Volvo D13 6 Cylinder Diesel 455 hp Engine, Volvo ATO2612D Automated Transmission, 13200 lb Front Axle, 40000 lb Rears, 53200 lb GVWR, Air Ride Cab, 70 in High Rise Sleeper Cab, 295/75R22.5, Air Ride Suspension, 224 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks