When extra weight pushes down on your coil springs, these Coil SumoSprings helper inserts step in to keep things level and comfortable. Each spring has an inner core made from microcellular polyurethane foam that cushions your ride while supporting the load. The material adjusts progressively—the more weight you add, the stiffer it becomes—so your truck stays steady whether you’re carrying tools, towing a trailer, or hauling gear.
Heavy loads can cause your coils to compress completely, leaving no cushion between you and the road. These wedge-shaped helpers fit between each coil to restore shock absorption and prevent bottoming out. The progressive foam design absorbs impact and keeps your suspension working as it should, reducing driver fatigue on long drives or workdays.

When towing or carrying uneven loads, body roll can make highway driving and cornering stressful. The added support from these helper springs helps level the vehicle and cut down on sway so your steering stays responsive and controlled. You’ll notice a more planted feel when braking, turning, or dealing with crosswinds.
Unlike air systems with lines and valves to monitor, these helper springs need no air pressure or adjustments once installed. They simply insert between your existing coil loops and get to work. Built to handle extreme temperatures and resist abrasion, oil, road salt, and UV damage, they deliver lasting support with zero maintenance required.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi there Heavy Haulers! Today we will be taking a look at SUPERSPRINGS's line of Coil Sumo Springs. Now, before we install our Sumo Springs on our vehicle here, we want to make sure and see how our stock suspension rides. So we can get a good comparison of the improvements that we've made with the Sumo Springs. So the first thing we want to see is our factory ride height with it, unloaded. Then we're going to see, when it is loaded. And then we'll perform the same tests on our test course with it loaded up, without the Sumo Springs, and then we'll do it again after we've got them installed to see how they compare.
So first off, we need to see our ride height. We're currently unloaded. And here at the back, we're sitting right at about 33 inches. And today we're going to be putting these on a Subaru Ascent. And here at the front of the vehicle, we're right at about 32 and three quarters of an inch.
So we'll go ahead and load it down now, and see how our ride height changes. So we've gone ahead and loaded it up with a couple hundred pounds of sand, and we're going to recheck our ride height. And now with it loaded up, our ride height here in the back's dropped down about a half an inch. So we're at 32 and a half inches. And here in the front, it's raised our suspension up by about a quarter inch.
So we're right at about 33 inches here. So we're going to go ahead and get those Sumo Springs installed now. And we'll recheck our ride height. We're also going to hit to test course before we get those on. So let's get that to test course and then get in the garage.
So here we are in our vehicle now. We're in our test course. And what I did notice, just lining it up in the test course versus loaded and unloaded, is that we've got a bit of, the hood's raised up a little bit. We see more hood than we used to, so we lost a little bit of visibility there. We're going to start with the uneven bumps section. This is going to simulate like hitting a pothole. And as we hit these here, the suspension in this vehicle is very smooth. So we don't really have a lot of rocking and stuff like that going on. In the biggest thing so far I noticed is that we can see more hood. You can definitely feel that we're leaning back. Next we're going to go into the even bump section, and this is going to simulate a speed bump or like pulling in and out of your driveway. And here, when we go over it, our suspension again, does seem to be taking it pretty well. We don't have a bunch of up and down motion. It's not excessively stiff. So it does feel fairly well. So let's go ahead and get to our slalom section now. And this is where we're going to mimic an evasive maneuver. We're in our section now, so we're going to start giving it a little bit of that. And I mean, it handles fantastic. The suspension on this car is really good. You can hear the things moving around a little bit, but it's, it doesn't feel like we've got excessive sway or anything like that. So this vehicle does have a pretty solid suspension system. So we're going to head back to the shop now. We're going to get these Sumo Springs installed and we'll hit the test course and see how it differs. I feel like this is mainly going to be for people that maybe have like a pop-up camper or something that they're wanting to bring on the back. And they've got maybe like 300 or 400 pounds or even greater in the back there. So we are here in the shop and see what happens. So we've got our Sumo Springs installed now. We've got our vehicle loaded up the same weight that we had before. Let's recheck our ride height. And we're right at about 32 and a half inches. So it didn't really raise our vehicle up any, having these installed. And now here in the front, when we check our suspension, we're right at about 32 and a half inches. So it has lowered our vehicle down about a half inch from where we were, when we we're fully loaded up. So what it seems like is that the suspension enhancement in the back, rather than lifting up on the back of our suspension to kind of, raise it back upto where it was unloaded, it just kind of repositioned it a little bit. So we're still down a little bit in the back, but we we're also down in the front now more level, kind of closer to where we we're before. So let's hit the test course and see if we can feel a difference. All right, so we're hitting the test course once again with our Sumo Springs installed. And I do notice right away that the sitting in the vehicle, the hood's a little bit back down. It feels more like we're sitting in it unloaded