E13...No question. Quietest, strongest, smoothest, flawlessest. lol Best there is. If your bike has an external BB (RaceFace X-Type) and no ISCG, there's a few mods to get it to work (same with any CG) but nothing major. My advice, let your local bike shop slap it on and go ride. E13.McGRP01 said:E.13 DRS!!! I have one on my Dawg and it's bomb-proof!!