10-51t offering provides 510% of range, making it the most versatile cassette in the XTR family The strategic use of steel, titanium, and alloy ensures the CS-M9200 cassette is lightweight and robust enough to provide racer confidence CS-M9200 XTR cassette is compatible with MICRO SPLINE freehub standards Mounts with the use of a special lockring tool TL-LR021 (sold separately) The Shimano XTR CS-M9200-12 represents the evolution of HYPERGLIDE + shifting. New cassette cog tooth profiles improve shifting under high load while remaining smooth, fast, and durable. This cassette is still MICRO SPLINE-compatible and built with steel, titanium, and alloy cogs to optimize weight and durability.