Originally Posted by
Cadfael
With some mechanical disc brakes... one pad should always be 'just' touching the rotor... you should hear a slight scraping as you turn the wheel. It should not be enough to actually slow you down.... just the lightest of touches.
Originally Posted by
Wordbiker
I disagree.
Given a true rotor, mechanical brakes should still not rub the pad. Minimal clearance should be set for the static pad, but rubbing is unacceptable.
I could go either way. The rub typically happens when I'm off the bike, adjusting the brakes. I adjust until I hear the slightest rub. When I'm on the bike, the weight displaces the bike somewhat, eliminating the rub. I like my brakes nice and tight, not sloppy where I must squeeze the trigger through a wide range of motion.