SHIMANO Ultegra FC-6700-G Crankset One Color, 172.5mm 34/50 Arm Material: aluminumArm Length: 170 mm, 172.5 mm, 175 mmBottom Bracket: not includedBB Type: BB Threading: Bolts: aluminumRings: 2Spindle: Compatible Components: Shimano 10-speedRecommended Use: cyclingManufacturer Warranty: 2 yearsBolt Circle Diameter: (39/53) 130 mm, (34/50) 110 mmChainring Sizes: 39 / 53 T, 34 / 50 T