Shimano Dura-Ace CS-R9100 Cassette 11-Speed Size:11-25 Through extensive Computational Fluid Dynamics

Through extensive Computational Fluid Dynamics and Win Tunnel testing

and blood flow loss

Doesn’t victory smell sweet

Take the performance and Body Geometry ergonomics of our high-end road shoes

the new carbon plate is 20g lighter than the S-Works 7

Shimano Dura-Ace CS-R9100 Cassette 11-Speed Size:11-25 Through extensive Computational Fluid DynamicsDURA ACE 11 Speed Road Cassette Sprocket CS R9100 DURA ACE 11 Speed HG EV Road Cassette Sprocket Using a carbon fibre and alloy spider and five titanium sprockets, the DURA ACE R9100 cassette provides accurate shifting and light weight to the most discerning road cyclists on the planet. Features Rider tuned gearing Lightweight CFRP & Alloy spider arm, 5 titanium sprockets