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My bicycle's mechanical disk brakes are failing! Answered

My rear disk brake is in a sad state.  I squeeze the rear brake lever as hard as I can, yet, my stopping power is nil.  I wiped down the rotor with rubbing alcohol, but to no avail.

It might also be relevant that I ride frequently in snow and slush, and also in dusty areas.

The bike is the Specialized ''Rockhopper," 2009 edition, with about 450-550 miles put on it.

What can I do to fix  the brake so that I won't have to rely on the front brake?

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kelseymhBest Answer (author)2010-12-20

Have you been maintaining them properly? Are the pads of sufficient thickness, and adjusted correctly? Are these strictly mechanical, or is there a hydraulic system? The latter may need to be bled.

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tincanz (author)kelseymh2010-12-20

Thanks for the site, and yes, I have been maintaining them well.

The brakes are strictly mechanical, no hydraulics.

I don't know how to check the pads, or to adjust them...

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FriendOfHumanity (author)tincanz2010-12-21

http://www.utahmountainbiking.com/fix/diskbrak.htm

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tincanz (author)FriendOfHumanity2010-12-23

great site...

thank you very much

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airsofter1 (author)2010-12-20

My guess is that they are just not adjusted correctly. If you don't know how to adjust them then take it to a bike mechanic. If you can determine that they don't need to be adjusted, you should still take it a bike mechanic to solve the problem.

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neffk (author)2010-12-20

Check your cables to make sure they're not seizing.

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tincanz (author)neffk2010-12-20

they definitely aren't.

the cables move and the pads clamp slightly, just not enough.

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