Originally Posted by
am8117
Because I'm almost afraid to ask here what's the pitch difference (or what to call it) in 2x10 and 2x11 FC ... if only these were somewhere specified ... as in .. chainrings are thinner ... or they are the same but more densely spaced. I had no difficulties using 10sp FCs with 9sp drivetrains but I always said to myself there's zero chance the chain can get stuck inbetween the chainrings because after all the chain plates were thicker than the FC was specced for. I have no experience the other way.
There is none. They are 100% compatible. The pitch is the same on all drivetrains, all speeds. The only difference is 1/8" (track/bmx) and 3/32" (road/mtb).