CASS Ultegra R8101 12 spd 11-34T

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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