Mountain Biking - Question about disc rotors.

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flaming_burrito
10-23-04, 07:29 PM
I can't remember if I've already asked this yet or not. When I was riding one day I fell and VERY SLIGHTLY tweaked my disc rotor. For about a day it made a rubbing sound when I rode on the road. Now it only makes the sound when I lean to one side, and I think it's to the right, and the rotor is on the left. Any idea what's causing this.

Dannihilator
10-23-04, 07:30 PM
Rotor is either bent or warped.
enduro
10-23-04, 07:32 PM
You can usually bend the rotor back into shape without a problem. My bike was recently shipped and one of the discs got bent slightly, but I just bent it back with my hands. It looks and works perfectly again.

flaming_burrito
10-23-04, 08:13 PM
but it's to little to tell, so how could i bend it bike like, a fraction, of a fraction, of a fraction, of a fraction, of an inch without over doing it???
enduro
10-23-04, 08:21 PM
It's sort of like truing a wheel, just find the warped spot and then tweak it just slightly, and recheck it often. Push or pull on it slightly, then spin the wheel to see what you've done. Increase force as necessary. When I did it, it didn't feel like I was bending the rotor when I was pulling on it, but after spinning the wheel I saw the difference.