Shimano Ultegra R8100 Hollowtech II Crankset 50-34T 170mm RGroup_93D0895493AFB6A298BDD3561FB23A92D297A283 Sizes: 32/36 and 36/40 mm

Sizes: 32/36 and 36/40 mm (sold separately)

The Crankbrothers Front 9mm Standard Endcap Iodine allows for easy conversion of your Crankbrothers wheels to fit different frame spacings

it provides 100% UV protection (UV400) with light transmission of 89%/24% for the Photocromic Lens

Heavy duty construction that's built to last

Shimano Ultegra R8100 Hollowtech II Crankset 50-34T 170mm RGroup_93D0895493AFB6A298BDD3561FB23A92D297A283 Sizes: 32/36 and 36/40 mmThe Shimano Ultegra R8200 Hollowtech II Crankset offers smooth and precise shifting with quicker operation and increased crank arm variations to suit all riders. Its updated HollowGlide structure provides a lighter build, better power transfer, and a more efficient tooth design. Drawing from extensive research and World Tour experience, Shimano delivers a seamless riding experience. The Ultegra Di2 drivetrain is slick shifting, efficient, lightweight,