Recently purchased a 2012 R3 Team. I've examined some of the forum topics on this matter in depth, and am seeking confirmation of what I think is correct; there are some sharp cats on these forums, so I have no doubt that someone like Hutch or d_1234 might be able to assist . . .
I will be running 2012 Ultegra Di2 shifters and derailleurs, and most likely a SRAM PG1070 cassette.
Case 1: I have a 2012 SRAM Red (black) BB30 crankset on my current frame. Ideally, I'd like to switch this to the R3, as it would allow me to run a variety of chainrings for the variety in terrain I ride and race. As I understand it however, this crankset is a no-go, as the axle is too short to fit the BBright . . . in this case, my best option amongst the SRAM cranksets would be the S900, is this correct?
Case 2: I can pick up an Ultegra 6700 crankset at a decent price. I could fit this to the BBright, but would need to use an adapter (like the one manufactured by Rotor for this purpose); does anyone know whether using a 24mm crankset with a 30mm adapter leads to any appreciable difference in stiffness or power transfer?
Thanks in advance.