Still new in the box, part number SSR201. Bought to install on my truck for my camper and found I don't need them. Opened the box to read the directions but never took anything else out and didn't install. Looks like these go for $589. Will sell for $535 plus shipping.

Email if you are interested:

martyn@cebridge.net




SuperSprings Vehicle Suspension - SSR-201
These polyurethane springs are in constant contact with your vehicle'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.
Features:
Microcellular polyurethane springs upgrade your rear suspension for better support whether loaded or unloaded
Help to level your vehicle, prevent sagging and reduce bottoming out
Attach to both the frame and the axle to deliver constant suspension assistance
Springs progressively adjust according to your cargo - the more you load onto your truck, the stiffer they become
Compress by as much as 70 percent to help support heavy loads
Extend by as much as 30 percent for a more comfortable ride when you aren't carrying cargo
Durable springs withstand the elements
Work in temperatures from 14 F to 200 F (-10 C to 93 C)
Resist damage caused by abrasion, oil, salt and UV rays
Fit in smaller spaces
Springs expand and compress vertically - minimum expansion to the sides means that they aren't damaged by nearby mechanical parts and that they fit into tighter spots
Bolt on easily above your existing leaf springs - no drilling required
Require no maintenance - no tubing or air pressure to monitor or adjust like air springs
Save money
Extend the life of brakes, tires and the factory suspension
Less expensive than air spring systems
Made in the USA


Specs:
Includes: 2 polyurethane springs, custom-fit brackets and hardware for installation
Capacity: up to 10,000 lbs
SumoSprings will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's weight limit for your vehicle.
Designed to work with a suspension system that is in good working order
2-Year limited warranty



SumoSprings work constantly to enhance your vehicle'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 vehicle 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 vehicle 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.


SSR-201 Sumo Springs Rear Kit





This Product Fits The Following Vehicles
1999 - 2010 GMC Sierra 2500
2007 - 2007 GMC Sierra Classic 2500
2007 - 2007 GMC Sierra New Body 2500
1999 - 2010 Chevrolet Silverado 2500
2007 - 2007 Chevrolet Silverado Classic 2500
2007 - 2007 Chevrolet Silverado New Body 2500
2001 - 2010 GMC Sierra 3500, Pickup
2007 - 2007 GMC Sierra Classic 3500, Pickup
2007 - 2007 GMC Sierra New Body 3500, Pickup
2001 - 2010 Chevrolet Silverado 3500, Pickup
2007 - 2007 Chevrolet Silverado Classic 3500, Pickup
2007 - 2007 Chevrolet Silverado New Body 3500, Pickup