This is the Firestone Ride-Ride 2621 Rear Air Helper Spring Kit designed to provide adjustable air load support for 2013-2025 Ford Transit 250 and 350 single rear wheel (SRW) models. Installed between the vehicle frame and rear leaf suspension, it allows you to inflate or deflate the air springs to accommodate varying loads while keeping the vehicle level.
Constructed with a pair of rubber, convoluted air springs, this kit includes all necessary components: mounting brackets, hardware, air lines, and separate manual inflation valves. It operates over an air pressure range from 5 psi minimum up to 100 psi maximum, and is engineered for a load-leveling capacity of up to 5,000 pounds per set when properly inflated.
For real-world use, this means improved ride comfort under heavy load, reduced rear sag, better steering and braking control, and reduced wear on headlights and tires. The Ride-Ride 2621 makes hauling, towing or loading your Transit safer and more comfortable, allowing side-to-side or front-to-rear adjustment to keep the vehicle balanced even with uneven loads.