Shimano CS-M5100-11 Deore 11-speed cassette 11-51T

Mountain bikers tackling steep, technical climbs need a drivetrain that delivers reliable shifting and a wide gear range. The Shimano CS-M5100-11 Deore cassette answers that call with an 11-51 tooth spread, giving you the low gears to spin up punishing grades without sacrificing high-end speed on descents. Built for 11-speed HyperGlide drivetrains, this cassette is a workhorse upgrade for trail, enduro, and e-MTB riders.

Key specifications

• Speed: 11-speed
• Gear range: 11-51T
• Cog combination: 11-13-15-18-21-24-28-33-39-45-51T
• Material: Steel cogs and spider
• Freehub compatibility: Shimano HG (HyperGlide)
• Shifting technology: HYPERGLIDE
• Recommended chain: HG 11-speed
• Series: Shimano DEORE M5100
• Color: Silver/Black
• Intended use: Mountain Bike (MTB)

Why choose it

Shimano's DEORE M5100 series brings proven durability and smooth shifting to aggressive trail riding. The steel spider construction keeps weight manageable while maintaining stiffness under load, and HyperGlide technology ensures crisp, precise gear changes even when you're mashing the pedals. The 51T largest cog opens up climbing possibilities that were once reserved for pricier groupsets.

Ideal use cases

• Upgrading a 1x drivetrain for steep mountain terrain
• Replacing a worn cassette on a trail or enduro bike
• Building a budget-friendly 11-speed MTB groupset
• E-MTB riders seeking a durable, wide-range cassette

Good to know

This cassette requires an HG freehub body and an 11-speed chain. It is compatible with Shimano's 11-speed mountain bike rear derailleurs, including the RD-M5100-SGS. For optimal performance, pair it with a DEORE M5100 shifter and derailleur.