Shimano CS-M8100 XT 12-Speed 10-51t Cassette

12 gears, better than a dozen donutsThe Shimano Deore XT CS-M8100 12-speed cassette is optimized with wide range and close step gear combinations for mountain bike excellence.Shimano 12-speed XT cassette delivers a wide range with stealthily quiet shifting.Shift ramp designs provide fast and smooth shifts by Hyperglide+ technologyLight and stiff construction reduces cassette inertiaFaster acceleration and increased chain security10T lowest sprocket realized by new freehub body constructionFeatures Micro Spline body with smaller and more widely distributed splines