than air or CO2 our assumption for the claim is that if the nitrogen pressure doesn't increase as much as air the tires stay softer as the tire heats up. This is false (see Gas Test).
Claim #7. "N2 is used in aircraft tires and the NASA space shuttle tires so it must have advantages for me too."
Aircraft tire manuals state that oxygen content in the tires must not exceed 5%. This is to minimize combustibility. These tires also see extreme temperature and altitude swings that your car or RV tire will never experience.
Claim #8. "N2 in my tires will save me in fuel costs."
Fuel savings from tires depends on tire pressures. As long as tires are kept up to their proper pressures it does not matter which "gas" is in them. And no matter which gas you choose you should keep up a regular and frequent tire pressure check procedure because you never know when you may have picked up a nail or other tire damage that could be causing a leak.
Claim #9. N2 will make my tires last longer.
Tread longevity depends on tire pressure maintenance, alignment, and a properly working steering and suspension system. The only difference N2 makes in the interior of the tire is that there is no oxygen being diffused into the tire';s rubber. Interior carcass deterioration from an air filled tire is not an issue to be concerned about especially when compared to the affects of heat, UV, moisture, ozone, and road hazards that the tires are constantly exposed to.
THE GAS TEST
Ideal Gas Law Formula Shmormula. I wanted to see for myself what different pressure changes I would see between N2, "air", and CO2 so I came up with my own test. I decided I could not use tires for comparison testing because of the numerous potential variables like stem leaks, bead seals, tread damage, flaws in the rubber, etc. I also wanted to test the gases in the most extreme temperature range as possible, as quickly as possible so fitting the gases in the freezer would also be a plus. Instead of tires I used high pressure aluminum bottles fitted with a valve and a pressure gauge. All were leak-tested at 600 PSI to ensure a leak-free test vessel. I did two tests; one at a low pressure representing normal car or light truck tire pressures and the second at a high pressure representing RV and tractor tire pressures. Here are my results.

Low Pressure Test:

Figure 1 - I used an infra red surface thermometer to measure bottle temperatures. Each bottle was allowed to stabilize to temperature for at least three hours to ensure that the gas temperature was the same as the surface temperature. Our freezer got our bottles down to -11ºF in this test for a good starting temperature.

Figure 2 - This photo shows the three bottles fresh out of the freezer at -11ºF and all with a starting pressure of 40 PSI. Almost immediately after removal from the freezer the bottles started to frost up on the surface. Each bottle is marked with its gas contents (CO2, N2, Air).
Figure 3 - Our shop temperature was 88ºF so this became our next test temperature. All bottles were allowed to stabilize at this temperature for at least three hours. As you can see the pressure on the gauges of all of the bottles is virtually identical at 52 PSI. So far all of the gases have increased in temperature by 99ºF and in pressure by 12 PSI.

Figure 4 - We found out that if you stick a black aluminum bottle on top of a steel car hauler in the afternoon sun for a few hours you can get some damn hot bottles. You are seeing a bottle temperature of 117.3ºF

Figure 5 - At 117degrees F our gauges show a near identical pressure on all of them at ~57 PSI. Note: The "air" bottle gauge seems to show a higher pressure than the other gauges This is due partly to the angle of the camera to the gauge pointer. All gauges showed pressures within 1 PSI of each other.

Conclusion of Low Pressure Gas Test:
Through a 128ºF temperature swing from -11ºF to 117ºF all gas samples showed virtually an identical pressure increase of 17 PSI from 40 PSI to 57 PSI. For an automotive tire this temperature delta represents an extreme real-life case but it shows that the Ideal Gas Law formula does apply to these gases and when it comes to thermal pressure stability none has any apparent advantage over the other.

High Pressure Gas Test:
As gas pressures move further away from atmosphere (14.6 PSI) the Ideal Gas Law becomes less accurate. So how would the gases react to temperature at the high tire pressure range such as those found on RVs and tractor trailers?

Weeks separated our two tests and surprisingly when we checked the start temperature of the bottles for high pressure test it was at a super cold 20 degrees below zero F. All the better.

The bottles were left in the freezer for days before they were removed for our test to ensure they were all leak-free .

The bottles were removed from the freezer and within seconds in the warm mid day heat our bottles began to frost up and then thaw out.

One odd phenomenon that I noticed was how each bottle seemed to thaw out differently. The N2 (left) thawed from the bottom first similar to the air (right) while the CO2 (center) seemed to thaw quickly and evenly.

Within three minutes out of the freezer in 90ºF ambient temperature our bottles'; surface temperature had gone from -20F to over 40F and continued to climb at a rapid pace. Outside temperature is over 100* in the shade here. Bottle pressures at this moment all show approximately 95 PSI.

