The Shimano Ultegra R8100 and its seamless shifting allows the rider to concentrate fully on climbs, sprints and overcoming their own limits without having to worry about the next shift. Sprockets with more teeth ensure higher drive efficiency and ensure compatibility with SHIMANO 11- and 12-speed FREEHUB freewheel bodies.
HYPERGLIDE+ cassettes set new standards for off-road shifting thanks to seamless upshifts and downshifts across the entire gear range. It's about time this technology was applied to road bikes as well. You can now switch gears even when using the greatest amount of force on climbs or in a direct duel with an opponent. In all gears, the ULTEGRA R8150 drive train ensures maximum efficiency thanks to larger teeth and ensures compatibility with existing HYPERGLIDE FREEHUB freewheel bodies. Despite their expansion to 12 gears, ULTEGRA CS-R8100 cassettes set new standards for road bike shifting systems.

- Faster, more seamless shifting at maximum pedal load
- Revised 12-speed gradation for first-class efficiency and optimal acceleration in all situations
- 34T option expands the possibilities for professional use
- Compatible with new 12-speed and 11-speed road bike FREEHUB freewheel body
- Gradation: 11-12-13-14-15-17-19-21-24-27-30-34T
- HYPERGLIDE+
- compatible chain: 12-speed HG
- Weight according to the manufacturer: 345g

(Translated with Google Translate)