Description
The Shimano Ultegra CS-R8101 Cassette brings 12-speed gearing to riders who want drivetrain performance without stepping up to Dura-Ace. Built with Hyperglide+ technology, it delivers faster, smoother shifts even when you’re pushing hard on the pedals — a meaningful advantage on punchy climbs or during sustained efforts in a group.
Available in 11-30T and 11-34T range options, the CS-R8101 suits everything from flat road racing to hilly gran fondos. The 11-34T spread in particular gives you a genuine bail-out gear without sacrificing the tight steps at the top end where sprint and tempo riding happen. Compatibility with both 12-speed and road 11-speed freehub bodies means this cassette integrates cleanly into a range of wheel builds.
Shimano Ultegra CS-R8101 Cassette Specs at a Glance
- Speeds: 12-speed
- Available ratios: 11-30T, 11-34T
- Technology: Hyperglide+
- Freehub compatibility: 12-speed and road 11-speed freehub bodies
- Series: Shimano Ultegra R8100
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