Shimano's game-changing 12-speed technology finds a value-pricing home with the Deore 12 CS-M6100 Cassette, a lightweight cluster with a wide-range to suit your all-mountain riding style. Engineered with BEAM SPIDER construction, the Deore 12 retains an impressive and race-ready level of stiffness while reducing weight compared to the competition. A 12-speed drivetrain creates a few complications with chain retention and narrowing tolerances, so Shimano improves the experience with Hyperglide for fast and smooth shifts and improved chain retention. Shifting accuracy gives you confidence, and cog engagement is critical to stay on the power and accelerate through obstacles. And Shimano knows that confidence translates into speed.The Deore 12 fits onto your MicroSpline freehub equipped wheelsets to work seamlessly with the 10-tooth cog.