These polyurethane springs are in constant contact with your GMC Sierra's suspension to significantly reduce sway, prevent sagging and support your existing springs while maintaining a smooth ride. Great for pickups driven with and without a load.
SumoSprings work constantly to enhance your GMC Sierra's suspension. Each bellows-shaped bumper is bolted to two mounting brackets: one attached to the frame and the other to the axle, typically above your existing factory leaf spring. Because each spring is in full contact at the top and bottom of the suspension's travel, the expanding and contracting action of the SumoSprings enhances your ride under all conditions, not just when loaded. Like a shock absorber, the closed-cell foam urethane helps to dampen road vibration for a less jerky ride. These springs also extend the life of your existing suspension, including any aftermarket shocks.
SumoSprings can compress by as much as 70 percent to support a heavy load. This keeps your truck level, helps to prevent sagging and reduces bottoming out. Hauling heavy cargo or pulling a trailer can cause the rear of your GMC Sierra to sag while the front end rises. This means that the rear axle is handling the full weight of the load plus your truck's weight as well. The lighter weight on the front axle means that the front tires make less contact with the road, causing problems with traction, steering and braking. With SumoSprings helping to more evenly distribute the weight of your load, your tires make better contact with the road and your driving control greatly improves. SumoSprings act progressively - the more you load them, the stiffer they become.
These springs also extend in height by as much as 30 percent to allow more movement in your suspension when you're traveling unloaded, making your ride smoother and more comfortable.
SumoSprings expand and compress vertically with minimum expansion to the sides, so they aren't damaged by nearby mechanical parts and they fit safely into tighter spots. The kit is designed to install easily, and the custom-fit brackets bolt onto your GMC Sierra with no drilling necessary.
SumoSprings eliminate the maintenance and higher cost associated with air spring systems. And these polyurethane springs are tough. They resist abrasion, oil, salt and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from 14 F to 200 F (-10 C to 93 C).
These springs are perfect for those who tow on weekends, but who also use their trucks without towing or hauling during the week.
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