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Heavy loads can make the rear of your vehicle sag, throwing off steering and braking. These SumoSprings Solo Custom Helper Springs add up to 2,800 lbs of support at 50-percent compression, helping your suspension stay level when towing or hauling cargo. They keep your ride height steady so front tires maintain better contact with the road for safer handling, steering control, and correct headlight aim.
Not every trip carries the same weight. These microcellular urethane springs compress easily with light loads for a softer, more comfortable ride, and stiffen progressively as weight increases. That means less bounce and sway when loaded and a smooth ride when empty—all without needing to adjust air pressure or monitor lines.
When crosswinds or uneven roads try to push you around, each spring works independently to stabilize the vehicle. This helps control body roll on sharp turns and keeps the ride balanced even when loads are off-center. The result is a more controlled feel through corners, driveways, and highway gusts.
Made from high-density microcellular urethane, these springs resist abrasion, oil, salt, and UV damage while performing in temperatures from -25 F to 200 F. They compress vertically with minimal side expansion so nearby parts stay protected. With no air lines or pressure to maintain, they’re a simple, no-drill upgrade that adds lasting support without extra upkeep.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
I put these on a 2013 Jeep JK (not lifted) that tows a 3000 lb trailer in rough terrain; Total game changer.
These replaced the anemic factory stops (which had completely disintegrated) and make it impossible to 'bottom out' on the dips and holes that use to beat up the suspension. I got nearly all of my vertical travel back and the vehicle now sits almost level under high tongue load.
They go on pretty easy. I suggest sliding in one side, and then using a wooden dowel and hammer to pop the other side in the stock receiver cup.
Highly recommended. These are a MUST if you are towing a trailer (with a medium sized SUV) of any significant weight or if you just want to be able to bounce hard without bottoming out your suspension. I am likely going to get the front suspension version now as well.
Wish I knew these existed sooner.
A great investment!
Easy install, great performance, no maintenance. What could be better.
These work out very well. The customer was happy. Not hard to install was a plus.
Easy order. Quick delivery. Easy instal lation.
Product was easy to install and definitely helped reduce body roll and sway when being passed by semi’s or transitioning over curbs.
Definately noticed the ride difference just leaving the driveway entering the street. Less sway and more solid feel of a ride. Installation was a bit trying to begin with, getting all the right combinations of sockets, extentions, ratchet in the tight area. Once that was figured out, the passenger side was completed in 10 minutes.
Very easy to install. Improve suspension considerably. Melissa was a pleasure to deal with when ordering.
I have a set of SumoSprings on my Super Duty. Adding these to my Transit was a no brainer.
Install went without a hitch. I'm ready to take them out for a test run.
As always, I needed a host of devices to set up our new Toad, and etrailer was the perfect choice! Lot of product, in stock, for a decent price, and shipped quickly! HIGHLY recommend
Easy to install. Used on a custom campervan that is loaded slightly less than GVCW. The Sumo springs, with their progressive dampening characteristics, removed the sway of vehicle and improved the general handling. Highly recommend.
Significant improvement in the handling in windy and rough road conditions. Increased height of back of my 2017 Fuse 23A by 1 to 1 1/2 inch.
I added the springs to help with the addition of another a/c on top at rear of my unit.
Very pleased and installation was straight forward and relatively easy. Took about 1 hour to complete.
Gary
6/30/2021
The increased handling and height gain are helpful on all the road conditions I have encountered. The ride is a little more stiff than the original factory suspension but the improvement of handling and reduction of sway is worth the small increase in the stiffer ride. Would recommend for all Winnebago Fuse owners
These sumo springs did the job. I'm an electrician and our vans are heavly loaded when set up. I put them on a Ford 250 transit van to bring it back up to stock height after the van was loades with shelving, ladder racks, tools, and parts. The ride is great and the install was very easy. I would buy them again.
The sumosprings make a noticable improvement in handling of my RV.
Brooke M.
12/11/2024
Sounds like theyre doing their jobs well and thats great to hear! Were you on a the road a lot this summer?
I think this is the best option for my 2023 Ford Transit Trail 350. It has somewhat restored the leaf spring arc. The way I think it should be.
Installed easily once I got the correct small extensions so I could get them back out after tightening. With both spacers on my 21 Thor Gemini it sits about 1/4” off axle plate. Helps significantly with body roll.
Definitely improved the ride... Much firmer cornering and handling... Super easy installation but note that due to the clearance, you will need to put the deep socket in first, then the short extension & then connect the ratchet. Also, I reached above the spring and hand threaded the long bolt before using the wrench.
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Chris
1/6/2024
Works exactly as it should. Stabilizes my Ford transit350.