Rear SuperSprings - 680kgs by SuperSprings International

SuperSprings are a simple, bolt-on, steel helper spring that eliminates rear-end sag and stabilizes sway & body roll. Built from high-grade shot peened steel, this suspension solution allows you to load up without sacrificing your ride quality. The SuperSpring includes a patented roller shackle on each end that allows for self-adjustment as weight is changed. This is particularly helpful as you add water, tools or heavy gear to your vehicle. The SSA28 has an additional load leveling capacity of 1,500 lb.