Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-34t Flat Pedals but with substantially more material

but with substantially more material underhand

engineered alongside the R9200 generation with a 45% faster shift speed and a 33% reduction in frontal area compared to the previous generation FD-R8070

The Pirelli Scorpion Enduro R is the rear-specific enduro tire built for full-suspension bikes on aggressive terrain where grip and durability under hard braking and acceleration are non-negotiable

Shimano also makes this BB in Italian threading for frames with 70mm Italian threaded shells

reducing weight and improving chainline precision for clean single-ring builds

Shimano Ultegra CS-R8101 Cassette - 12-Speed | 11-34t Flat Pedals but with substantially more materialWhy Is the Shimano Ultegra CS R8101 the Go To 12 Speed Cassette for Serious Road Riders? The Shimano Ultegra CS R8101 brings HYPERGLIDE+ technology to Ultegra level riders, enabling uninterrupted shifting under full pedaling load whether climbing, sprinting, or accelerating out of corners. Larger driving cogs maximize drivetrain efficiency and the cassette is compatible with both Shimano 11 speed and 12 speed freehub bodies, making it a clean upgrade