CAT 3126 6 Cylinder 7.2 L Diesel Engine, 2001 US EPA Label, Allison Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, 33000 lb GVWR, 11R22.5 Front Tires, 11R22.5 Rear Tires, Spring Suspension, 158 in Wheelbase, PTO, 10 ft Long Steel Body, Electric Roll Tarp