Volvo D16H550 6 Cylinder 16.1 L Diesel 550 hp Engine • Engine Brake • Volvo ATO3112D 12-Speed Automatic Transmission • Differential Lock • 14600 lb Front Axle • 46000 lb Rears • Mid Roof Sleeper Cab • Aluminum Wheels • 11R22.5 Front Tires • 11R22.5 Rear Tires • Air Ride Suspension • 225 in Wheelbase • Air Sliding 5th Wheel • Dual Fuel Tanks