To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
When towing or hauling a heavy load, sag at the rear can throw off your steering and braking. These SumoSprings helper springs add up to 750 lbs of support at 50-percent compression to keep your ride level and steady. They help your factory suspension handle extra weight, keeping better contact between your tires and the road for safe headlight aim and confident control.
Every load feels different, but these springs automatically adjust. The microcellular urethane compresses easily on lighter loads for soft engagement and a smoother ride, then firms up under heavy weight—compressing by as much as 80 percent—to add more support when you need it. The result is a comfortable, stable ride whether you’re carrying gear or driving unloaded.
Each spring works on its own side of the vehicle to balance off-center loads and cut down on body roll in sharp turns. That means less sway when cornering or driving through crosswinds, and more even handling across uneven terrain. The springs also help minimize bottoming out by cushioning bumps before they reach the chassis.
These helper springs are built to handle real use in all conditions. The microcellular urethane resists oils, road salts, and UV rays, and it performs in temperatures from -25°F to 200°F. Minimal lateral expansion keeps them safe in tight spaces, and with no air lines or pressure to monitor, they stay maintenance-free season after season.
Adding rear suspension support doesn’t have to be complicated. This kit replaces your factory bump stops with two jounce-style springs using a straightforward, no-drill design. You get reliable load support without extra hardware or adjustments—just solid performance every time you hit the road.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
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?
Claire H.
9/2/2026
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.
Gwendolyn Y.
5/20/2026
Looks like you were about to head off somewhere fun, Chad!
Christopher H.
8/4/2026
Happy to hear the # SSR-118-54 was a simple install and is working well for you. This is a great system!
Gwendolyn Y.
4/23/2026
Thanks for the awesome feedback, Jeff! Love hearing that the install was a breeze and that you noticed such a big difference in handling, that’s exactly what you want after the upgrade. Really appreciate you sharing the photos too, it’s always fun to see the comparison.
Gwendolyn Y.
1/8/2026
Glad the Sumos are helping make your loads easier to tow!
Do you have a question about this Vehicle Suspension?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
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?