Cummins ISM 6 Cylinder 10.8 L Diesel Engine, 21053 Engine hrs, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, 315/80R22.5 Front Tires, 295/75R22.5 Rear Tires, Hendrickson RT/RTE Series Spring over Walking Beam Suspension, 248 in Wheelbase, 22 ft x 96 in Bed