Shimano ultegra 6800 cassette chain bundleride shimano and enjoy the benefits of their no compromise attitude shimano use the best materials for unrivalled performance featureslightweight 11 speed hg ev cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance even under the most demanding gear changeshyperglide ev sprockets have been designed to reduce weight with improve teeth shaping providing accurate shifting and reduced wearwide gear range to meet t