The new shimano cs r8000 ultegra 11 speed cassette is a lightweight hg ev cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance even under the most demanding gear changes shimano cs r8000 ultegra 11 speed cassette features hyperglide ev sprockets have been designed to reduce weight with improve teeth shaping providing accurate shifting and reduced wear wide gear range to meet the demands of all types of rider for use with 11 speed hg ev chains