Campagnolo Centaur Crankset 175 53-39 Aluminum Power-Torque 10 speed~ Bottom Forged aluminum crankarms plus chainrings with Micro Precision Shifting (MPS) in light alloy with anti-friction treatment 8 pin large chainring for faster upshifts Integrated PowerTorque axle sytem requires PowerTorque cups (not included) 738 grams