Cat 6 Cylinder Diesel Engine, Eaton Fuller Manual Transmission, 22000 lb Front Axle, 46000 lb Rears, 66000 lb GVWR, 445/65R22.5 Front Tires, 11R22.5 Rear Tires, Hendrickson RT/RTE Series Spring over Walking Beam Suspension, 286 in Wheelbase, 26 ft x 96 in Bed