Cat C15 6 Cylinder Diesel Engine, Air Conditioner, Engine Brake, Eaton Fuller 13-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, 50000 lb GVWR, Air Ride Cab, 68 in Mid Roof Sleeper Cab, Aluminum Wheels, 11R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 301 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Auto Lube