Ultegra CS-R8100 Series 12-Speed Cassette cadence/speed sensor 6-Series alloy

6-Series alloy

it offers top protection against impacts

Double wall design

whilst easy roll-up velcro ends keep your bag neat and tidy

contoured at rear

Ultegra CS-R8100 Series 12-Speed Cassette cadence/speed sensor 6-Series alloyThe uninterrupted shifting experience of the Shimano Ultegra CS R8100 12 speed cassette range lets you climb, sprint, or cruise without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12 speed freehub bodies. Shimano HYPERGLIDE+ technology is integrated to provide seamless shifts both up and down the gear range. Refined 12 step gear combination provides