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When the back end starts to sag from a trailer or heavy cargo, these SumoSprings Solo helper springs step in with up to 1,800 lbs of support at 50-percent compression. They keep your vehicle level so your steering, braking, and headlight aim stay right where they should be. Whether you’re hauling tools, gear, or towing something heavy, the springs help your factory suspension stay balanced and under control.
Rough roads and heavy loads don’t have to mean a harsh ride. The microcellular urethane material in these springs compresses easily for lighter loads and stiffens up as weight increases. That progressive load control smooths out bumps and cushions shocks while still giving firm support when you need it most. The result is a steady, more comfortable ride on any trip.

When curves or side winds try to push your vehicle around, each spring works independently to keep both sides planted. This reduces body roll and helps control sway so the vehicle feels more solid through corners, uneven terrain, or when you’ve got an off-center load in the back.
These helper springs are made from durable microcellular urethane that holds up from -25 F to 200 F. They resist oil, salt, and UV damage so they won’t crack or wear out easily. Since they don’t use air lines or tubing, there’s no pressure to monitor—just install them once and go. Their vertical compression minimizes side expansion so they fit safely in tight spaces without rubbing against other components.
Getting extra load support doesn’t have to be complicated. These one-piece jounce-style springs mount directly in place of factory bump stops with no drilling required. Each pair upgrades your rear axle suspension for better handling, less sway, and fewer bottom-outs every time you load up or tow.
Ratings & Reviews

Heather A.
8/12/2026
Wow thank you for the glowing review Randall. It sounds like once you got them installed they are working out great. That sunset is gorgeous, where were you in this photo?


Lazer S.
5/13/2026
Glad to hear the install wasn't too bad, Michael! Definitely let us know how the ride is once you take it out for a drive! What are you using your Van for? The tires look pretty beefy.

Claire H.
9/1/2026
That is the beauty of SumoSprings! Super easy to install and once they're on you can forget they're there! Are you planning on towing something with your Jeep that you want extra support for?


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Todd
8/25/2023
A must have if you tow & haul to full capacity as I do .