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Front Brake Judder...

Old 08-14-08, 03:59 PM
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Bak182
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Front Brake Judder...

Hey,

My kona seems to have developed a very noticable judder on the front brake (well noticeable at low speed/low pressure, no so much on high speed/fast stops).

I have a kona firemountain deluxe 08, the brakes are stock Hayes MX4 Mechanical, this has only become a problem since my last ride.

The bike is 3 months old, but I've put alot of time in the saddle, I'm wondering where to start with troubleshooting this.

The judder is definatley visible, I can see it but feel it more.

Headset appears tight, and from what I can tell (haven't got a tool to do this) the rotor is straight. I've checked the mounts these seem tight enough, is it possible the pads have worn unevenly and this is causing a judder?

Are there other things I can check before I decide it's above me and drop it in to the LBS?

Thanks in advance for any help
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Old 08-14-08, 05:56 PM
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swskeptic
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Judder? I'm going to take a guess at what you meant by that, have you checked to see if the rim is true (in alignment, if not, that is most likely the culprit).
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Old 08-14-08, 06:05 PM
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On cars with discs, you'd always suspect a warped rotor if you're getting such effects. Shouldn't be too difficult to see if the rotor is true; just hold a fingertip lightly against it while you rotate the wheel.

Worn pads? I don't have much experience of discs; don't know what the lifespan of the pads is.
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Old 08-14-08, 06:06 PM
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the mechanism that holds the brakes to the frame is tight? the disc itself is tight?
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Old 08-14-08, 06:24 PM
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Michel Gagnon
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Grease on the rotor? If you made some maintenance, that's a distinct possibility. Clean the rotor with alcohol or another degreaser and see whether it solves the problem.
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Old 08-14-08, 06:32 PM
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rinse off with water... or ride in the rain, too.
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