Les Freins Sur Jante Sont Morts. Vive Les Freins Sur Jante!

Tell me if I am the only cyclist who's seen a hundred articles or blog posts announcing The Death Of The Rim Brake.

I don't call myself a "retrogrouch":  At least one other blogger has laid claim to that title.  I also do not, however, use the newest and latest stuff just because it's the newest and latest stuff.  My bikes have steel frames (Reynolds), downtube shifters (except for my fixie), pedals with toe clips and straps, Brooks saddles, hand-spoked wheels and, yes, rim brakes:  dual-pivot side pulls on three of my bikes, single-pivot sidepulls (!) on two others and cantilevers on still another.

The reason I'm not making the switch is that the none of the cycling crashes or other accidents I've experienced had anything to do with braking power, or lack thereof.  Then again, I learned a long time ago to keep things in adjustment, replace cables and pads  before they seem to need replacing (every year or two, depending on the conditions in which I've been riding) and to clean my rims and brakes after wet or muddy rides. I use high-quality pads (Mathauser Kool Stop) and cables  employ good braking technique:  I usually anticipate my stops and apply the brakes accordingly.

Now, if I were riding carbon-fiber rims, I might understand the "rim wear" argument.  But even on a relatively light rim like the Mavic Open Pro, I manage to ride many, many miles (or kilometers) without significant wear.  And there might be other extreme conditions which I have yet to ride, and probably won't at this stage of my life, that could warrant disc brakes.

It works! (From Black Mountain Cycle)

But my dual pivots (Shimano BR- R650 and R451 and Dia Compe BRS 100), single pivots (Campagnolo Record) and cantilevers (Tektro 720) have all given me more than adequate stopping power.  Best of all, I can make adjustments or replace parts easily, whether I'm at home or on some backroad in Cambrai or Cambodia, without having to "bleed out" lines or deal with the other complications of disc brakes.

And, as much as I care about my bikes' aesthetics, they're not the reason I'm not using discs.  Actually, some of the discs themselves are rather pretty, and I suppose that in carbon or other modern configurations, the cabling and other necessary parts integrate well. But I still like, in addition to their pretty paint jobs, my bikes' clean lines which, in a sort of Bauhausian way, reflect the simplicity and elegance of their function.

Eben Weiss discusses the virtues I've outlined in his most recent Outside article--and how bike companies are squeezing rim brakes, for no good reason, out of the market.

Braking His Enthusiasm

Sometimes the old questions become new again.

A couple of days ago, I wrote about Specialized's decision to have two of its teams ride nothing but clincher tires with tubes on all except one-day "classics" races. They were, ironically, answering a question in the way many of us did two or three decades ago, when high-performance clincher tires and rims became available.  What made Specialized's action all the more interesting is that Roval, the wheel supplier to those teams, decided to offer two of their lightest wheelsets only for tubed clincher tires, thus bucking a trend--fueled at least in part by Specialized itself--toward tubeless tires.  All the more intriguing is that Roval's parent company is--wait for it--Specialized.

Now a four-time Tour de France winner is speaking against, if not bucking, another industry trend that Specialized has helped to foster. 

For this season, Chris Froome has switched teams--and bikes.  For the past ten years, he rode a Pinarello with rim brakes (what most of us ride) for Team Sky/Ineos. That run includes all of his Tour, as well as other, victories.  Now he is riding for Israel Start Up Nation and, as is customary when changing teams, he's also changing bikes.  His new main bike Factor Ostro VAM, and it's equipped with disc brakes.

Froome likes everything about the bike except the brakes.  While he admits that "they do what they're meant to do," he says he's "not 100 percent sold on them yet."  

Chris Froome.  Image by Noa Arnon.

Now, elite racers like Froome are hardly "retrogrouches."  As Eddy Mercx once famously observed, the function of a racer's bikes is to "win and make money."  So they normally welcome whatever will give them an advantage, and many old-timers imagine what they could have done if they'd had the kind of equipment today's pros use.

But Froome makes some of the same complaints about discs we've heard from other riders:  "constant rubbing, the potential for mechanicals, the overheating, the discs becoming warped on descents longer than five or 10 minutes of constant braking."

We've heard those complaints from Froome, other folks riding at all levels today--and from riders back in the 1970s, when I first became a dedicated cyclist.

