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When heavy trailers or bed loads make the rear of your truck sag, steering and braking can feel off. These SumoSprings Solo helper springs add up to 1,000 lbs of support at 50-percent compression to keep your ride level and steady when towing or hauling. They help your factory suspension bear the extra weight so your handling stays predictable and your headlights stay aimed where they should.
Every load feels a little different, and these springs adjust automatically. The microcellular urethane compresses easily under lighter loads for a soft, comfortable ride, then firms up as the weight increases to prevent bottoming out. By absorbing bumps and road vibration, the springs make towing or daily driving a lot smoother whether you’re hauling gear or running empty.
When a curve or crosswind pushes your vehicle off balance, each SumoSpring reacts on its own to keep the truck planted. This independent action evens out off-center loads and cuts down on sway and body roll when turning or changing lanes with a heavy trailer behind you. It’s a noticeable difference in control and comfort on highways or uneven roads.
These springs are made from tough microcellular urethane that stands up to abrasion, oils, road salts, and UV exposure. They perform reliably in temperatures from -25 F to 200 F and compress vertically with minimal side expansion so they won’t get damaged in tight spaces. With no air lines or pressure to maintain, they’re completely maintenance-free once installed.
Getting extra support doesn’t have to be complicated. The kit includes two jounce-style springs that replace your factory bump stops using existing mounting points—no drilling required. It’s an easy weekend upgrade that gives you lasting suspension support without adding complexity to your setup.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Claude S.
10/24/2021
Works way better than I expected. Cant believe something so easy to install works so well. Took out the fear of pulling a heavy camper!
Victoria H.
4/1/2025
Glad to hear these improved your hauling experience Glenn! Who doesn't love a smooth ride?
David
5/28/2021
This is a great product for assisting your leader springs. Makes the ride a bit stiffer when empty. Air bags are a better choice, but cost a lot more too. Honestly, if your factory springs cant handle the weight, you need a bigger truck.
Lyle
6/3/2024
They have been great.The ride is great with or without the trailer.No truck squat with the trailer on nice and level.Makes a big difference in towing.Thanks again for the great service and products that you provide.
Sierra K.
6/21/2022
You can also take off some of the washers so that they do not hit as soon.
Mark R.
10/24/2020
Excellent still working very well would recommend to anyone looking to boost the suspension in the rear of your truck15 Silverado
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Steve N.
11/14/2020
Excellent