Cummins M11 6 Cylinder Engine, Engine Brake, Eaton Fuller 10-Speed Transmission, 40000 lb Rears, Viesa Evaporative Sleeper Air Conditioner, 295/80R22.5 Front Tires, 11R22.5 Rear Tires, 8-Bag Air Ride Suspension, 5100 mm Wheelbase, GVM 24.1 t, GCM 50 t