Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-34t, Silver

The Shimano Ultegra CS-R8101 road cycling cassette in 11-30T delivers 12-speed performance for riders building or upgrading to Shimano's current-generation road drivetrain. The tighter 11-30T range keeps gear steps closer together for criteriums, road racing, and fast group rides where cadence consistency is a priority. Hyperglide+ tooth profiling supports smooth, precise shifts under load in both directions. Compatible with Shimano 12-speed road groupsets and requires a 12-speed compatible freehub body.