Cummins ISL9 8.9 L Diesel 300 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Allison 6-Speed Automatic Transmission, Differential Lock, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, 11R22.5 Front Tires, 11R22.5 Rear Tires, Spring Suspension, 207 in Wheelbase, 159 in Cab to Axle, 281 in Cab to End of Frame