System engineered for use with the SHIMANO ULTEGRA R8000 groupset the R8000 cassette is available in a wide range of road & mixed surface ratios. It is compatible with HG-EV & HG-X11 chains. Lightweight 11-speed HG-EV cassette with rigid alloy sprocket carrier for reduced weight & better shifting performance even under the most demanding gear changes Hyperglide EV sprockets have been designed to reduce weight with improve teeth shaping providing accurate shifting & reduced wear Wide gear range to meet the demands of all types of rider For use with 11-speed HG-EV chains