To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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
The Sumo mount had to be slightly modified on the drivers side (removed a 1/2" by 1/2" chunk of the plate) with a grinder to get it to fit on my 2022 f350 4x4. I contacted the manufacturer prior to making the modification. They did not have an issue. The Sumo reduced truck squat (approx 3/4") allowing the truck to ride level with a trailer (8k hitch mount and 17k gooseneck). When you hit a pothole, the impact felt in the truck was jarring and caused the truck to become unstable. The Sumo eliminated this problem. I chose the blue over the yellow after watching a video on etrailer about ride comfort. I added front Sumos after I installed the rear Sumos. The rear provided the a more noticeable improvement. I chose Sumos over air bags because they eliminated air leak maintenance and air pressure adjustments depending on the load.
They do what they were intended to do - reduce the effects of slightly overloaded factory springs.
Much softer landing when towing and hit a large dip or bump on highway.
Make towing easier and doesn’t affect daily driving.
Awesome ride feel. Easy installation all accept for one bolt that is almost impossible to get tight even with multiple wrench angles. Overall with instructions provided it was a fairly easy install.
Install was easy and loaded ride is improved.
Unloaded ride is terrible. It's so stiff that I'll likely remove and purchase a different product. I called Sumo Spring twice and was not able to reach anyone. I also left a message (2 days ago) and no one returned the call. I was calling for advice or return. The 30 day money back guarantee is useless when you can't reach the manufacturer.
The sumo shocks arrived faster than was told. Fantastic products and great customer service! Nicole who took my order was great! Thanks again Nicole you are exceptional in the customer service dept. at Etrailer. Second time ordering from them out standing company and great employees, You Rock!!!!!
Just put these on our 2014 F350. We have a 40’ fifth wheel and on a 400 mile trip. So far so good!
Install was easy. Took about 2 hours start thru cleanup.
The truck is very bouncy now unloaded. I think the money is better spent on air bags.
Adding a pair of SumoSprings to the rear axle of our 2015 F250 did little to help level the vehicle when hauling 500 to a 1000 lbs of feed or other materials. When pulling a bumper pull tandam trailer with a UTV, tractor, etc.,these springs did not hold the pickup level. We have since replace the leaf springs with OEM parts and all is better. The SumoSprings is a very good idea however did not solve our concern and probably should have saved the cost and replace the leaf springs first. Please note that this F250 does not have a goose neck hitch and it is rare to be overloaded. We use a one ton for those loads. Thanks.
Very easy install and product worked great. Helped most with leveling my truck while loaded with my camper. Body roll was still there but these definitely reduced it. Would definitely recommend this product.
nice improvement when 5th wheel is hooked up. maybe half inch ride height improvement. bumps and potholes are dampened nicely, not eliminated but not harsh and smoothed as should be.
The installation went very well. The ride seemed smooth.
I haven't had the springs under load, yet. I'm sure they'll perform as expected. I was not able to adjust the driver's side springs so that they align correctly. (see pic). The bottom spring does go into the top spring, but it's off enough that over time it will be an issue. Passenger side is spot-on! I have a 2024 F350 Tremor
took about 2 1/2 hours to put them on. Love them!! Trailer sits level and truck still has it's proper angle to the road!
With the new Sumo Springs my Sprinter is an amazing highway cruiser. Drives like a dream! It's a little rough on potholes, but overall a great purchase.
Ride is great unloaded. They don’t touch until you load the truck with a little weight. On a light trailer 16ft or 20ft car hauler they just touch. The ride may be a little stiffer in the rear since there isn’t much weight to keep them down or the bounce down. But it’s not bad at all. Hauling a heavy load where they get compressed the load is much more stable and the truck hauls the heavy loads MUCH better. Cheaper than air ride. No lines to run. No worry to inflate or deflate. I give them 10/10. Very nice product. If you run light loads more than heavy I would go with the blue or yellow versions. I have the 5k sumos on a 2018 Ram 3500 4x4
100% satisfied.
Still too new for me to review how the product works, but in terms of installation, I had a lot of issues with installation on my 2015 Ford F150. Everything I saw made it sound easy for self install by one person, but was pretty tough self install for me. I'm not an expert on vehicles, but generally pretty handy and I had trouble doing it by myself and took at lot of time.
Difficult parts were attaching the upper mounting bracket to the frame, and getting the bolt through a washer and into a mounting piece that I had to insert into the frame
Couple of notes. My truck is a 4x4 and the instructions said to mount the upper bracket in the bottom holes for 4x4's, but that was not possible as it wouldn't fit. After talking to manufacturer, they said it was ok to mount in the the upper holes that was supposed to be for 2wd models.
The instructions don't mention using lock tight on all nuts, but I had one the the sides come off and lost some pieces. After getting a warranty replacement, the manufacturer said to use lock tight, even though it wasn't noted on instructions man. They said in newer instructions, it adds that, but that wasn't included in the product I received
Hoping I will like the ride when I connect and use on my trailer and will reserve judgement till then
I wish I would have put on an air ride system instead. When I put my light (1750lb.)truck camper on my F250 truck, the back of the truck saggs. Not happy! I am sure the product is okay, just not what I wanted.
It’s a fantastic product and shipping was right on time. Thank you so much etrailer.
Just Installed my Sumo Rear Springs. They went in real easy on my Dodge Ram 3500. The thing that took the most time on the install was jacking up the frame 3-4" to make enough space between the axle base and top of frame to slip in the entire lower and top sections of the Sumo Springs. Once I did that, I narrowed that space by letting the frame down a little but not all the way. Just enough to catch the receiving spring and leaving a half inch gap between the two sections. This allowed me to easily rachet the bottom u-clap without a problem and keep good alighment. I know I'm going to love this product once I hitch up. No more 2' drop in the rear end once hooking up to my 15k 5th wheel. These springs are stout but no so stout I'll beat the hell out of my body when hunting the rutted roads of the great North West. Thank you Jessie for your expertise and steering me toward the perfect application to meet my pulling and off-road needs.
I put a small leveling kit in my 2500hd Silverado. I noticed afterwards towing my excavator or dump trailer I was getting some rear sag when I had my trailers loaded heavy. I considered doing air bags for the rear. Instead I installed the sumo springs. I installed them in about an hour. Very happy with them. No noticeable difference in ride quality while empty. And they keep my truck level when I’m hauling my trailers. 5 stars!
Product works very well. Only problem we had was an alignment problem on the drivers side spring. Couldn't get it completely centered top to bottom, but was close enough to still fit together.
I installed on 24 Silverado 2500hd. Install went great. They work well when towing. I haul a 32’ bumper pull camper. They help reduce the sag dramatically. When not hauling, the truck rides rougher than without them installed. That makes sense and I am happy with them. I may have went with a bit less stiffness now that I know.
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