Campagnolo Super Record 11 Crankset One Color, 170mm 34/50 Arm Material: carbon fiberArm Length: 170 mm, 172.5 mm, 175 mmBottom Bracket: BB Type: BB Threading: Bolts: Rings: 2Spindle: Compatible Components: Weight: 628 gRecommended Use: road racingManufacturer Warranty: Bolt Circle Diameter: 135 mmChainring Sizes: