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SuperSprings are a self-adjusting helper spring that will increase the level load capacity of your vehicle. Super Springs have a patented roller system that will with no rattle or noise and best of all, they do so automatically. A leaf spring suspension will flex when a load is applied and eventually flatten out and make your pickup or suv sag, bottom out, or sway. If you have SuperSprings overloads installed, this is the exact time the patented system will engage and provide your vehicle with level load support from SuperSpring rear helper spring kits.