Shimano XT CS-M8000 11-Speed Cassette

The Shimano Deore XT CS-M8000 is the benchmark for high-performance 11-speed drivetrains. Designed to deliver precise, crisp shifting under heavy load, it combines steel and aluminum cogs on dual anodized aluminum spiders to keep weight down without sacrificing long-term durability.

While built for aggressive mountain bike trails, the CS-M8000 is also a go-to favorite for gravel and all-road builds. It pairs seamlessly with Shimano GRX 11-speed rear derailleurs (such as the RX812 1x derailleur), making it an ideal choice for gravel riders seeking wide-range gearing for steep climbs and loaded bikepacking trips.

Key Features

• Rhythm Step Gear Progression: Optimized tooth steps ensure predictable cadences and fluid shifts up and down the block.

• Hybrid Material Construction: High-wear steel cogs handle the brunt of the torque, while lightweight aluminum cogs on the bailout positions cut rotational mass.

• Lightweight Dual Spider Design: Reduces weight and flex while spreading torque loads across the freehub to prevent notch damage on softer alloy freehub bodies.

• Cross-Discipline Compatibility: Works natively with Shimano MTB 11-speed setups as well as Shimano GRX 11-speed gravel groupsets.

• Standard HG Freehub Mounting: Fits directly onto conventional 8/9/10/11-speed HG splined freehub bodies.

Available Gear Ratios

• 11-40T: Tight, rhythm-focused progression ideal for 2x setups or flat-to-rolling 1x gravel routes.

  • Progression: 11-13-15-17-19-21-24-27-31-35-40T

  • Weight: ~411g

• 11-42T: The gold standard for 1x gravel (GRX RX812) and trail 1x/2x drivetrains, balancing gear range with smooth jumps.

  • Progression: 11-13-15-17-19-21-24-28-32-37-42T

  • Weight: ~434g

• 11-46T: Maximum bailout range for steep 1x singletrack, heavy cargo, or wall-like gravel ascents.

  • Progression: 11-13-15-17-19-21-24-28-32-37-46T

  • Weight: ~437g

Technical Specifications

• Series: Shimano Deore XT M8000
• Speeds: 11-Speed
• Freehub Type: Standard Shimano/SRAM HG Spline
• Compatible Chains: HG-X11, LINKGLIDE, or 11-speed road/gravel chains
• System Compatibility: Shimano MTB (Deore, SLX, XT, XTR) & Shimano Gravel (GRX 11-Speed)