Shimano XTR CS-M9100 12-speed 10-45 tooth cassette box

After over 27 years of development, Shimano is right back where it all started by bringing the ultimate MTB racing components to the market. Designed to meet the needs of MTB racing at the highest level with unsurpassed performance and a unique ride feel. The new Shimano XTR M9100 series includes the most versatile components for XC, enduro and marathon racing. The Shimano XTR CS-M9100 12-speed cassette with Hyperglide+ technology and new Micro Spline construction and a gradation of 10-45 for XC racers or riders who prefer a tighter gradation between gears or 10-51 teeth with an incredible 510 % range. Note: The cassette is only compatible with the new XTR M-9100 groupset with Micro Spline freehub body.

Made of titanium, aluminum and steel
Better acceleration thanks to the lower moment of inertia and weight of the BEAM SPIDER construction
12-speed drivetrain with high bandwidth or narrow gradation
New climbing aids with HYPERGLIDE+ technology ensure the fastest and most comfortable shifting possible
Micro Spline mount

• precise shifting without interrupting pedaling
• better acceleration due to lower moment of inertia and weight of the Beam Spider construction
• new Micro Spline design for engaging the Freehub freehub body
• Hyperglide+: completely renewed drivetrain system with specially developed chain enables faster shifting, efficient power transmission and unprecedented chain stability; helps riders to master rough trails with confidence - dampens pedal stroke and reduces shifting times by a third (compared to the current HG system)
• Micro Spline: new 12-speed cassettes made it necessary to adapt the cassette hub to make room for the new cassettes and the smaller 10-tooth sprocket; stiffer connection with 23 equally spaced splines at a sawtooth angle; cassette hub body made from aluminum