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When heavy trailers or bed loads make the rear end sag, these SumoSprings Rebel helper springs step in to keep things level. At 50-percent compression, they provide 3,000 lbs of rear axle support to steady steering and braking under load. They help absorb bumps and shocks so your ride stays comfortable and controlled when towing or hauling.
The 2-piece spring setup connects at the top and bottom but separates when unloaded, so you get full suspension travel and a smoother ride on rough or uneven terrain. When the load comes on, the springs meet to provide firm support that keeps your suspension from bottoming out. It’s a smart design that gives flexibility for both work and everyday driving.

These microcellular urethane springs automatically adjust stiffness based on weight. Light loads compress easily for soft engagement and less bounce, while heavy loads can compress up to 80 percent for strong support. The result is a level stance, even weight distribution, and better handling no matter what you’re carrying.

Each spring works on its own to cushion off-center loads and reduce body roll through corners. This independent movement helps the vehicle stay planted when winds, curves, or uneven ground try to throw it off balance.
Made from durable microcellular urethane, these springs resist damage from oils, road salt, and UV rays while working in temperatures from -25°F to 200°F. They expand and compress vertically with minimal side movement so they fit safely in tight spaces. There’s no air pressure to monitor or lines to leak—just reliable load support with a simple bolt-on installation and hardware included.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Ellen: Hey, everybody. I'm Ellen here at etrailer.com, and we're going to be taking a quick look at the SumoSprings Custom Helper Springs for the rear axle of your vehicle. Now, these are going to be a really great solution to alleviate a lot of issues that people have whenever they're towing anything heavy with their vehicle, putting maybe a trailer on the back of your truck, a fifth wheel, or pulling a camper behind with a hitch ball. What these are going to do is they're going to help to support your suspension. They're going to give you some better handling overall, and they come in two parts.So unlike airbags that are going to do similar things, these aren't going to hamper the travel of your suspension. That can be kind of one of the drawbacks to getting an air suspension or airbags in your vehicle.
Not only that, but they also require a lot of maintenance to keep them up. So these are pretty much maintenance free. Once you put them in your truck, you don't have to ever worry about them again. They're just there. They do their job.
But what they will do is they have a progressive compression. So the more weight you put on them, the stiffer they get to push back against that. So it kind of dials it in for your load. So you don't have to worry about it being too stiff. If you're just going down the road and hitting a normal pothole or anything like that and not towing, it shouldn't be a really stiff or fast engaging type of feel.This also makes it easier for whenever you're getting any kind of maintenance done on your vehicle.
So that's another drawback to airbags is that sometimes if you are getting maintenance done, your suspension needs to hang and that can actually damage the bags. So you don't have to worry with this. They already come separate on their own. So they're a really easy way to alleviate a lot of issues with body roll or rough ride on your vehicle while you're trying to tow.So let's look at them a little closer and talk about what comes in the kit. You're going to get a spring for either side.
And, again, this is for the rear axle of your vehicle. There'll be an axle strap that's going to go around that and then the hardware to get everything installed. So there's no cutting or drilling required with this. It just goes right in place and should be a pretty easy install. Might take a little bit of time to just kind of get in to the spot and get everything in place where it needs to go.The springs themselves are made out of a micro cellular urethane. So that's really durable. It's able to withstand any kind of damage from oils road salts, UV rays, it really doesn't cause any issues with these guys. They're able to work from extreme temperatures of negative 25 degrees Fahrenheit up to 200 degrees Fahrenheit. So it really doesn't matter where you're using these, they should be up to the task for that. Also, something that's nice about these is that there's not a lot of lateral expansion, so they're not going to pancake out. They should stay relatively compact. So even as things are pushing down on them, they're not going to cause any issues with your existing suspension or with your wheels and rub on anything.There's also, again, no worries about any kind of maintenance. You don't have to run any air tubes to these and worry about those. So even if you're going to be going off road with these, you can rest assured that they're not going to hamper how far your suspension can travel. Just going to be these two pieces that bolt on, kind of as a replacement for your jounce bumpers, so they are a jounce style spring, and they are made in the USA. This is a fit for the 2011 through the 2016 Ford F 250 and F 350 Super Duty and for the 2014 through '16, that's for the two-wheel drive.Now, if you want to get a kit for these, that would be matching for the front, you can also find that here at etrailer.com. That would be one that would fit those same year models as well. So that'll kind of alleviate some of the other issues that you might be having. The weight capacity that these can take at 50% compression is 3,000 pounds. That does not increase your overall weight carrying capacity, so keep that in mind. It doesn't increase your payload or anything in your vehicle. So you always want to go off of the manufacturer's recommended weight and never exceed that. They are covered by a limited lifetime warranty.And that's really about all there is to it for our look at the SumoSprings Rebel Helper Springs. I hope this video has been helpful in deciding if this is the right solution for you. We do have a lot of other accessories here for towing and all kinds of stuff. So check it out. Thanks for watching.
Ratings & Reviews

Claire H.
10/14/2026
Glad to hear it! I'm a big fan of SumoSprings because they're so easy to install and don't require any maintenance after. What kind of trailer are you hauling?

Rick
4/15/2026
The springs work great. After a year in service, they are like new. We use this truck as a rental equipment delivery truck. We pull a 26ft gooseneck tilt deck trailer that is 16K rated. The ride is great and the springs handle the load nicely with no sag when loaded. We have added these springs to all 6 of our 1-ton delivery trucks.

Katrina B.
5/23/2023
These will not fix an already sagging suspension. These are designed to help support suspension but leaf springs need to be replaced they will not fix that much sag. I would recommend using some airbags, like part # F2703, in place of Sumo Springs. You will need a compressor, like part # F2097 for the airbags.

Steve
5/16/2021
Outstanding!

Randy
5/22/2022
Product is excellent. The springs really reduced the squat I used to have in my truck when I hooked up my fifth wheel camper. Actual reduction in squat was around a 2 inch change. This also keeps the nose of the truck from rising in response to the rear sag I used to have, which makes the overall handling of the total rig a bit better as well. Also, the ride, while connected, is noticeably smoother and feels more stable while driving in stout crosswinds, which we frequently enjoy, here in Oklahoma.
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Jesse M.
9/10/2026
Hey Steve. Thanks for the feedback. This Rebel kit is designed for vehicles carrying variable heavy loads, so some contact at unloaded ride height can be normal depending on the application. If this is a dually, keep in mind this particular kit is intended for commercial applications only, where earlier engagement helps support the heavier loads these trucks regularly carry. I’d still verify the brackets and spacers match the instructions, but the Sumos contacting before the factory overloads does not automatically indicate a problem with this setup.