Campagnolo Centaur 10S Red & Black 39/53 172.5, Power-Torque Crankset 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