Model: CH9HB Nominal Load(Kg): 9000 Wheel Tread(mm): 1860 Max. Troque Output (N.m): 24000 Housing Spec.(mm*mm): 135*145*14 Ratio: 3.909, 4.10, 4.556, 4.875, 5.125, 6.83 Drum Brake Spec.(mm*mm): 400*220 Stamping Welding 400*180 Casting Disc Brake Spec: 19.5" Axle Weight(Kg): 600(Drum Brake)500(Disc Brake) Matching Model: 9~10.5M Bus.