CS-R8101 Ultegra Cassette Type:12 Speed Grand Sport Race features a

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

This everyday performance skirt sports a two-part construction with the upper skirt layer playfully concealing an integrated padded liner

Precision ramps and chamfers for rapid chain movement

loved by our customers

steep descent thanks to excellent heat dissipation

CS-R8101 Ultegra Cassette Type:12 Speed Grand Sport Race features aThe 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