Shimano Ultegra 6700 Ultegra 10speed cassette 11 28TLightweight 10 speed cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance, even under the most demanding gear changes Hyperglide 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 Weight 208 grams (11 23 teeth)