since we're not seeing quite as much as the hood. So we're gonna hit that uneven bumps section first here, and it feels a little bit stiffer in the back. It doesn't really feel too much different. It feels pretty natural here on the inside. I would say it is definitely a little bit stiffer. As we hit these front bumps here, I can tell its a little bit softer on the factory suspension versus the back. The Sumo spring is just a little bit stiffer than where we we're before. But I wouldn't say it's at all uncomfortable. It feels for the most part, fairly natural. Same thing when we hit the even bumps. Really nothing stood out there, just a little bit stiffer. So now we're gonna go ahead and hit the slalom section and see if we can see a difference here. And this is usually where I noticed a huge difference, but the suspension on this is already pretty darn good. So we'll see if we notice much of a difference. And there's nothing really right away, that stands out at me. It does feel like there's a little bit less way and roll than before, but there's not a huge difference here either. This Subaru does have some pretty darn good suspension. I'd say the biggest notice out of anything. is just the way the vehicles more level, when riding now, I'm not seeing quite as much hood. I know it's going to make a huge difference at night. During the daytime here, it makes a little bit of difference because we've got a little better visibility at the front. But at night when you have the front end aiming up, your headlights are pointed towards the sky a little bit, you're not really getting proper reflection on the road and it does drastically reduce your visibility at night. And this is what our Super Springs look like when they're installed. These go in between the coils of your suspension system. And there are rear and front's available here at etrailer. We're showing off the rear set today. These are designed to fit a whole bunch of different vehicles and can be trimmed to fit. So that way you can ensure that it's going to be a proper fit for years. But as always, I recommend that you use our fit guide to ensure that these are going to be a proper fit for your particular vehicle. The main purpose of Sumo Springs is to provide additional suspension support for your factory suspension system. Now, the support that it provides, doesn't increase the load carrying capacity of your vehicle. It just provides assistance to help support the weight that your vehicle can already carry and just carry that weight better, so your suspension isn't sagged down so much here in the back. It's going to overall improve your ride quality when loaded down and just give you a little bit better handle on your vehicle when you're hauling a bunch of weight. This works using the Sumo Spring technology here. It's made of a micro cellular polyurethane that is compressible, but it's got a neat property to it. It's actually quite dynamic in its compressibility properties because when we're at our normal resting state, like we are now, we've got our suspension hanging. We're really not getting any support from our spring right now. But as we go to load this down and it goes to squish the spring, it starts off squishing really easily. And then it gets progressively stiffer as you squish it more. And that's going to make it nice and dynamic. So the more you load down your vehicle, the more support and stiffness you're going to get out of this spring to help carry that weight. So it really does help out a lot with roll, helps out with your ride height. Really overall, these are a great option for just restoring a loaded down vehicle's performance back to where it would be when it wasn't loaded up so heavily. I like these over air bags because they're completely maintenance free. With air bags, you have to check the air pressure. When you go from between different seasons, like summer to fall to winter. As temperatures go down, pressures go down and you got to keep up checking these to make sure that it has proper air in it. Whenever you load your vehicle down, you need to adjust the air pressure to match your load as well, which just can be kind of bothersome. With these, you just load it up and they're dynamic and progressive the way they work. So you just load it up, you just forget about it and drive off. With air bags you might have five, six pounds in it. when you're unloaded, you get to the place where you're picking something up. Maybe you're picking up a load of bricks or something, to bring back and build a little fire pit. Well, now you get your vehicles all loaded up, you got all this weight in the back, that five pounds on your airbags, isn't really doing a lot for you. So you're going to have to stop at a filling station and put some air in it, or spend a lot of money on an onboard compressor system and be able to do that on demand. So airbags, they do have their place, but I really like these for just kind of your, more general purpose applications. If you're going to be looking at something really heavy duty, those airbags might be a good consideration, because you can get more stiffness out of them, you got more adjustability in the pressure. But for the average user, I think these are going to be probably one of the best setups. We'll begin our installation underneath the vehicle. The first thing you'll want to do is lift the back of your vehicle up. So that way, your suspension is hanging. I would recommend if you're doing this at home in your driveway, just do it one side at a time. That way you can lift just this back tire up, so it's off the ground. That'll give you more distance between your coil spring, making it easier to install our suspension enhancement system here. So once you've got your side lifted up, we're using a lift here. So we've got ours up, differently. Make sure you chuck your wheels as well, if you're doing this at home on the ground. We're going to clean our coil spring off first. You can see it's kind of got some dirt and debris on it there. So we're going to get all