Shimano XT CS-M8100 Cassette

This cassette requires a Shimano Micro Spline freehub body. If your current wheelset uses a standard HG (HyperGlide) or SRAM XD driver, you will need to swap your freehub body to a Micro Spline version before this cassette will fit.

While it is designed to work best with Shimano's 12-speed chains for optimal shifting performance, it is generally compatible with most other 12-speed mountain bike chains. However, for the smoothest shifting and longest component life, sticking with a Shimano XT or compatible Hyperglide+ chain is recommended.

The 10-tooth smallest cog allows for a harder gear for fast descents, while the 51-tooth largest cog provides an incredibly low gear for steep, technical climbs. This wide range gives you the versatility to tackle varied terrain without needing to swap chainrings.

No, this is a 12-speed cassette and requires a dedicated 12-speed derailleur and shifter to function correctly. The spacing between the cogs is specific to 12-speed systems, so it will not index properly with an 11-speed drivetrain.

The XT cassette sits in the middle of Shimano's lineup, offering a balance of weight, durability, and cost. It uses a mix of steel and aluminum cogs to keep weight down while maintaining the durability needed for aggressive trail riding, whereas XTR is lighter but more expensive, and SLX is heavier but more budget-friendly.