Shimano Deore XT CS-M8100 12-Speed Cassette | 10-45T | MICRO SPLINE | HYPERGLIDE+
Shimano Deore XT CS-M8100 12-Speed Cassette | 10-45T
Fast, precise shifting and race-ready performance at the heart of Shimano's legendary XT drivetrain.
The Shimano Deore XT CS-M8100 cassette delivers the smooth, reliable shifting that has made XT the benchmark for serious mountain bikers. Featuring Shimano's advanced HYPERGLIDE+ technology, the cassette allows lightning-fast upshifts and downshifts—even while applying full pedaling power on technical climbs and demanding trails.
The 10-45T gear range offers closer gear spacing than the 10-51T version, making it an excellent choice for riders who value tighter cadence changes, quick acceleration, and efficient power transfer. Whether you're racing cross-country, riding marathon events, or tackling fast flow trails, the 10-45T cassette delivers responsive performance across a wide range of terrain.
Constructed from a combination of lightweight aluminum and durable steel sprockets, the XT cassette provides an outstanding balance of weight, durability, and long-term shifting performance.
The CS-M8100 is designed exclusively for MICRO SPLINE freehub bodies and is fully compatible with Shimano 12-speed mountain bike drivetrains.
Key Features
- Genuine Shimano Deore XT 12-speed cassette
- 10-45T gear range with close-ratio gearing
- HYPERGLIDE+ shifting technology
- Smooth shifting under full pedaling load
- MICRO SPLINE freehub compatibility
- Optimized balance of weight and durability
- Ideal for XC, trail, marathon, and all-mountain riding
Gear Range
- 10T
- 12T
- 14T
- 16T
- 18T
- 21T
- 24T
- 28T
- 32T
- 36T
- 40T
- 45T
Technical Specifications
- Brand: Shimano
- Series: Deore XT
- Model: CS-M8100-12
- Generation: M8100
- Speeds: 12-Speed
- Gear Range: 10-45T
- Compatible Chain: Shimano HG 12-Speed
- Freehub Compatibility: MICRO SPLINE
- Shifting Technology: HYPERGLIDE+
- Finish: Anodized
- Shimano Product Code: ICSM8100045
- UPC: 192790443836
Why You'll Love It
- Closer gear spacing for smoother cadence transitions
- Fast, confident shifting even under heavy pedaling loads
- Excellent balance of lightweight performance and durability
- Perfect for riders who don't require the ultra-low 51T climbing gear
- Legendary Shimano XT reliability for thousands of trail miles
Compatibility
- Shimano 12-speed mountain bike drivetrains
- MICRO SPLINE freehub bodies only
- Compatible with Shimano XTR, XT, and SLX 12-speed systems
- Designed for Shimano HG 12-speed chains
Before You Buy
- This cassette requires a MICRO SPLINE freehub body.
- This listing is for the 10-45T version.
- Compatible with Shimano HG 12-speed chains.
- Not compatible with Shimano HG or SRAM XD/XDR freehub bodies.
The Shimano Deore XT CS-M8100 10-45T Cassette offers professional-level shifting performance with tighter gear spacing for riders who prioritize cadence control, efficiency, and speed. It's an outstanding choice for XC racers, marathon riders, and aggressive trail riders looking for the perfect balance of performance, durability, and value.