Designed for top-level mountain bike racing, the Shimano XTR CS-M9100 / CS-M9101 12-speed cassette offers unrivalled transmission performance in terms of smoothness, lightness and precision. A true benchmark for the XTR groupset, it is aimed at demanding cross-country, marathon and enduro riders.

Thanks to Hyperglide+ technology, this cassette offers ultra-fast, smooth gear changes, even under full load, significantly improving pedalling control and efficiency. Its advanced design combines aluminium, titanium and steel to offer an excellent compromise between durability and reduced weight.

Available in 10-45 or 10-51 gearing, it offers a wide range of developments for all types of terrain, from technical climbs to rolling sections. Compatible only with Micro Spline freewheel bodies, it guarantees perfect integration with Shimano 12-speed drivetrains.

The M9101 version has been slightly upgraded (in particular with regard to certain design elements), while retaining the same overall performance as the M9100.

Technical specifications :

- MTB cassette Shimano XTR CS-M9101 12 speed
- Cassette body Shimano Micro Spline: reduced weight and 10-tooth start
- Hyperglide+ tooth profile: increased speed and smoothness
- 3 aluminium sprockets
- 4 steel sprockets
- 5 titanium sprockets
- Spacing: 10-12-14-16-18-21-24-28-32-36-40-45 /
10-12-14-16-18-21-24-28-33-39-45-51T
- Weight: 357 grams (10-45)
- Brand: Shimano

Note: only compatible with a Microspline freewheel body

Key features

• Hyperglide+ technology: fast gear changes even under load
• Premium construction (aluminium, titanium, steel): lightweight and durable
• Wide development range (10-45 / 10-51)
• Micro Spline compatibility only
• The benchmark for MTB racing

FAQ - Cassette Shimano XTR M9100 / M9101

What's the difference between the M9100 and M9101?
Performance is equivalent. The M9101 mainly makes minor design adjustments with no major impact on operation.

Is this cassette compatible with all hubs?
No, it requires a Shimano Micro Spline freewheel body.

Which gearing should I choose?

• 10-45: tighter spacing, ideal for XC
• 10-51: maximum versatility and easy climbing

Can it be used with single and double chainrings?
Yes, it is compatible with 1x12 and 2x12 drivetrains Shimano.

Is it suitable for intensive use?
Yes, it's designed for competition and extreme conditions.