Shimano Ultegra CS-R8101 / R8100 12 Speed Cassette Size:11-30 or crushing that elusive PR

or crushing that elusive PR

These are properties that can be beneficial in sports performance

Built-in battery for Shimano Di2 groupsets

• The option to run lighter weight tires if desired

Shimano Ultegra CS-R8101 / R8100 12 Speed Cassette Size:11-30 or crushing that elusive PRThe uninterrupted shifting experience of the ULTEGRA 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. Take your road bike performance to the next level with the Shimano Ultegra CS R8100 12 Speed Cassette. Designed for Shimanos latest generation 12 speed road