Cummins ISC 6 Cylinder 8.3 L Diesel Engine, Automated Transmission, 12000 lb Front Axle, 21000 lb Rears, 33000 lb GVWR, Air Ride Cab, Aluminum Wheels, 295/75R22.5, Airliner Air Ride Suspension, 212 in Wheelbase, 146 in Cab to Axle, 190 in Cab to End of Frame