Ultegra CS-R8100 Series 12-Speed Cassette cadence/speed sensor Sealed cartridge internals for quick

Sealed cartridge internals for quick replacement

Secure round base is compatible with most tubeless rims and a perfect fit for all Stan’s BST and BST-R rims

6-Series alloy

comfort and traction

it offers top protection against impacts

Ultegra CS-R8100 Series 12-Speed Cassette cadence/speed sensor Sealed cartridge internals for quickThe 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