The CS-R8000 is the suitable cassette for new Shimano Ultegra 11-speed group.
The new Ultegra R8000 series is taking our rider-tuned philosophy to the next level, with an extensive range of components for mechanical shifting, electronic shifting (Di2) and time trial / triathlon.
-Compatible chain: HG-EV 11-speed, HG-X 11-speed
-Spider arm: Carbon / Aluminum
-Lock ring: Aluminum