9-speed, aluminum lockring, High Tensile steel sprocket, Shimano HG-M (MTB) compatible, black The suffix HT stands for High Torque, it is specially reinforced for high-torque e-bikes The performance of your cassette determines the quality of your riding experience. That's why we at our Grad.HT cassettes make no compromises on functionality and durability: the sprockets made of particularly strong High Tensile steel are specially reinforced in the HT (= High Torque) version for the high torques of E-bike mid-motors. This means that our Grad.HT cassettes offer greater durability compared to conventional cassettes, which you benefit from through higher mileage (i.e. longer maintenance intervals) and longer superior shifting performance. Our Grad.HT cassettes have special ramps that ensure faster and smoother shifting, so you don't have to think about shifting processes and can concentrate on cycling. This cassette is suitable for 9-speed gears and has a gradation of 11-42 teeth. Number of teeth 11, 13, 16, 20, 24, 28, 32, 36, 42 Freewheel body HG-M, MTB Large sprocket 42 inch Main color black Small sprocket 11 inch Cassette mount System compatibility 9-speed Type/kind Article Replaceable sprocket partially