I got a Specialized Hardrock Pro nothing stock but the frame.Last year I changed the cranks and bb, cranks are Race Face Evolve DH and the bb is RF XC 68/113. I changed them because of this clunk in the rotation of the crank in the same spot all the time and now it's back again. I also have a new chain, front and rear deraileurs, pedals, rims and hubs. My ques. is is this clunk likely the bb again? I've heard some crappy stuff about the RF bb, any suggestions? I just purchased a new Giant XTC frame and am swapping alot of the hardrock parts and don't want the same probs. Any help is appreciated, thanx