The Shimano Ultegra CS-R8101 Hyperglide+ 11-34Z 12-speed cassette enables seamless gear shifting. The rider can concentrate fully on climbs, sprints or enjoyable cruising. Sprockets with more teeth ensure greater drive efficiency and ensure compatibility with SHIMANO 11- and 12-speed FREEHUB freewheel bodies.
HYPERGLIDE+ cassettes set new standards for off-road gear shifting thanks to seamless upshifts and downshifts across the entire gear range. It's time for this technology to be used on road bikes too. Even when you're exerting maximum effort on climbs or in a direct duel with an opponent, you can now shift gears. In all gears, the ULTEGRA R8150 drivetrain ensures maximum efficiency thanks to larger teeth and ensures compatibility with existing HYPERGLIDE FREEHUB freehub bodies. Despite their expansion to 12 gears, ULTEGRA CS-R8100 cassettes set new standards in road bike gear shifting systems.

- Revised 12-speed gear ratio for first-class efficiency and optimum acceleration in all racing situations
- Faster, smoother shifting under maximum pedal force
- Compatible with new 12-speed and 11-speed road bike FREEHUB freewheel body
- Application: racing bike
- Gear levels: 12-speed
- Material: steel
- Pinion nickel-plated
- suitable for electronic and mechanical circuits
- Gradation: 11-12-13-14-15-17-19-21-24-27-30-34Z
- Weight according to manufacturer: 345g (11-34Z)

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