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Heavy trailers or bed loads can push your rear suspension past its comfort zone, making steering and braking feel off. These SumoSprings Solo Custom Helper Springs add up to 2,800 lbs of rear axle support at 50-percent compression to keep your ride level and stable when towing or hauling. They cushion bumps, minimize sway, and help your factory suspension carry the extra weight so you feel in control even with a full load.

Whether you’re carrying a light load or a heavy haul, the springs automatically adjust to match. They compress easily for lighter loads to keep the ride soft and smooth, then firm up as weight increases for added stability. That progressive action means less bounce and better control no matter how much gear you’ve got in back.
The closed-cell microcellular urethane springs handle temperature swings from -25 F to 200 F and resist oils, road salts, and UV rays that wear out ordinary rubber parts. They compress vertically with minimal side expansion, so they won’t get damaged by nearby components even in tight spaces. It’s durable support that holds up through seasons of towing and hauling.
Installation is simple with no drilling required—just bolt them in place where your factory bump stops sit. Once installed, there’s nothing to maintain—no air lines, no pressure checks. The one-piece design rebounds fully after heavy compression, working quietly in the background every time you load up or hit a rough stretch of road.
Each spring works on its own to handle side-to-side weight differences. That helps reduce body roll on curves and keeps you steady over uneven terrain or when loading off-center cargo. The result is a more planted feel through corners and better control when your suspension is working hard.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the SumoSprings solo custom helper springs for your rear axle. Now, this is a custom fit part. These are designed to fit the 2014, and newer, Nissan Frontier vehicles. And on a custom fit part like this I always like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle and it'll show if this'll work for your application. Now, these are helper springs which will upgrade your vehicle's rear suspension for improved driver control and comfort, helps keep your vehicle level when you're towing or hauling a heavy load, helps to absorb any bumps and shocks and it'll even help minimize sway.
Now, it does offer progressive load control which means these springs will compress according to the weight of your cargo. So, if you have a lighter load on em the springs will compress easily, at first, for a nice soft engagement and a less bumpy ride and, then, if you have a heavier load the springs will compress by as much as 80% for support. They do work independently from each other to compensate for any off-center loads, reduce body roll during sharp turns, and they are made of a durable microcellular urethane. They're designed to work in temperatures from a negative 25 degrees Fahrenheit to 200 degrees Fahrenheit, and the material will resist damage that can be caused by oils, road salts and UV rays. Does offer minimal lateral expansion.
Basically, these springs will compress vertically instead of to the sides, so they aren't easily damaged when operating in tight spaces. And what's nice about em is they're maintenance free, there's no tubing to run or air pressure to monitor like with air springs. These are very simple, no-drill installation. Does include the two jounce springs with the mounting brackets and the hardware, nice tube of threadlocker to put on the threads when you install it and a nice set of instructions that'll describe how it installs. These parts are made in the USA.
Specs on this, again, the weight capacity at 50% compression is 2,800 pounds. Now, you do need to remember that the SumoSprings will not increase your vehicle's weight carrying capacity. But that should do it for the review on the SumoSprings solo custom helper springs for your rear axle..
Customer Satisfaction Score:
60% were satisfied with this product
40% of customers were not satisfied
Ratings & Reviews

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?



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!

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?



Albert
7/16/2025
Still working like new. So much better than the factory bump stop.

Andrew N.
10/21/2026
Hey John, thanks so much for the detailed response and photos. That really helps other folks on the page. I'm glad install went well and you're liking them! I have these sumosprings on my Nissan Titan and it's a huge upgrade for towing!

Kate F.
7/21/2026
One of my favorite things to recommend Kevin, the feedback is always so great on what a difference they make! What are you mainly towing that needed the extra support?

Mike B.
4/24/2025
Excellent, I also tow a 6x12 cargo trailer which the Sumos do a great job of maintaining a level ride. I also installed Sumos front and rear on my 32 Tiffin motorhome. It utilizes the Ford F53 chassis and I believe they compliment that chassis well. Im definitely a big Sumo fan.
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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?