SumoSprings Compress up to 80% of original height with full memory rebound and stretch 50% of their height.
They are maintenance free, do not leak air, and do not require airlines or compressors.All SumoSprings are manufactured from proprietary closed microcellular urethane designed to suit numerous applications. SuperSprings SumoSpring Air Helper Spring Set - SSR-129-40-2 SumoSprings are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and comfort. SumoSprings Rear for Ford F-250|F-350;2WD models;Sold as a pair (left and right);Maintenance-free;Enhances load carrying ability;2600 (lb) capacity at 50% compression;Reduces and stabilizes sway;Improves overall driver control and ride comfort;Compress up to 80% of original height with full memory rebound;Two-piece unit attached on top and bottom using separate male and female pieces allows unlimited travel;Progressive spring rate with superior damping properties;Made from patented micro-cellular urethane;Will not leak or rupture;Never load any vehicle beyond the manufacturer's GVWR;California Residents: WARNING SumoSprings are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications.