Machine description: Cummins 6 Cylinder 6.7 L Diesel Engine, Requires Diesel Exhaust Fluid, Automatic Transmission, 7000 lb Front Axle, 13500 lb Rears, 225/70R19.5 Front Tires, 225/70R19.5 Rear Tires, Spring Suspension, 1... more info about the 2021 Ram 5500.