Shimano Ultegra 10-Speed Crankset has the HOLLOWTECH II crankset design. Optimum balance of lightweight and rigidity. As the Dura-Ace design, the combination of Hollow Axle and lightweight bottom Bracket design provides smoother rolling, minimal bearing interface for smoother rolling.

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SG-X chainrings. DUAL SIS compatible. Gearing : 53-39T Crank arm length variations :165mm, 170mm, 172.5mm, 175mm Weight : 823g (53-39T, 170mm integrated BB)