Strange sound with my crankset
Hey all, just recently i've been hearing a strange sound coming from my crankset. Every time i peddle there is a noise that sounds like the breaks are scraping against the wheel. However, i have checked out the breaks and they are not hitting the wheel at all. The sound doesn't happen all the time, only when i'm peddling hard, if i don't push too hard on the peddles however, the sound usually disappears. i repacked my bearings to to see if that was the problem, but it didn't help. None of the balls are chipped and their are no strange grooves or scratches on the races. Everything seems to be in perfect order. . . i'm stumped.
The sound is driving me insane.