Detroit Series 60 6 Cylinder 14.0 L Ultra Low Sulfur Diesel Engine, 2006 US EPA Label, Engine Brake, Meritor MD-15610A Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor RT-40-145 Drive Axles, 3.58:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, 295/75R22.5, Airliner Air Ride Suspension, 230 in Wheelbase, Dual Fuel Tanks