The Deore M7200 12-speed cassette cog tooth profiles improve shifting under high load while remaining smooth fast and durable. It is also Micro Spline compatible and built with steel and alloy cogs to optimize weight and durability. Its 10-tooth cog supports smoother transitions between gears and a wider 10-51t range making it ideal for pretty much any use from XC or enduro racing to all-day adventures on the trails. The M7200 touts robust shifting performance in a stronger lighter package.Micro Spline compatible design features smaller and more widely distributed splines limit cog damage on lightweight aluminum freehubsLargest cog uses aluminum while the others use steel to strike the ideal weight-strength balanceHyperGlide+ provides fast and smooth shifting even under load (requires HG+ chain - sold separately)Shaves weight from the previous model through strategic cog material reductionAnodized aluminum spider arm reduces weightCompatible with all Micro Spline freehub bodies