In those days, discs weren't offered by as many companies--or as widely-used--as they are now. Then, almost all bicycle disc brakes in use were found on tandems, which of course require more stopping power than single bikes.  There were legitimate reasons, other than "retrogrouchiness," why other cyclists didn't use them:  They were even heavier, more cumbersome and complicated than they are now--and even more prone to failures.  In fact, Phil Wood's disc brakes may have been the company's only unsuccessful offering.

What tells us a lot about the state of disc brakes in those days was that they weren't adopted by the early mountain bikers, who retrofitted their old balloon-tired bombers--or built new frames--with cantilever brakes.  One reason was that Joe Breeze, Gary Fisher and all of those other dudes barreling down northern California and New England fire trails were engaging in what would be branded as "downhill" riding in the '90s.  In other words, they were subjecting their bikes to at least one of the conditions Froome describes.  

In a way, Froome is dealing with an issue that faced cyclists of the 1970s and 1980s, just as those Specialized teams dealt with one that confronted cyclists a decade later.  And, while Froome hints that, for the moment, the new answer may be the old answer, those teams are answering it in the way many of us did all of those years ago.

His Stance On Discs

Nearly two years ago, a driver in China narrowly missed death when a runaway circular saw blade impaled the front of his car.

I was reminded of that today after reading about what happened to Owain Doull.

The Sky Team rider crashed with one kilometre remaining in the opening stage of the Abu Dabhi Tour.  Normally, that wouldn't elicit much attention--riders crash during races all the time.  What is causing controversy, though, is an injury he suffered and, more important, what he believes to be the cause.

When he was being treated for road rash on his back side, he pointed to his foot and showed a cut that was visible through a tear in his sock.  

It's unusual, to say the least, for  riders to incur that sort of cut on their feet.  Even if they are wearing flip-flops, they are unlikely to incur more than some scrapes, painful as those wounds may be. 

So what could have cut through Doull's shoe and caused such a wound?  He says that it was the rotor of a disc brake.  "If anything, I've come off lucky here," he said.  "If that'd been my leg, it would have cut straight through it, for sure."

In other words, by a dint of fate, he narrowly avoided--at the very least--the kind of injury Francisco Ventoso suffered last year in the Paris-Roubaix race.  The directeur sportif of Movistar, Ventoso's team, said "The cut was so deep you could see the tibia."

That mishap led to a temporary ban on disc brakes in the peloton, which was recently lifted "on a trial basis" according to the sport's governing body, the Union Cycliste Internationale.  Disc brakes were allowed on the condition that the rotors' edges were rounded off. Marcel Kittel, the only rider using disc brakes in the Abu Dabhi tour, was using rounded Shimano rotors after insisting he wouldn't use technology otherwise.

Doull was asked whether he has a stance on disc brakes.  "I do now," he said.  "In my opinion, unless there are covers on those things, they're pretty lethal."

Others have expressed the opinion that "everybody or nobody" should use them in a race.  Whatever one thinks of disc brakes (I have never used them myself, and probably won't unless some compelling reason presents itself.), I think it's fair to ask why Kittel or anyone else saw the need to use them in pancake-flat Abu Dabhi.

Mature? Not Yet: Disc Brakes On Bicycles

In the mid-1970s, my high school acquired its first computer.  The father of one of my classmates, who worked in a nearby military base, in one of those jobs he couldn’t talk about, negotiated the purchase.  For $6000, my alma mater got a used machine, about half the size of a classroom—and with about half of the capacity of devices kids carry in their backpacks nowadays.

When I graduated the following year, one of my relatives gave me a new Texas Instruments Model 101 digital wristwatch.  With its red LED display and sleek goldtone band, it seemed like the epitome of elegance and slick high-tech, all rolled up into one.  No one else I knew had such a timepiece:  For the one and only time in my high-school years, I was the coolest kid in the class.  At least, that’s how I felt.

Neither the computer nor my watch made it past my sophomore year of college.  The big box (“It’s just an oversized, overpriced file cabinet!” one parent exclaimed upon learning what it cost) assigned classes like “Sports Heroes” to honors students who signed up for the Shakespeare seminar.  (I know.  I was one of those students.) And that was the least of the computer’s malfunctions. Worst of all, nobody seemed to know how to fix them.

