5,000-lb Capacity. Ride-Rite air springs enhance your factory suspension for safety and stability when you are hauling heavy loads. They reduce strain on your rear axle, keep your vehicle level, and adjust to load size for a consistently smooth ride. construction material of the fittings may vary. Firestone Ride-Rite Air Spring Basics Firestone Ride-Rite springs are designed to increase safety and reduce the strain on your truck when you are hauling heavy