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U-Brake Help

Old 08-09-12, 02:26 PM
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cs1
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U-Brake Help

For all the experts out there on U-Brakes, and I'm not one. Why do some have a front and rear and others just say use on either end?

I'd like to use a set of the CNC brakes on an old MTB. Originally they used the same Deore U-Brake on both ends. Any help would be appreciated.
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Old 08-09-12, 04:13 PM
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Are you saying front/back? If you're riding BMX (or any freewheel at all really) back is an absolute necessity. Front is suggested on any bike thats bigger or used out on the road.
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Old 08-09-12, 04:19 PM
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Originally Posted by Street rider View Post
Are you saying front/back? If you're riding BMX (or any freewheel at all really) back is an absolute necessity. Front is suggested on any bike thats bigger or used out on the road.
What I meant was either front or rear specific.
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Old 08-09-12, 08:13 PM
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Usually the difference is just the hardware for the cable. The arms, springs, and bolts are the same.
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Old 08-09-12, 08:32 PM
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Hah. Completely read your question wrong. Like MC said, its really about cables. The bolts should fit either one, because the mounts are all spec'd to the same width.
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Old 08-11-12, 12:53 AM
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Originally Posted by Street rider View Post
Hah. Completely read your question wrong. Like MC said, its really about cables. The bolts should fit either one, because the mounts are all spec'd to the same width.
I was hoping that was the case. The front shouldn't be a problem. The rear is chainstay mounted.
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Old 08-11-12, 02:14 PM
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If you have a small gearing like 25-9, it could be tough to fit. Probably won't. They make 'slim' u brakes though, which might fit.
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Old 08-13-12, 10:54 PM
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Originally Posted by Street rider View Post
If you have a small gearing like 25-9, it could be tough to fit. Probably won't. They make 'slim' u brakes though, which might fit.
I'm sure fitting one to the front won't be hard. The rear is where it seems like it could get messy.
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Old 08-14-12, 05:59 AM
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Right. But since you're freewheeling, and are actually going to use them, a rear brake is a must. The front alone won't cut it.
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Old 08-14-12, 09:33 AM
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rare, but there were Self Energizing U brakes , which were directional ,
because of the internal mechanism, a coil spring, and helix..

as the pad hits the rim the motion pulls the helical follower tighter on the rim..

Then which way it faced, matters a lot..

NB: Though on the rear, if the mounting is below the chainstays,
then functionally it is like a front brake, on the trailing side of the rotation of the wheel.

Last edited by fietsbob; 08-14-12 at 11:04 AM.
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Old 08-26-12, 03:16 PM
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Originally Posted by fietsbob View Post
rare, but there were Self Energizing U brakes , which were directional ,
because of the internal mechanism, a coil spring, and helix..

as the pad hits the rim the motion pulls the helical follower tighter on the rim..

Then which way it faced, matters a lot..

NB: Though on the rear, if the mounting is below the chainstays,
then functionally it is like a front brake, on the trailing side of the rotation of the wheel.
I know there were self energizing cantilevers but not U-Brakes.
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