Once our bottles had warmed up to near ambient temperatures I brought them into our air conditioned office and allowed them to stabilize to the office temperature of 75 degrees F.

At 75 degrees F. So far the bottles have gained 95 degrees (-20 to 75) and all show an identical pressure of 100 PSI, an increase of 21 PSI.

It's 101F in the shade and our bottles are now temperature stabilized.

In the 101˚F temperature (121˚F increase) the gauges showed a difference of about 2 PSI. (Pressures: N2-103 PSI, CO2-105 PSI, AIR- 103 PSI).

Hot, hot, hot. Afternoon sun + steel deck = 134 *F! After a couple hours in the hot sun our thermometer showed a bottle temperature of 134*F. This is hotter than your tires should ever get but if they did your tire pressure would be virtually the same whether you had them filled with N2, CO2, or air. (Pressures: N2-108 PSI, CO2-110 PSI, AIR-108 PSI).

Conclusion of High Pressure Gas Test:
At the higher tire pressure commonly seen in RV tires we took the gases through a temperature range of 154ºF (-20ºF up to 134ºF). Our start pressure was 80 PSI @ -20ºF and over the 154ºF temperature increase we saw the gas pressures all increase virtually the same amount to within 2 PSI of each other. In the end, the N2 and "air" test samples topped at 108 PSI while the CO2 sample topped out at 110 PSI. Note that the pressure changes that we saw in our bottles are the same as what you'd experience in your big RV tires despite the difference in volume. What does this mean? No matter which of these gases is in your RV tires, your handling, performance and tire wear will be the same.

THE IDEAL GAS LAW FORMULA might help explain why different gases expand at virtually the same rate as their temperature increases.
A gas may be completely described by its makeup, pressure, temperature, and volume. Where P is the pressure, V is the volume, n is the number of mols of gas, T is the absolute temperature, and R is the Universal Gas Constant,

This formula is the "Ideal Gas Law Formula." Although there is no such thing as an ideal gas the formula is pretty accurate for N2, CO2, and oxygen as we assume that the gas molecules are point masses and the collisions of the molecules are totally elastic. (A completely elastic collision means that the energy of the molecules before a collision equals the energy of the molecules after a collision, or, to put it another way, there is no attraction among the molecules.) The formula becomes less accurate as the gas becomes very compressed and as the temperature decreases but here "very compressed" pressures are well above even the highest tire pressures and "decreased temperatures" are extremely cold, too cold for tires. There are some correction factors for both of these factors for each gas to convert it to a Real Gas Law Formula, but the Ideal Gas Law is a good estimation of the way N2, CO2 and "air" should react through temperature changes. What does all this mean? It simply means that "air", nitrogen vapor, and CO2 vapor should all react pretty much the same within normal tire pressures (0-120 PSI) and temperatures.

Stan's NoTubes Tubeless Sealant Pucture Demo Video

2014-02-10T22:59:00.001-08:00

Incredible flat protection from Stan's

CLick text link below to watch video at NoTubes.com

Stan's NoTubes Pucture Demo

http://www.notubes.com/help/videopopup.aspx?id=33424626&type=vimeo&width=854&height=480

CPSC Recall: 3T Design Recalls Cervélo Bicycles with Aduro Aero Handlebars Due to Risk of Injury

2014-02-04T21:35:00.003-08:00

CPSC Recall: 3T Design Recalls Cervélo Bicycles with Aduro Aero Handlebars Due to Risk of Injury

http://www.cpsc.gov/en/Recalls/2014/3T-Design-Recalls-Cervelo-Bicycles-with-Aduro-Aero-Handlebars/

Click link above for full article

CPSC Recall: SRAM Recalls Hydraulic Bicycle Brakes Due to Crash and Injury Hazards. (SB, Red, Disc, Rim, 700)

2014-01-14T16:40:00.002-08:00

CPSC Recall: SRAM Recalls Hydraulic Bicycle Brakes Due to Crash and Injury Hazards. Models including:
SB Red Hydraulic Road Disc, SB Red Hydraulic Road Rim, SB 700 Hydraulic Road Disc, and SB 700 Hydraulic Road Rim

Click text link below for full CPSC article:

http://www.cpsc.gov/en/Recalls/2014/SRAM-Recalls-Hydraulic-Bicycle-Brakes/

CHP New Bicycle Law Goes Into Effect September 26, 2014

2014-01-05T00:43:00.000-08:00

http://www.chp.ca.gov/pdf/media/13-50a.pdf

Martyn Ashton, Chris Akrigg, Danny MacAskill - Road Bike Party 2 Video! Colnago

2013-12-31T14:55:00.000-08:00

http://digg.com/video/this-is-the-greatest-cycling-video-of-all-time

Take three of the world's most talented trials riders and make them go on a road bike ride. Beautiful things happen.

