Cummins 6 Cylinder Diesel Engine, Air Conditioner, Cruise Control, Engine Brake, Spicer 10-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, Flat Top Sleeper Cab, 11R22.5 Front Tires, 11R22.5 Rear Tires, Air Ride Suspension, 207 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks