Firestone 13900 Ride-Rite Air Helper Spring Kit

The Firestone 13900 Ride-Rite Air Helper Spring Kit is a premium suspension upgrade designed to eliminate sag, sway, and bottoming out when towing or hauling heavy loads. Engineered by Firestone Industrial Products — a trusted leader in air spring technology — this kit works alongside your existing factory suspension to provide a stable, level ride under demanding conditions.

Key Features:

• Bolt-on installation designed to work with OEM suspension components
• Adjustable air pressure from 5 to 100 PSI for a customizable load-leveling experience
• Heavy-duty rubber air springs built for long-lasting durability and performance
• Helps prevent rear-end sag when towing trailers, fifth wheels, or hauling cargo
• Maintains proper headlight aim and improves overall vehicle control under load
• Compatible with single-path or dual-path inflation systems
• Includes all necessary hardware and brackets for installation

The Firestone Ride-Rite system is a popular choice for truck and SUV owners who frequently tow or carry heavy payloads. By adding a controlled air cushion between the frame and axle, it dramatically improves stability and comfort without sacrificing ride quality when the vehicle is unloaded.