And nobody seemed to know how to fix my watch.  One shop claimed that displays of numbers that had nothing to do with the time of day were a result of “water damage” –only moments after I took that watch out of its box.  (I have since learned that technicians and reps say “water damage” when your electronic device is acting up or not working and  they can’t figure out why.)

Less than a decade after I graduated high school, the Yankees were giving away digital watches (with the team’s logo, of course) as promotional items on Fan Appreciation Day. My graduation gift, in contrast, sold for more (in non-inflation adjusted dollars) than most smartphones or laptops cost today.  And the watches the Yankees gave away were more reliable (water resistant to 100 meters, and shock resistant) than the one I got on Graduation Day.   

I was thinking about the computer and watch as I read an article in the most recent Bicycle Quarterly.

In “Are Disc Brakes Mature Technology? “, Jan Heine recounts his and other BQ editors’ experiences with both mechanical and hydraulic disc brakes on road, mountain and city bikes.  While the brakes on one bike offered the power and modulation of good caliper brakes, their performance was hampered by their incompatibility with the levers that came on the bike.  The brakes on the other bike were not as good as road calipers and, worse, there were a couple of potentially serious failures. 

Heine seems to think that disc brakes have potential, but there are issues that need to be worked out.  Braking power is still determined mainly by the size of the disc.  A larger disc is heavier and could necessitate larger forks—both of which are anathema to racers and other performance-oriented cyclists.  More important, though, is that while larger discs offer more power, they seem to offer less modulation.  From what Heine and others say, it seems that larger rotors give the brakes the “all or nothing” feel that V-brakes (at least the ones I’ve used) always seem to have.

Avid BB7 disc brake on Look X85 cyclo-cross bike

The flip-side is, of course, that smaller rotors offer less power.  And, if there isn’t enough power, whatever modulation the brakes offer is all but irrelevant.

Another problem, as Heine points out, is that on disc brakes, the pad grabs the disc on the rear.  On a front fork, that means the wheel is pulled away from the dropout (or fork end).  When you’re barreling down a hill—or sluicing through traffic—few things are more dangerous than a front wheel popping out of a fork. 

Most modern quick release levers, Heine says, aren’t secure enough for bikes with powerful disc brakes.   Through-axles, like the ones found on downhill bikes, might be a solution.  But even with them, the fork blades on most non-suspension (telescoping) forks wouldn’t be stiff enough to counter the forces the brakes would put on them.  So, Heine says, a dedicated suspension fork might be the best kind to use with disc brakes.

 (In contrast, rim brakes pull the wheel slightly upward, into the dropout.  And their forces are concentrated in or near the stiffest and strongest part of the fork:  the crown.  That is the reason why properly-installed wheels don’t fall out of forks equipped with rim brakes or no brakes.)

I myself don’t plan to start using disc brakes any time soon:  I have never had trouble getting the braking power and modulation I need from rim brakes, as long as I use good cables and pads and keep everything properly adjusted.  Plus, there is something to be said for the simplicity, not to mention the lighter weight, of such brakes.  So, I hope that disc brakes don’t become the only option on new bikes or that component manufacturers stop making rim brakes and parts.

On the other hand, I am not against some bikes coming with disc brakes, or for such brakes to be offered on bikes where they might make sense.  Most of all, I hope they don’t become a de facto standard—or the only option—before they are a “mature” technology.  At least, when my digital watch failed, I still had the mechanical watch another relative gave me for a birthday—my 12^th or 13^th, if I remember correctly.  And plenty of others were available. 

The CPSC Is Recalling 1.5 Million Bicycles Because....

All right.  I'm going to begin today's post with another "Which is worse?" question.  The difference is, this "Which is worse" question will have three choices.

Here goes...

Which is worse: 

• a technical "innovation" that's superfluous,
• someone who doesn't know to use it safely, or 
• some government bureaucrat who doesn't know the difference?

That question entered my mind when I learned of a recall involving bicycles from thirteen different manufacturers.  

The 1.5 million bikes in question have front disc brakes.   As "The Retrogrouch" and others have said, very few cyclists actually benefit from, let alone need,  disc brakes.  

To be fair, I will point out that, although the recall was announced as one involving "bicycles with front disc brakes", the brakes themselves were not the problem.

So why the recall?, you ask. 


According to the US Consumer Products Safety Commission, which ordered the recall, when the bicycle is ridden with the quick-release lever in the fully-open position, the lever is only 6mm (or, as the CPSC notes, the width of a number 2 pencil) between the lever and the brake rotor.   

