Shimano CS-M9101 12-Speed 10-45T Silver/Black Cassette

Alloy 5 beam spider carrier with 3 alloy, 5 titanium and 4 chromoly sprockets make this a lightweight, stiff and durable 12-speed micro spline MTB cassette hyperglide+ sprockets have a computer designed tooth configuration with contoured shift gates, resulting in 1/3 faster shift time than current hg cassettes providing seamless, smooth operation even under load 10-45t wide ratio gearing allows a more efficient use of energy through finer cadence control in ever changing trail conditions sprockets are cut away extensively and drilled to further reduce weight without reducing rigidity sprockets use hard anodising and nickel-plated finish for added durability and resistance to corrosion for use only with micro spline freehub bodies alloy cassette lockring for use with Shimano 12-speed sil-tec chains average weight 357g