that out of there just to make it slide in a little easier. We're just using some soapy water and just a rag here just to clean these off. We're just going to wipe down all these coils just to get that dirt and debris off of there. All that dirt really makes it a lot harder to slide your suspension enhancement system in place. Nice clean, smooth coils will make things a whole lot easier. So we're just going to give those a good wipe down here real quick. And now that we've got them wiped down, we're going to reapply the soap to our coil spring. And I'm also going to apply the soap to the Sumo Springs. And now we're ready to insert it. And first you're going to identify, which is the top side, and this can be done by checking the grooves. So this group here, you can see how deep it is. You see a little bit of my fingernail sticking out the top there. If we flip it over to the other side, I stick my finger in, you can't see my fingernail at all. The deeper groove is your bottom. So now that we know the correct orientation we're just going to take our spring here, and we're just going to start feeding it into place. I'm going to take one section here and I'm just pushing it in between the two coil Springs. And that's really all that there is to this, is just pushing it into place. I'm getting one side started, and after I get it started, I'm just going to kind of work the coil spring around, into place. And it's just kind of rotating around. There we go. We got to all fall into position. After this, we'll need to just set the adjustment for the height and it's best to install these between the second and third coil from the top. So we're just kind of rotating ours to about that position there. That looks pretty close. So that's good. The next thing we'll want to check, is our overlap. So here you can see the overlap at the back, where our lower spring here sitting underneath the top part of that suspension enhancement system. We want our overlap here to be between about a half an inch and an inch. And we're sitting at close to a, probably two, maybe two and a half to three inches. So we'll trim this down. You can use really whatever you've got available to trim it. Probably a little bit of a saw or something would probably work well. It's pretty thick, so you might be able to use some cutters to cut it, but it is pretty thick. The hardest part is, it spreads. Now we're not going to be trimming ours today for demonstration purposes. We're just going to, deal with the overlap that it's got there. But also did want to point out the holes that you see there at the back as well. You see those little dimples that are located there and you have one of them, a dimple on the top one as well. That will allow you to slide a zip tie through. So you can zip tie these to your coils because on some vehicles, they might be a little bit loose and sloppy, and this is probably a good candidate for it because it is fairly loose inside this coil. And if it's got a lot of play like that, and it's not a real tight fit, it is possible that it could pop out of there when going down the road. So it's why it's got those little holes there. You can run a zip tie to zip tie it right to the coil spring. So that way there's no way it can come out of there when you're traveling down the road, make sure it stays in place. So now we have our passenger side fully installed. We're going to repeat the same process over here on the driver's side to get this one installed as well. And that completes our look at SUPERSPRINGS's line of Coiled Sumo Springs..
Ratings & Reviews
Helps when under heavy load and reduces “bottoming” out effects on rough terrain. Using this for towing a travel trailer approximately 8000 lbs. with a 2008 Ford Expedition.
Installed on 2014 Ford Expedition limited and very happy with this product, improved the ride when towing and not towing.
Installation was relatively easy thanks to the people from etrailer that helped me choose the right size for my vehicle.
Thanks everyone at etrailer for helping me with this project.
I added Sumo Springs to my 2019 Winnebago Travato on the Promaster chassis, and it made a huge difference in handling. Better ride, less sway, and surprisingly, not any harsher.
Would definitely recommend.
eTrailer delivered once again! Great service, support, and the product was exactly as advertised. Installation was easy with clear instructions. The product seems of great quality. I have yet to try the car with the trailer connected, but from the looks of the installation it seems that the results will be as good as the experience thus far. I recommend eTrailer.com.
Installed over a year ago on a 2020 Ford Expedition. I pull a 30’ travel trailer and the sumo springs made a big difference. Well worth the money, easy installation.
SumoSprings makes a great line of products. I have them on the rear of my vehicle and boat trailer as well.
I installed these on the rear of my 2017 Ford Expedition EL, hoping it would help with the ride quality and handling while towing my 6,500lb travel trailer. The box did not come with instructions, but I downloaded them from etrailer's site. Installation was fairly easy, although I did have to take the wheels off. After my first trip with the trailer (400) miles, I didn't really notice any improvement with the handling, but hopefully they are helping take some of the stress off the rear springs. These are fairly expensive for something that has no noticeable benefit, so I don't think I could recommend them.
They seemed to help with towing our popup camper on our 2012 Highlander. The popup is 2,800 pounds unladen weight. Installation was very easy. I didn’t have to remove the tires. Just jacked up the rear of the vehicle to gain a little more access and they slide right into the coils. I feel that the price was pretty steep considering all the more that they are and they couldn’t even throw in the zip ties to boot. Claimed to be made in USA, but I can only hope that they were again considering the price. All in all I’m pleased with them.
