Shimano CS-M9101-12 Cassette - 12-Speed 10-51t Black/Gray Micro Spline CheckoutSpec= 1.5 x 172mm Durable heat-dissipating CNC machined aluminum

Durable heat-dissipating CNC machined aluminum construction

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Shimano CS-M9101-12 Cassette - 12-Speed 10-51t Black/Gray Micro Spline CheckoutSpec= 1.5 x 172mm Durable heat-dissipating CNC machined aluminumShimano CS M9101 12 Cassette 12 Speed 10 51t Black Gray Micro Spline. Shimano XTR CS M9100 cassette features better chain retention and ground clearance. This cassette is built with a strategic application of aluminum titanium and steel materials for an optimal blend of weight savings rigidity and durability. Compatible with Shimano Hyperglide+ chains Hyperglide+ technology offers better chain engagement stronger retention and smoother pedaling for