Shimano Ultegra CS-R8101 12 Speed Cassette Size:11-34T Its low-profile design and chain

Its low-profile design and chain stabilization will give them the confidence to choose rougher routes

while tough nylon bristles scrub derailleurs

SPD compatible cleats included

The RaceRocket HP mounts to frame with included bracket

Shimano Ultegra CS-R8101 12 Speed Cassette Size:11-34T Its low-profile design and chainHYPERGLIDE+ cassettes revolutionized off road shifting with its seamless shifts both up and down the gear range. Now it's time for the technology to change road cycling. Even during maximal efforts up a climb or racing a friend, riders no longer need to back off to perform a shift. In any gear, Shimano ULTEGRA R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing HYPERGLIDE FREEHUB bodies. All this while