SHIMANO Ultegra CS-R8101 Di2 Silver Cassette 12-Speed

SHIMANO Ultegra CS-R8101 Di2 Silver Cassette 12-Speed 

*** For Di2 and Mechanical Shifting Systems ***

The Shimano Ultegra CS-R8101 Cassette utilizes Hyperglide+ technology allowing for better shifting under load so it is no longer necessary to ease up on the pedals when making a shift. For simple compatibility, Shimano 12 speed road cassettes fit on the same hub body as 11 speed road cassettes. This allows riders to use their current wheels for 12-speed. Shimano also managed to add the extra sprocket without increasing the total weight of the cassette.

Refined 12-step gear combination provides maximum efficiency and accelerating performance
Compatible with 12 speed and 11 speed freehub bodies
Faster, seamless shifts under maximum pedaling load

Type: Hyperglide+
Compatible Chain: HG12-Speed
Color: Silver
Weight: 291g (11-30T) 345g (11-34T)

Original Shimano parts guarantee that all components work perfectly for optimum performance and maximum safety and longevity.