Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-30t, Silver Narrow Heel The construction of the Session

The construction of the Session 95 starts with a Karuba core and adds to it a 5-Axis Carbon Weave that provides ample torsional rigidity

and elastic cuffs and cords for micro adjustments

Constructed with polyurethane

so it'll take an alpine sole or a full touring sole

and weight

Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-30t, Silver Narrow Heel The construction of the SessionThe 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 close for criterium, 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