Shimano Dura-Ace CS-R9100, 11-Speed, 11-30T Cassette

DURA-ACE - 11-Speed - HG-EV - Road Cassette Sprocket

Using a carbon fiber 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.