Cummins ISX15 6 Cylinder 15.0 L Diesel 550 hp Engine, 2013 US EPA Label, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, Differential Lock, 13200 lb Front Axle, 40000 lb Rears, 53200 lb GVWR, Aluminum Wheels, 11R24.5 Front Tires, 11R24.5 Rear Tires, Air Ride Suspension, 190 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks, Hour Meter Reads 15301