Originally Posted by genejockey

Easiest way to stop brake rub: get one of those thick business cards. Fold it in half. Take the wheel out, put the folded card over the disc. Re-install the wheel, sliding the card and rotor in between the pads. Loosen the caliper mounting screws enough that the caliper moves freely. Squeeze the brake lever and hold it while you tighten the caliper mounting bolts down. Remove the wheel and card and tighten the mounting bolts to spec (usually 5-6 Nm). Reinstall wheel and spin. Rub should be gone. If you do choddo's paper trick you should see white on either side of the rotor.