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Will disc brakes ever be used on the road?(11 posts)

Will disc brakes ever be used on the road?PODIUMBOUNDdotCA
Dec 1, 2002 10:04 PM
To answer my own question it looks like they have. Look at the bottom left hand corner.

re: Judging by the tires and dirt...Akirasho
Dec 2, 2002 2:13 AM
... I'd say that's a cyclocross bike (it says so in the caption) and not a "true" road geometry frame... but it's proof of concept and will probably generate some type of market response... to what degree remains to be seen (Cannondale makes and markets a disc equipped CX bike among others).

I still think we'll see a disc equipped specialty descender (akin to a lightweight ascender) at le Tour, either this season or the next (if for nothing else, as a testbed)... despite most finishes being on an uphill, there should be enough nail biting descents on certain stages to test their power and modulation over long periods of application.

We abide.

Remain In Light.

Be the bike.
Question is, how much weight does it add, andfbg111
Dec 2, 2002 5:53 AM
is that extra weight worth it?
Question is, how much weight does it add, andpeter1
Dec 2, 2002 7:54 AM
Judging by mountain bikes, it adds about 500 grams when you include heavier cables, oil weight (the best ones are hydraulic), calipers and discs. But you also have to factor in the need for heavier forks. On the plus side, some in the industry expect carbon fiber discs to appear soon.

Benefits: longer rim life, bad-weather stopping ability, eliminates need for flat braking surface on rims, no more worries about slightly out of true rims (since the brakes are at the hubs), and freedom for frame designers.

Drawbacks (for now): Cost and weight.

From my mtb experience, property set up disc brakes are much better than calipers.

Would the extra pound be worth it? For me, yes.
These use road levers (nm)PODIUMBOUNDdotCA
Dec 2, 2002 9:03 AM
Question is, how much weight does it add, andfbg111
Dec 2, 2002 10:49 AM
Interesting, thanks for the analysis. Carbon disc brakes sound awesome, especially.

"freedom for frame designers"

Any idea what kind of frame changes will we see when designers use that freedom?
re: Will disc brakes ever be used on the road?commuterguy
Dec 2, 2002 7:56 AM
I was under the impression that the limiting factor for road bike braking was the coefficient of friction that road tires can generate. With road tires, the contact patch is so small, and tire pressures so high, that locking up wheels happens very easily with the stopping power that rim brakes can generate, to say nothing of what a disc brake can.

Mountain bike tires are so much wider, and are designed to be ridden on soft terrain. This, I thought, yields a much bigger contact patch that can grow under braking (the soft tires flatten out some). Also, disc brakes are supposedly much more effective in dirty and wet conditions that are more commonly encountered off road than on.

Anyway, that's my .02. It doesn't seem to me that a true road bike would benefit from disc brakes.
Just commute somewhere wet, oily and hilly - you'll see. nmEager Beagle
Dec 2, 2002 8:00 AM
Dec 2, 2002 10:03 AM
Vanilla Bikes out of Portland, OR is making some absolutely beautiful touring/road set ups with disks. All customs, of course. Their custom disk mounts with the "V" are simply works of art. There is something on their site about the owner burning through a set of rims in a few rainy Oregon days. They may make sense for commuting/touring somewhere that wet.
HereEager Beagle
Dec 2, 2002 10:43 AM
Yes, when the technology becomes lighter. (nm)Spinarooni
Dec 2, 2002 4:13 PM