I'll run that by you again:  If you ride one of those bikes with the front wheel's quick-release lever fully opened, the lever is too close to the brake rotor.

Now, if you're going to ride a bike with quick release levers, you should know how to open and close them, and you should know enough not to ride with them open.  Forget about whether you have disc brakes: If your quick release is open, your wheel can slide or fall out from under you when you turn or hit a bump.  Or the lever can get snagged in your spokes--or, if you have a disc brake, on the rotor.

That last scenario is what prompted the recall.  Three incidents of it were reported to the CPSC.  When the lever came into contact with the rotor, the wheel came to a sudden stop or fell out of the bicycle.  One of those incidents resulted in injury.

So, because someone who doesn't know how to use a quick release got hurt, 1.5 million bicycles are being recalled.   That's good, sound judgment from the CPSC, isn't it?

Here's how you can tell if your bike is part of the recall:



 

Disc Brake Failures, Now And Then

A few days ago "The Retrogrouch" alerted us to a disc brake failure reported on Bike Radar.  

One of BR''s test riders was riding a Specialized Tarmac Pro with Shimano R 785 disc brakes through Rocky Mountain National Park, on a course with some long and steep climbs and descents.  It's really not the sort of ride on which you want to lose your braking power.

The rider, Ben Delaney, describes what happened on a descent:  "I felt my rear brake go soft for perhaps 30 seconds, with the lever feeling mushy, and then go out completely.  Pulling the lever all the way had zero effect on the rear caliper."




Fortunately for him, he didn't crash and his front brake still worked well enough for him to complete his ride, and he wasn't hurt.  After the ride, he contacted Shimano and they retrieved the hose and caliper.

According to Shimano America road product manager Dave Lawrence, the failure was the result of an oil leak caused by a crack in the right side piston.  That crack wasn't caused by heat generated from braking, according to Lawrence's report.  The investigators observed slightly higher-than-normal disc pad contact with the rotor. "We have made several machine and riding tests in similar conditions, and we have not been able to replicate similar damage to the piston", the report continues.

What, exactly, caused that piston to crack is a fair question:  one that neither Shimano nor anyone else seems able to answer.  To be fair, that alone is not a wholesale indictment of disc brakes or Shimano.  However, it does beg the question of just how sensible or necessary disc brakes are for bicycles. 

On the few occasions when I felt my cable-and-caliper (i.e., dual-pivot or single pivot sidepulls, centerpulls, cantilevers or V-brakes, all of which I have used at some point or another) losing power or modulation, I didn't completely lose my braking ability and, when I stopped, I was able to spot and fix the problem quickly.  And, even when riding with loaded panniers in the Alps, Rockies, Pyrenees, Adirondacks and in the Green Mountains, whatever caliper brakes I used were sufficient as long as my pads and cables were good.

Now, I've worked as a mechanic in bike shops. But even before I started doing so, I'd taught myself how to fix my brakes, as well as other parts of my bike.  A cable-actuated caliper brake system can be adjusted with a minimum of tools:  In fact, most can be done without specialized bicycle tools (although said specialized tools certainly make the job easier and faster).  There is certainly something to be said for such simplicity when you're 100 kilometers from the nearest village.

Also, as "The Retrogrouch" points out, hydraulic disc brakes in cars and trucks are larger and more robust, and more protected from the elements, than any disc brake that could ever be fitted to a bicycle.  The ones scaled down to fit bikes will be more finicky and thus more prone to breakdowns--not to mention adding weight and complication to the bicycle.

The disc brake failure experienced by Delaney of Bike Radar, and relayed to us by "The Retrogrouch" is also not the first such failure.  In fact, bicycle disc brakes were failing in the 1980s, long before Shimano ever thought to manufacture them.

In those days, high-quality racing tandems were usually fitted with front and rear cantilever brakes, while touring tandems added a third caliper brake (usually a sidepull) on the rear.  A few tandems, usually custom-made, came with a drum brake attached to the rear hub.  The best of them was made by Arai in Japan.

