Product Description
Product features
- Shimano Ultegra CS-R8101 cassette, compatible with 11 and 12 speeds and HyperGlide/HyperGlide+ freehub bodies.
- HyperGlide+ technology for smooth and fast gear changes even under high pedalling load.
- Available in two versatile sprocket ranges: 11-30T (291 g) and 11-34T (345 g) to suit different race profiles.
- Aluminium spider and steel sprockets offering a great balance of lightness and durability.
- 12 speeds with precise spacing for optimised acceleration and re-acceleration.
Shifting performance
The Ultegra CS-R8101 features HyperGlide+ technology, which enables very quick and stable gear changes both when shifting up and down. This design minimises efficiency loss during shifts under heavy load, ideal for intense efforts in groups or competition.
Compatibility and versatility
Designed to be compatible with Shimano 11- and 12-speed freehub bodies, the CS-R8101 integrates easily into modern road drivetrains. The two offered ranges (11-30T and 11-34T) cover a wide spectrum of uses, from rolling profiles to tougher climbs.
Construction and weight
The cassette pairs steel sprockets for wear resistance with an aluminium spider to reduce weight while maintaining stiffness. The stated weight is 291 g for the 11-30T version and 345 g for the 11-34T version.
Gear ratios and choice
Two sprocket sets are available to meet cadence and gearing needs: 11-12-13-14-15-16-17-19-21-24-27-30T or 11-12-13-14-15-17-19-21-24-27-30-34T. The close spacing on the smaller sprockets favours smooth transitions, while the 34T version offers extra gearing for steep climbs.
Recommended use
Intended for road cycling and demanding sportive use (road, duathlon, triathlon, cyclo-cross), the Ultegra CS-R8101 delivers the responsiveness and reliability sought by competitors and demanding riders who want precise, high-performance shifting.
