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Heavy trailers, campers, and bed loads can make the rear of your vehicle sag and throw off your steering and braking. These SumoSprings Solo Custom Helper Springs add up to 2,800 lbs of support at 50-percent compression to help level your ride and steady your handling. By taking some of the strain off your factory suspension, they keep your front tires planted for better traction and braking control when you’re towing or hauling.

Every road surface feels different, and the microcellular urethane design reacts to it. With lighter loads, these springs compress easily for a soft, comfortable ride. As your cargo weight increases, they compress by as much as 80 percent to add the right amount of stiffness and support. That progressive response keeps bumps from jarring the cab and helps absorb shocks before they reach you.
When a curve or crosswind tries to push you around, each SumoSpring reacts on its own to keep that side steady. This independent action helps reduce body roll during sharp turns and compensates for off-center loads, so your truck feels more planted and predictable even when it’s loaded down or moving through uneven terrain.
These high-density urethane springs are made to handle real-world abuse. They resist oils, road salts, and UV rays that can wear out other materials and perform reliably from -25°F to 200°F. Their vertical compression design minimizes side expansion, so they fit safely around tight suspension components without rubbing or binding. And with no air lines or pressure to maintain, they stay ready for every trip without any ongoing upkeep.
The no-drill installation means you can bolt them in place using simple tools without modifying your suspension mounts. Each kit includes two jounce-style helper springs built specifically for the rear axle setup, giving you reliable load support without extra tubing or air management systems to maintain.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews

Doug
10/19/2023
Terrible I took them off couldnt stand to ride in the truck it was so ruff,wishing I could get my money back


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?



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?


Gwendolyn Y.
5/20/2026
Looks like you were about to head off somewhere fun, Chad!

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!

Richard
2/12/2026
No issues. Towed a 27 Airstream around 4k miles & its all good.


Mike
7/31/2025
The springs are working exactly as expect. I have need up to the mountains numerous times and to Monerary to the Sea Otter bike fest. They have reduced the body roll and helped keep the truck stable on the mountain roads or when loaded down for camping. Im very pleased I added these Sumo Springs to my Tacoma.


Lazer S.
9/16/2025
Glad to hear they are helping, Cory! If you are feeling them going over speed bumps, I think taking one of the spacers out is a good idea. Especially if that is happening when you are unloaded. Speaking of which, what are you towing?


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Lowell J.
2/16/2021
Just like the front...still kickin