CPSC Recall: Specialized Recalls Source Eleven and Source Expert Disc Bicycles Due to a Fall Hazard | CPSC.gov

2013-12-31T00:31:00.001-08:00

Read full article at link below:

Specialized Recalls Source Eleven and Source Expert Disc Bicycles Due to a Fall Hazard | CPSC.gov

2014 Wildflower Century Registration Opens Noon January 5th

2013-12-29T00:20:00.001-08:00

Click text link below to get more info at the SLOBC website:

http://www.slobc.org/wildflower/index.html

Wildflower Century

Date: April 26, 2014
Registration Fee: $75

The Wildflower Century starts and ends in Creston at Creston Elementary School. The century takes you through the green hills and secluded valleys of northeastern San Luis Obispo County. See California the way it was during the mission days.

Route Choices

Routes	GPS	PDF (in new window)
Century Route	Century GPS	Century PDF
70 Mile Route	70 Mile GPS	70 Mile PDF
50 Mile Route	50 Mile GPS	50 Mile PDF

All three routes leave Creston on O'Donovan Road that ascends very gradually for 5 miles. At the intersection of O'Donovan Road and Highway 58, the 50 Mile Route turns left and the 70 Mile and Century routes turn right. The 70 Mile and Century routes proceed West on Highway 58 and turn South on Huer Huero for a lovely climb. At the top of the climb, the 70 Mile route descends Parkfield while the Century route descends Las Pilitas. Both are great descents. The two routes join up again at the rest stop at the Parkhill Fire Station.
Leaving the Parkhill Fire Station, the 70 Mile and Century routes travel East along the rolling hills of Highway 58 to join with the 50 Mile riders at the Shell Creek rest stop. If we are lucky, the weather and rain has resulted in a blanket of wildflowers along Shell Creek Road as everyone descends toward the lunch stop in Shandon.
After lunch, you face the challenge of a long gradual ascent up Highway 41 to the next rest stop. Shortly after this stop, you will reach the top of the hills and have wide-open views before you descend and pass many horse ranches as you turn toward Creston. The 70 and 50 Mile routes will continue into Creston while Century riders enjoy a beautiful loop along La Panza with a rest stop at Shadow Run Vineyard before continuing on Highway 58 and O'Donovan Road on their way to Creston. At the end of the day, everyone will enjoy a well earned BBQ at Creston Elementary School.

The Wildflower Ride includes:

Great food
Beautiful scenery
Colorful ride patch
BBQ after the ride for all registered riders
Enthusiastic support
Event Photography by PhotoCrazy.com
Opportunity to purchase Wildflower Clothing

Wildflower Safety

Approved helmets are required to be worn by all riders. NO HELMET, NO RIDE!
All minors must be accompanied by an adult
All riders are expected to follow Safe Cycling Best Practices
Rear-view mirrors to monitor overtaking vehicles and cyclists are encouraged. (California law requires that cycists move right to allow vehicles to pass.)
Portable audio devices using ear pieces are discouraged. (California law mandates that ear pieces be used in only one ear.)

Friday Fest - Creston Spaghetti Feed

Eliminate the hassle of the Saturday morning crowds! Come out to Creston Friday night and pick up your registration materials. While you're there do a pre-ride carb load-up and benefit our host, the village of Creston, at the annual Spaghetti Feed put on by the Creston Women's Club Scholarship Fund.

Features: Spaghetti, bread and salad
Price: $10.00 (adults), $5.00 (children under 9)
Date: Friday, April 25, 2014
Time: 5:00 PM to 8:00 PM
Location: Creston Elementary School

Saturday Morning Coffee

We are proud to support the communities that host our events, as can you. The Creston School Science Camp will be hosting a booth at which they will sell coffee and treats you can purchase before you set out on your ride. You will find their booth near the registration area Saturday morning.

SLOBC Supports the Community

The SLOBC uses the funds from its rides to support the great work of the San Luis Obispo Bicycle Coalition, sponsor scholarships for the Cal Poly Wheelmen and Shandon High School, support programs at Creston Elementary, contribute to the maintenance of mountain biking trails, support bicycle advocacy organizations, promote helmet use in our area and other issues of concern to bicyclist.

