Shimano Ultegra CS-R8101 12 Speed Cassette - 11-30T

- Lightweight 12-speed HG+ 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
- For use with 12-speed chains