These Shimano sprockets are suitable for all 12-speed cassettes that use MicroSpline technology. This applies to all Shimano 12-speed Deore, SLX, XT, and XTR cassettes. When purchasing this product, you receive the 10-tooth and 12-tooth sprockets. Suitable for: M9100, M8100, M7100, M6100 12-speed cassette. Product Description Replacement sprocket for Shimano XTR CS-M9100 and CS-M9101 12-speed Cassettes The Shimano sprockets for CS-M9100 and CS-M9101 are original spare parts for the XTR 12-speed cassettes with gradations of 10-45 or 10-51. These are the first four sprockets with 10, 12, 14 or 16 teeth. The 10- and 12-tooth version is only available as a set. All sprockets are made of steel. Technical Information:Teeth:10 t + 12 t, 14 t, 16 tGearing:12-speedMatching Gradation:10-45, 10-51Material:steelCompatibility:CS-M9100-12CS-M9101-1210-12 t also suitable for CS-M8100-12, CS-M7100-12, CS-M6100-12 (other material)Models:10-12 tooth: Type:B + DManufacturer Number:Y-1X498030 14 tooth: Type:CManufacturer Number:Y-1X414000 16 tooth: Type:CManufacturer Number:Y-1X416000Contents:14 tooth and 16 tooth Version: 1 x Shimano XTR 12-speed Sprocket 10-12 tooth Version: 2 x Shimano XTR 12-speed Sprocket Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com