The shimano ultegra cs 6800 is a lightweight 11 speed hg ev cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance even under the most demanding gear changesthe hyperglide ev sprockets have been designed to reduce weight with improved teeth shaping to provide accurate shifting and reduced wear the wide gear range is designed to meet the demands of all types of riderkey features compatible with hg ev chains lightweight 11 speed 11 32t rigid alloy