text: im a hardened mountain biker what should i buy a specialized enduro or a trek session 77?   trek/gf had a major problem with their chainlines a few years back, they didn't make them to the specs required by shimano in order to ensure perfect chainline running.  so on smaller frames (where the differences were more noticible) they had big problems. the only reason the world cup mtbers went ok is because the trek mechanics filed off the bb shell.  my point is go for specialized. they look way cooler too :)