Cummins 6 Cylinder Diesel Engine, Allison Automatic Transmission, 12000 lb Front Axle, 20000 lb Rears, 32000.0 lb GVWR, Air Ride Cab, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 150 in Wheelbase, Dual Fuel Tanks