8-speed, Aluminium Lockring, High Tensile Steel Sprockets, Shimano HG-M (MTB) compatible, black The HT in the name stands for High Torque, it is specially reinforced for e-bikes with high torque. Number of teeth 11, 13, 15, 18, 21, 24, 28, 32 Type item Mount cassette E-bike type ready Freewheel body HG-M, MTB Large sprocket 32 T. Main color black Small sprocket 11 T. Sprockets partially interchangeable System compatibility 8-speed