CPSC Recall: Fox Factory Recalls Evolution Mountain Bike Suspension Forks Due to Fall Hazard

2013-12-19T22:27:00.001-08:00

http://www.cpsc.gov/en/Recalls/2014/Fox-Factory-Recalls-Evolution-Mountain-Bike-Suspension-Forks/

CPSC Recall: Trek Recalls Madone Bicycles Due to Crash Hazard; Front Brake Can Fail | CPSC.gov

2013-12-13T11:26:00.001-08:00

Description

This recall involves model year 2013 Trek Madone bicycles with model numbers 5.2, 5.9, 6.2, 6.5, 7.7 or 7.9, and serial numbers starting with WTU and ending with G or H. A list of all serial numbers included in the recall is at www.trekbikes.com. Some of the recalled models are custom-ordered Project One Madones. The model number is printed on the bicycle frame. The serial number is printed on a sticker underneath the frame of the bicycle. The bicycles were sold in a variety of colors.

Click text link below for full description.

Trek Recalls Madone Bicycles Due to Crash Hazard; Front Brake Can Fail | CPSC.gov

CPSC Recall: SRAM Recalls Red WiFli Derailleurs for Bicycles Due to Fall Hazard

2013-12-04T22:10:00.000-08:00

CPSC Recall: SRAM Recalls Red WiFli Derailleurs for Bicycles Due to Fall Hazard

Click link below for full article:

http://www.cpsc.gov/en/Recalls/2014/SRAM-Recalls-Derailleurs-for-Bicycles/

Local News: Cambria get a Bike Kitchen assisted-service, public use bike repair shop

2013-12-02T10:08:00.001-08:00

Article in The Cambrian Newspaper 11/29/13. See full article at link below.

http://www.sanluisobispo.com/2013/11/29/2810075/getting-bike-kitchen-cooking.html

Local and traveling cyclists now have a Cambria Bike Kitchen to repair their bikes under the guidance of Slabtown Rollers bike club volunteers. Used bikes and parts will also be available. See article for all the details. Open house orientation is tonight 6pm Dec 2.
Bike Kitchen orientation

An orientation for the new Cambria Bike Kitchen starts at 6 p.m. Monday, Dec. 2, at 1602 Main St. Anyone who’d like to volunteer or is just interested is welcome.

Bike kitchen hours are, for now, set for 1 to 5 p.m. Tuesdays and Sundays. As volunteers are trained, the shop could be open more often. For details, call 927-9033 (first) or 909-9050.

Read more here: http://www.sanluisobispo.com/2013/11/29/2810075/getting-bike-kitchen-cooking.html#storylink=cpy

http://www.sanluisobispo.com/2013/11/29/2810075/getting-bike-kitchen-cooking.html

Wheelie Willy's Templeton Cycle Passion

The Dirt on DOT Brake Fluid vs. Mineral Oil, Compatibility, and Specs

DOT Brake Fluid vs. Mineral Oil - and the Winner is..

The Role of the Brake Fluid

Types of Brake Fluid

DOT Fluid

Boiling Temperatures

What happens when brake fluid starts to boil?

What is meant by dry and wet boiling points?

So where does this water come from?

Hell no H2O!

So what about DOT 5 brake fluid?

So what is it good for?

Mineral Oil

Mineral Oil Boiling Temperatures

Brake Fluid Shelf Life

DOT Brake Fluid

Mineral Oil

Compatibility Between Brake Fluids

What about compatibility between Mineral Oil brake fluids?

Which Brake uses which Brake Fluid?

Advantages and Disadvantages

And the Winner is..

Sources:

Breaking Away Star Meet and Greet and Film Showing Happening Oct.25th 5pm in San Luis Obispo at Mama's Meatball and Freemont Theater

Come Ride the Public Multi-Rider Level Freeride Trails Built By FASTA Association in San Luis Obispo

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FASTA: Freeride and Sustainable Trails Association

http://www.gofasta.org/trail-map/

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CPSC Recall: 2014 GT Fury Expert and 2014 GT Fury Team downhill mountain bicycles

Cycling Sports Group Recalls GT Brand Mountain Bicycles Due to Crash, Injury Hazards

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Description

Incidents/Injuries

Remedy

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Remedy

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CPSC Recall: Tern Stile: Link Uno, Link D7i, Link D8, Link P9, Link P7i, and Link P24h

Description

Incidents/Injuries

Remedy

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CPSC Recall: 2014 SCOTT® Speedster 30 and 40, and Contessa Speedster 25 and 35 road bicycles

Recall Details

Units

Description

Incidents/Injuries

Remedy

Sold at

Manufacturer

Manufactured in

CPSC Recall: BMC Alpenchallenge, Masschallenge and Urbanchallenge Bicycles with Aprebic Forks

Recall Summary

Recall Details

Units

Description

Incidents/Injuries

Remedy

FASTA:
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