Shimano Deore CS-M5100-11 11-Speed Cassette 11-42T

The Shimano Deore CS-M5100-11 cassette brings the proven durability and shifting precision of Shimano's Hyperglide technology to 11-speed mountain bike drivetrains. With a wide 11-42T gear range, it delivers the low gearing needed for steep climbs while maintaining close spacing for smooth cadence control on rolling terrain. Unlike many aftermarket cassettes, the CS-M5100-11 is engineered as a complete system with Shimano's 11-speed MTB rear derailleurs, ensuring reliable performance from the first shift to the last.

Highlights

• Wide 11-42T range for versatile MTB gearing
• Hyperglide sprocket profiling for fast, positive shifts
• Durable steel construction with nickel-plated finish
• Compatible with standard Shimano HG freehub bodies
• Optimized for Shimano 11-speed MTB drivetrains

In daily use

On the trail, the CS-M5100-11 shifts crisply under load, thanks to carefully contoured tooth profiles and shift ramps. The 42T largest cog provides a bailout gear for technical ascents, while the 11T top cog allows high-speed descending. The cassette's steel spiders reduce weight without sacrificing stiffness, and the nickel plating resists corrosion in wet, muddy conditions. Riders will appreciate the consistent performance across all 11 gears, whether grinding up a fire road or sprinting out of a switchback.

Full specifications

• Series: Deore
• Rear speeds: 11-speed
• Gear combination: 11-42T
• Cog teeth: 11-13-15-17-19-21-24-28-32-37-42T
• Smallest cog: 11T
• Largest cog: 42T
• Compatible chain: HG-X11 (11-speed)
• Freehub compatibility: Shimano HG spline
• Intended use: Mountain bike (MTB)
• Shifting technology: Hyperglide (HG)
• Cog material: Steel
• Spider arm material: Steel
• Lock ring material: Steel
• Finish: Nickel-plated
• Number of carriers: 1
• Recommended derailleur: Shimano 11-speed MTB (e.g., RD-M5100-SGS)

Final note

For riders seeking a reliable, wide-range 11-speed cassette without the premium price of higher-tier groupsets, the Shimano Deore CS-M5100-11 is a proven choice that delivers consistent performance mile after mile.