143150 lb GVWR, Air Ride Suspension, Air Brakes, S/A Pin-On Booster Axle, Aluminum Outer Wheels, 245/70R17.5 Tires *THIS LOT SOLD WITH: 2008 - XL SPECIALIZED XL24FA S/A BOOSTER s/n: 4U3S005178L009126 c/w: Pin-On, Air Ride Suspension, Aluminum Outer Wheels, 245/70R17.5 Tires;