FSA K-Force Light Compact Crankset (175-mm 34/50T 10 Speed) Hollow carbon arms with UD weave Ceramic Mega MegaExo bottom bracket bearings for minimum drag AL7075 chainrings are compatible with SRAM, Shimano and Campagnolo 10-speed drivetrains, including Dura Ace 7900 147mm Q-factor 596g