Shimano Ultegra R8000 11-Speed Cassette The Shimano Ultegra R8000 11-Speed Cassette helps guarantee you enjoy the best possible performance from your Shimano 11-speed drivetrain. For use with Shimano 11-speed HG-EV chains Lightweight 11-speed HG-EV cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance, even under the most demanding gear changes Hyperglide EV drilled sprockets reduce weight Optimised sprocket tooth profile ensures accurate shifting and reduced wear