Let me start by saying that this bike is incredible. It handles great, is responsive, transfers energy great, climbs...I could go on and on. I have the full XTR setup, 2x10 and I have dumped my chain at least 15 times now. It only dumps when I am coasting and hit a rough section. I am not pedaling when this happens. It dumps off the big chain ring between the frame and the small chainring. I took it to my LBS and they could not fix the problem. Due to being scared of seriously damaging my bike (The chain dumps have already put a good thrashing to my frame) I finally just said screw it and let the bike sit because I got tired of messing with it. Back to the Giant I went. Anyone know of a solution, it's depressing watching such a great bike just sit I really want to ride it and not be scared of destroying it.