Arai drum brake on Fat Chance tandem, 1985

For a time, some custom tandems came with this rear disc brake made by Phil Wood:

Phil Wood disc brake, 1980s

It's certainly an impressive piece of machinery, as most of Phil's products are.  Trust me; I know:  I use some of them,


The disc, made of an asbestos composite, was attached to the hub by a series of splines.  Those splines were prone to stripping, which caused a loss of braking.  To Phil Wood's credit, they responded to the situation rather quickly:  After only a few reports of incidents (none of which resulted in injury), the brakes were pulled from the market.

Again, I emphasize that while I question the wisdom of using disc brakes on bicycles, I do not believe that the problems or incidents I've mentioned are an indictment of disc brakes themselves.  Rather, I think they show that Shimano is trying to make something work 30 years after Phil Wood--known for making bike components that work better and  last longer than others--couldn't do it.  Not all technologies are transferrable from automobiles (or aircraft) to bicycles, and disc brakes might be one of those technologies.

N.B.:  Phil Wood discs were manufactured before the ban on manufacturing asbestos products was enacted in 1989.  That ban was overturned only two years later under pressure from lobbyists for the asbestos industry.

November Discs

Those of us who are writers or other creative artists have our own ways of getting started.  One obvious way for a writer is, of course, reading.  But many of us also follow visual cues such--or, as you might expect, take walks or bike rides.

When I first started writing poetry, I would sometimes begin my work with word associations.  For example, if I looked at the sky, I might write that word, then "flight", "wind", "skip", "bliss" or other words, and write a couple of lines using those words.

These days, I sometimes play a version of that game, if you will, on Google or some other search engine.  I might type in a word or phrase and see what comes up.

I did that a moment ago.  I typed in "bicycle november" and came up with a bunch of things, including a shop called November Bicycles.

Of course, I checked them out.  They're very much a racing-oriented shop, so I may not ever buy anything from them.  However, I like its owners' philosophy--or, at least, what I gleaned of it from the blog that's part of their site.

For one thing, they feel that racing bikes--and, especially wheels--cost too much.  So, as they explain, they market their own products and bypass many of the distribution channels through which other retailers obtain the merchandise they sell.

And they clearly have their own opinions about riding and equipment.  At least those opinions seem to be based on experience and common sense--and, unlike at least one other would be philosopher-bicycle retailer, they're  not evangelizing or selling a lifestyle.

Mike and Dave of November Bicycles

One blog post I found particularly interesting was "My Opinion On Disc Brakes."  In it, the author admits that he uses discs on at least one of his bikes.  But he also doesn't relish the prospect of them becoming the de facto industry standard for all bikes.  For one thing, trying to squeeze them into a road bike, which has narrower frame spacing than a mountain or cyclo-cross bike, can be problematic, especially if the bike has an 11-cog rear cassette.  The only way it seems possible to make it work is to use a brake with a smaller rotor, which negates most of the advantage a disc is supposed to have over caliper brakes.

About that advantage, he's skeptical, if not doubtful.  He also mentions problems in keeping them adjusted:  On some models, on some bikes,it's all but impossible to keep the pads mounted close enough to the rotor so that braking response is quick and powerful, without the pad occasionally rubbing on the rotor as you ride.  So you choose between response, power and modulation or being able to ride at more than a snail's pace.

What I found interesting is that the arguments he makes against disc brakes--except for the difficulty of using them with 11 (or even 10) cogs are ones I and any number of other mechanics could have made thirty years ago.

As I mentioned in an earlier post, "new" ideas in bike design (or almost any other area, for that matter) almost always are reiterations of things that had been done before.  For example, German manufacturer Altenberger made dual-pivot sidepull caliper brakes during the 1960's and '70's.  A few bikes were equipped with them; as one mechanic lamented, "They have the worst features of center pulls and side pulls, and none of the good features."  About twenty years ago, Shimano resurrected the dual-pivot concept and eliminated most of the problems encountered on the Altenbergers.

So it was with disc brakes.  As I recall, a Japanese company, a French company and Phil Wood made them.  For the latter, it was probably the only faulty product he ever made:  They were recalled.  But they, and the others, had the same problems with adjustability and issues with rotor size the author of November Bicycles mentions.  

Back in my day, the only bicycles that used discs were tandems.  Because tandeming has always been one of the smaller niches of the bicycling world, ideas, innovations and products developed for them rarely find their way onto other kinds of bikes.  That, and the problems I mentioned, are the reasons why disc brakes all but disappeared by the mid-1980's.