Hi new here figured I'd give this one a try, seems like mtbr is populated by beamer driving self obsessed snobs. Anyway I have a 21 spd trek 4900 that I just built, problem is when chain is on 7 small ring rear and 3 large front the chain skips 1 or 2 teeth on the rear sprocket when I start off. I adjusted the rear derailer forward to allow more links to contact teeth but this did not help.
Nothing against BMW or owners just tired of self-absorbed a$$holes.
Nothing against BMW or owners just tired of self-absorbed a$$holes.