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Disc brakes in a crit?

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Old 07-06-10, 11:47 AM
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pretzelface
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Disc brakes in a crit?

With the UCI's recent legalization of disc brakes for CX, there's been lots of speculation as to whether they'll take hold in the road bike market as well (hydraulic brifters anyone?).

My question: would you feel comfortable with a disc-brake front wheel in a technical crit? I can see it being fine for everyday riding, but an asymmetrically-dished front wheel seems like it can't possibly be as stiff as a normal wheel. Is this concern well-founded?
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Old 07-06-10, 11:51 AM
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My concern is for the pile-ups in road races. Too much opportunity to get cut up by a rotor. Wheels can be built stiff enough to deal with it.
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Old 07-06-10, 11:54 AM
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Neutral wheel support would be an issue, for one.
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Old 07-06-10, 11:57 AM
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Originally Posted by waterrockets View Post
My concern is for the pile-ups in road races. Too much opportunity to get cut up by a rotor. Wheels can be built stiff enough to deal with it.
I didn't even think about that.
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Old 07-06-10, 12:22 PM
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The rotor could be integral to the rim.
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Old 07-06-10, 12:29 PM
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Originally Posted by mattm View Post
Neutral wheel support would be an issue, for one.
That makes it pretty much a non-starter.
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Old 07-06-10, 12:47 PM
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Originally Posted by shovelhd View Post
The rotor could be integral to the rim.
I've got several sets of those.
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Old 07-06-10, 12:49 PM
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Originally Posted by waterrockets View Post
My concern is for the pile-ups in road races. Too much opportunity to get cut up by a rotor. Wheels can be built stiff enough to deal with it.
I've done a tandem crit, with other tandems running disc brakes. Didn't really think about it at the time. But then again in a Tandem crit you've got other concerns to start with.
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Old 07-06-10, 01:01 PM
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My motorcycle has a front rotor that could be considered integral to the rim. Don't see why that couldn't be applied to road wheels.





Good idea, but still seems like a solution to a non-existent problem however (on a road bike) IMO.
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Old 07-06-10, 01:27 PM
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Originally Posted by saratoga View Post
My motorcycle has a front rotor that could be considered integral to the rim. Don't see why that couldn't be applied to road wheels.
You could even make the braking surface be a part of the rim!
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Old 07-06-10, 01:41 PM
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That's just crazy talk.
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Old 07-06-10, 01:42 PM
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Genius! Call it a rim braking system (RBS). It would be lighter than disc brakes since the braking surface is integrated (call the integrated braking surface IBS), but still have plenty of stopping power for road applications. You're really onto something.
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Old 07-06-10, 01:53 PM
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but but but rotating mass
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Old 07-06-10, 02:03 PM
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Originally Posted by bdcheung View Post
but but but rotating mass
Just drill holes in it to lighten it up some. The holes could also serve as convenient attachment points for some sort of threaded, tensioned connection to the hub.
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Old 07-06-10, 03:56 PM
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Originally Posted by brianappleby View Post
Genius! Call it a rim braking system (RBS). It would be lighter than disc brakes since the braking surface is integrated (call the integrated braking surface IBS), but still have plenty of stopping power for road applications. You're really onto something.
And you could make it out of carbon...
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Old 07-06-10, 05:26 PM
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I can't wait for the ad campaign. "You'll go faster when you have IBS." Carbon IBS extra.
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Old 07-06-10, 06:03 PM
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You guys are dorks.
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Old 07-06-10, 06:07 PM
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Why are you using your brakes so much in a crit?
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Old 07-06-10, 06:51 PM
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It would be a solution to a problem that doesn't exist. A conventional front brake is simpler, lighter, gives you a better wheel, and provides more than adequate braking performance on a road bike.
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Old 07-06-10, 08:59 PM
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Originally Posted by Dean V View Post
It would be a solution to a problem that doesn't exist. A conventional front brake is simpler, lighter, gives you a better wheel, and provides more than adequate braking performance on a road bike.
I disagree, road bike brakes leave much to be desired. The feel, power and pretty much everything about them is awful. Hydraudlic brakes would be a serious upgrade to even Dura-Ace level components let alone 105, etc. The stopping power of my stock-equipped 105 brakes is such a sick joke - they have no business being on a bicycle.

Why not keep the rim as the rotor surface and just change the calipers to hydraulic and add a master cylinder to the brifters?

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Old 07-06-10, 09:14 PM
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You mean like a Magura HS33? http://www.universalcycles.com/shopp...ils.php?id=222

They're not better than cable brakes for road use. And they weigh more and are more work to set up.

They are only used for trials bikes now. They are good for locking the wheel without a lot of finger pressure (you lock the back wheel a lot in bike trials while you're hopping around). But they're not any better for the kind of braking you do on a road bike. Especially since braking less, not more, is how you win races. Or so I'm told.
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Old 07-06-10, 09:15 PM
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Originally Posted by W Cole View Post
I disagree, road bike brakes leave much to be desired. The feel, power and pretty much everything about them is awful. Hydraudlic brakes would be a serious upgrade to even Dura-Ace level components let alone 105, etc. The stopping power of my stock-equipped 105 brakes is such a sick joke - they have no business being on a bicycle.

Why not keep the rim as the rotor surface and just change the calipers to hydraulic and add a master cylinder to the brifters?
What kind of pads are you using? I loved my 105 brakes with cool stop salmons. With a good cable job and those pads, I could flip myself over if I wanted to. Not that I'd ever want to do that again.
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Old 07-06-10, 09:24 PM
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Originally Posted by saratoga View Post
My motorcycle has a front rotor that could be considered integral to the rim. Don't see why that couldn't be applied to road wheels.





Good idea, but still seems like a solution to a non-existent problem however (on a road bike) IMO.
That's not integrated, it's attached. And rim attachment like this vs. hub attachment is a mixed bag.

The only downside to a disc on a road bike is it's heavier. You need to change the rim and hub design and come up with a fork.

Everything else if engineered right is far superior...feel, power, heat dissipation, wheel stability, you name it. Unless you thing F1 cars would do better with road bike caliper brakes...

My training bike has a disc front. It's not even hydraulic and it kicks the carp out of any caliper brake I've ever ridden.
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Old 07-06-10, 09:27 PM
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Disc brakes may be a lot better, but are they worth it? To me, it seems as though brakes are the last place I'd want to spend my $$ on a road bike (unless you're trying to drop weight off your bike).
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Old 07-06-10, 09:42 PM
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Originally Posted by mike868y View Post
Disc brakes may be a lot better, but are they worth it? To me, it seems as though brakes are the last place I'd want to spend my $$ on a road bike (unless you're trying to drop weight off your bike).
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