Shimano Cassette Ultegra CS- R8101 12 Speed 11-34

What Is It?

The Shimano CS-R8101 Ultegra 11-34T 12-Speed Cassette is a premium Hyperglide+ (HG+) road cassette engineered for the Shimano Ultegra R8100 12-speed groupset. Designed to deliver exceptionally fast, smooth, and precise shifting, it provides seamless gear changes even under heavy pedalling loads.

The 11-34T gear range offers an excellent balance of closely spaced gears for maintaining an efficient cadence on the flats while providing a generous low gear for steep climbs. Built with nickel-plated steel sprockets mounted on two lightweight aluminium spider arms, the cassette combines durability, stiffness, and reduced weight for performance-focused road and endurance cyclists. It is compatible with Shimano's HG L2 12-speed road freehub, allowing it to fit modern Shimano 12-speed road wheelsets.