FC-R8100 Ultegra 12-speed double chainset

Shimano Ultegra HollowTech II 12-Speed Chainset

The Shimano Ultegra HollowTech II 12-speed chainset delivers a perfect mix of light weight, stiffness and smooth shift performance for enthusiasts and racers alike. The HollowGlide hollow chainring boosts rigidity and sharp shifting, even under load, while tooth profiles are optimised for 12-speed HG chains to improve contact, efficiency and power transfer.

Cold-forged HollowTech II crank arms maximise stiffness with reduced weight, and wide gear pitch spacing increases clearance for frames with 135/142 mm O.L.D. A range of chainring sizes and crank lengths lets you tailor the build to your riding. Designed to pair with a HollowTech II bottom bracket (sold separately), the integrated system uses wider bearings and a larger axle for enhanced stiffness, smooth rolling and long-lasting durability.