Detroit Series 60 6 Cylinder 12.7 L Ultra Low Sulfur Diesel 470 hp Engine, Engine Brake, Manual Transmission, 12000 lb Front Axle, 36000 lb Rears, 48000 lb GVWR, Aluminum Wheels, 11R22.5 Front Tires, 11R22.5 Rear Tires, Low Air Leaf Air Ride Suspension, 227 in Wheelbase, PTO, Air Sliding 5th Wheel