Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-30t, Silver USB-C rechargeable The ultra-fine heating elements diffuse

The ultra-fine heating elements diffuse constant heat throughout the bottom of the foot for even warmth

which is user-friendly and performs well even in low temperatures

providing precise steering and excellent traction

5 mm of adjustment for different boot sole lengths and a DIN adjustment of 4-10

while the back features a stretch mesh for added breathability

Shimano Ultegra CS-R8101 Cassette - 12-Speed, 11-30t, Silver USB-C rechargeable The ultra-fine heating elements diffuseThe 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