With the Shimano XTR 12-speed cassette CS-M9101, the plastic spacer, which minimizes the noise development, is firmly glued on at the back and is not included separately as was the case with the predecessor CS-M9100. This model is still available in two versions: 10-45 Z for cross-country racers, where every gram counts and even gradation is desired, and 10-51 Z for trail and enduro riders, who want a wide range arrives and who want to excel even on the steepest ramps.

- Area of use: Cross Country
- Switching steps: 12-fold
- Sprocket material: steel, titanium, aluminium
- Freewheel Compatibility: Micro Spline
- 10-45: Rhythm Step version with 450% coverage
- Better acceleration due to the lower moment of inertia and weight of the Beam Spider construction
- Faster shifting without interrupting the pedal stroke
- Micro-spline construction to engage the freewheel body
- Graduation: 10-12-14-16-18-21-24-28-32-36-40-45 t
- Weight according to the manufacturer: 357g

Scope of delivery:
- 1 x Shimano XTR CS-M9101-12 cassette
- 1 x Shimano aluminum end ring

(Translated with Google Translate)