I installed my 14b about 750 miles ago totally rebuilt along with Disc brakes. Last night on the way back from a ride I heard what sounded like a rock rubbing on the disc. What I heard was the wear indicator of the pads, the pads are totally gone, grooves being cut on the inboard side of both discs, pads on both sides of both discs are gone. Everything I used was new, nothing rebuilt. WTF over?