Cat 6 Cylinder Diesel Engine, Manual Transmission, 18000 lb Front Axle, 40000 lb Rears, 58000 lb GVWR, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Dual Steering Boxes, Double Frame, Hendrickson RT/RTE Series Spring over Walking Beam Suspension, 190 in Wheelbase, 104 in Cab to Axle, 219 in Cab to End of Frame