Sumo springs installed without removing tires, just used a 2 ton floor jack to lift the rear tire off the ground to put the lift spring in a negative relaxed position. Then followed instructions and cleaned springs with dish soap and water, also used solution on sumo lift coil. Coil snaked between lift springs without any problems. Placed Ty’s per instructions using a needle nose pliers to pull tyes securely in place and cut off any excess tye. Sumo are working great .!! If you haul a trailer get these springs lifts the really do work according to advertisers info.
The Sumo Springs Custom Helper Springs I purchased and installed on my 2022 Winnebago Solis 59PX have made all the difference in the way the vehicle handles. I purchased both sets of helper springs for the front and rear. They have made a huge difference. I believe they are worth the price of the products.
I installed these on our 2020 Ford Expedition this past spring. Went on super easy using a little dish soap, much easier than I had heard from other reviews/videos. Works great to prevent squat while towing our travel trailer with a 900 lb tongue weight (scale weighed). I do notice a slight increase in stiffness/jitter from the rear when not towing and vehicle is lightly loaded, but nothing that makes me want to remove them.
WAY harder to install than I thought, but once I figured out how to do it (the half-dozen YouTube videos I watched didn't really help) it went pretty easy. Far too expensive for what you get (should be a third the price at most), and didn't get any additional front lift on my brand new Promaster 2500. On the first test drive after installing them, I honestly didn't notice any difference. Time will tell. Probably could have done without them, at least for now.
Put these on my 2017 Ford Expedition EL equipped with the factory installed towing package. I tow a 2014 Winnebago 30 RE. I had used these on my previous Expedition. The tongue weight of the trailer is such that I got about 1 1/2" of "squat" when hitched (and with the weight distribution hitch correctly set). The Sumo Springs reduced the sag by about 1".
A bonus if you will is that these have no effect on ride when the trailer is not hitched to the vehicle.
These work well and are a great alternative to air shocks. They can be a bit tricky to install but with some patience and elbow grease you can get em on.
I installed these on a 2020 Honda Passport (vehicle not listed in the fitment for this product). Installation was quick and easy. These worked great to help control the squat and reduced the bounciness when the trailer was loaded. After installation, I towed a single axle enclosed trailer (6'x14') with the contents of a single bedroom apartment from New Hampshire to Michigan and I am glad I made this choice. With them installed, I have noticed a very slight stiffness when not towing a trailer, but I intend to leave them on.
Got em in! Not the easiest install, but they seem to stiffen up the ride. I’ll update after the next trailer trip...
Game changer
2005 Honda Cr-V, they went on pretty easy, it was a tight fit but no trimming required. I jacked the car up on some stands, had both sides installed and zip tied in 45 minutes..
Just finished installing these on my 2014 Ford Expedition EL Limited. Very easy to install. Never removed the wheel to install. Jacked the vehicle up one side at a time and did the install. Haven't hooked to my 30ft camper yet to see how they work. Will update after my trip in July.
OEM springs not strong enough.
After installed feels a lot stiffer and raised the back 2". Material looks really good. Installation done in 40 min using a nut driver, a flat head screw driver and hand soap. I did have to take wheel off it just makes like easier.
Pretty easy install on a Winnebago Solis, built on the Ram Promaster 3500 chassis, took about an hour to install on all 4 wheels. I only parked on a level surface and used the factory jack, didn’t even lift the van off the ground all the way but enough for clearance to install, no tire removal done. I gained about an inch of clearance which is nice for my onboard generator and hoping for a better ride on windy days. The pictures are before and after of (in order) front, rear, size difference of Sumo vs. oem and the generator.
Initial reaction is positive - I installed front and rear sumo helper springs yesterday (5-23-19) and did a test drive around the block. The side to side pitching of our Transit Class B+ motorhome was greatly reduced. I still need to test on highway. I did not install the optional spacers that increase the ride height and reaction time of the rear sumo springs. The spacers will be added later if needed.
Ok installed outside january 27th. Temp 10 degree windchill -5. I used canola oil since it stays slippery when cold. I recommend taking off the tires. Also wirebrush the coil spring to get rust and debris off. Coat coil spring in canola oil. Also 1997 crv rear will require about 3/4"-1" off of the helper spring before hand. The driver side took 15-20 mins the passenger less than 5. My car rear was sagging it sits level or slightly above level now in the rear. Mileage of vehicle is 73k shocks struts and springs are original. Curt class 3 hitch is also installed on vehicle. I am curious to see how it does while pulling a 5x8 trailer. Overall seems good only time will tell. Wondering how installing two on a side would do?
Improved handling/safety significantly while towing. This is the first vehicle I used these on. I will not have another tow vehicle without Sumo Springs.
Easy to install, received fast!
Perfect fit on my Ridgeline
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