MOUNTAIN BIKE MAINTENANCE: Disc Brakes
Loosen Mounting Bolts where the brakes mount on the frame or fork.
Squeeze and hold brake lever while retightening mounting bolts.
Test your brakes. If they are still making some noise, proceed to the following steps:
(only if previous steps didn't resolve rubbing noise) - Manually align pads (note: this takes a little bit of feel and patience, but your brakes will adjust great!):
1. Loosen Mounting Bolts Slightly
2. While keeping one hand by Mounting Bolts, carefully spin the wheel with the other and move the brake mechanism back and forth until it spins freely.
3. When it spins freely, hold it in place and retighten the Mounting Bolts.