Shimano CS-R8101 Cassette 11-30 ULTEGRA 12-speed Size:11-30T Radiator Fin: Provides long pad

Radiator Fin: Provides long pad life and less fade by cooling technology

waterproof and dust proof

designed to preserve resources and diminish disposables

For cyclists and runners

Shimano CS-R8101 Cassette 11-30 ULTEGRA 12-speed Size:11-30T Radiator Fin: Provides long padThe uninterrupted shifting experience of the ULTEGRA 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. HYPERGLIDE+ 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