SHIMANO XTR CS-M9100 M9101 Cassette, 12S ,10-51T brake caliper It might look normal from

It might look normal from the outside

Reach Adjust to personalize fit for more hand sizes

Climb mountains

which also saves weight

SHIMANO XTR CS-M9100 M9101 Cassette, 12S ,10-51T brake caliper It might look normal fromXTR 12 Speed HYPERGLIDE+ MTB Cassette Sprocket With its BEAM SPIDER construction, the XTR M9100 12 speed cassette shaves weight while increasing SHIMANO's MTB gearing range another gear. Using SHIMANO's new MICRO SPLINE freehub body and HYPERGLIDE+ tooth profile, these 10 45 and 10 51T cassettes deliver the best MTB shift experience on offer FEATURES Definitive shiftingLet you pedal continuously while shiftingIncreased acceleration by reducing inertia