CS-R8101 Ultegra Cassette Type:12 Speed or your phone close at

or your phone close at hand

Precision ramps and chamfers for rapid chain movement

loved by our customers

The result is a light and fast product which allow to have fun also when tackling burlier descents and gnarlier terrain

Grand Sport Race features a proven racing tire contour for responsive handling and secure grip

CS-R8101 Ultegra Cassette Type:12 Speed or your phone close atThe uninterrupted shifting experience of the Shimano Ultegra CS R8101 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. FEATURES: Refined 12 step gear