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Old 05-19-08, 09:45 PM   #1
Wiggle
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Front brake rubbing on Trek 7100

I've got a Trek 7100 that has an issue with the front break rubbing but it's a bit strange... I've adjusted the brake and it tracks fine if I spin the wheel, it clears no problem. But once I get on the bike I get a rubbing mainly when I stand up on the pedals and push with alot of force. I can lower it by increasing the pad clearance but ultimately it gets to the point where I start to sacrifice stopping power to reduce the noise. I'm not quite sure what could cause this but it seems to be related to me loading the bike with my weight, I'm about 195-200lbs so I'm not a lightweight.

Firstly, is this even something to worry about? Its not enough rubbing to cause noticable friction but still I think I'd like to solve it.
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Old 05-20-08, 12:37 AM   #2
Torchy McFlux
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Fork flex.
Replace them with stiffer/heavier ones if the brake rub really bothers you.
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Old 05-20-08, 09:15 AM   #3
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Thanks, does this mean ultimately the fork will be damaged or is it ok? If it won't harm anything I won't worry about the noise.
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Old 05-20-08, 09:24 AM   #4
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I'm not sure about fork flex but I've had front wheels which flexed enough to rub the pads every time I stood up to pedal during climbs, for instance. A different wheel on the same bike had less lateral flex to rub the pads.
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Old 05-20-08, 10:03 AM   #5
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Have the wheel tensioned.
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Old 05-20-08, 10:18 AM   #6
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Quote:
Originally Posted by blamp28 View Post
Have the wheel tensioned.
Some wheels were just flexy to begin with, like those earlier Spinergy Rev-X's which I still have and use on occasion. ...Also a lot of other composite wheels.
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