To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Heavy trailers or bed loads can make the rear of your truck sag and throw off stability. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds up to 1,900 lbs of extra support right over your factory springs, helping you stay level and steady when towing or hauling. These helper leaf springs engage automatically as your stock springs flex under load, lifting the rear end to prevent bottoming out and keeping steering and braking controlled.
Crosswinds, curves, or passing semis can make a loaded truck sway or lean. These helper springs act like sway bars by keeping your OEM springs from twisting, cutting sway by up to 30 percent. The result is a more planted, predictable feel even when the trailer moves or weight shifts in a corner. With better control, long highway drives or mountain grades feel safer and smoother.
Not every setup carries the same weight all the time. SuperSprings let you choose how much support and height you want using adjustable shackle holes. Set them high for constant heavy loads or older suspensions that need extra lift. Use the lower holes to keep the original ride height when running light. A mixed setup balances support and comfort so you can tailor it to how you actually use your truck.
Adding real suspension support doesn’t have to be complicated. These bolt directly above your existing factory springs with no drilling required. There’s no air tubing, compressors, or pressure gauges to worry about—just a solid mechanical design that works automatically when the load demands it. Once installed, they’re maintenance-free and ready every time you hook up a trailer or load the bed.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Welcome back, etrailer family. This is Steven, today we're looking at the SuperSprings Custom Suspension Stabilizer and Sway Control Kit. Now this is a vehicle specific fit, so I'll put that up on the screen there above my left shoulder. This fits a '07 to 2021 Toyota Tundra. Now with everything here to etrailer that's a custom fit, please go to our year, make, and model custom fit guide on the website. Make sure you're getting the right parts the first time.
Just plug in the vehicle year, make, and model, and we'll help you get that. Now this system is gonna reinforce your vehicle's rear suspension system with adding an extra leaf spring that's gonna prevent sagging and reduce that sway by up to 30%, which is pretty impressive. It's gonna work pretty much like a sway bar. You know, it'll stabilize your OEM springs, but also help keep them from twisting, bending. It's gonna help compensate for windy conditions or wind turbulence from big rigs passing you, sudden weight shifts from cornering tight curves, that kind of stuff.
They do help lift your truck when you're carrying a heavy load and thus preventing you from bottoming out. Now they do adjust automatically to your payload. So if you got a lighter, heavy payload, they will adjust automatically to that, and there are rollers built onto each side of these. Now I've got that front one there kind of position, how it's gonna look when it's installed. But anyways, it's got these rollers built in here and those rollers on each end of these springs are gonna activate when the OEM springs flex under a load and they will then deactivate when the OEM springs are not under a load, so pretty neat how they work.
There's some stickers on the side of these. Lemme see if I can show you one real quick. And they very clearly say on different spots, Do Not Tighten. So keep in mind some of these bottom ones already come tightened from the factory. You don't have to mess with those, you don't have to do anything with them.
Now this can be customized. So the shackles that attach to the SuperSprings here, they're gonna provide several options for insulation. You can check the instructions that are included to get that, but basically you want to choose a setting that's gonna increase load support and ride height for constant heavy loads or compensate for minor spring fatigue in some, you know, like an older automobile or older truck or something. You do wanna choose a setting that's gonna maintain the original factory ride condition and minimize the effect of the unloaded ride quality and height. Now they pretty much installed easily, they just bolt on above your existing factory springs. You don't have to do any drilling whatsoever. And like I was saying, there's some models out there with factory springs that sit above the axle. The included poly spring pads here, that's gonna prevent those from shifting. So this bottom guy here would go underneath this spring, then this spring would go in between here, okay, and then this top part would be on top. So kind of hard to see here, but this would be in between those two pieces there. And again, that's gonna them from shifting. It's a very dense polyurethane block and again, they sit between the top of the factory springs and underneath these springs, no maintenance required. There's no tubes, air pressures to monitor, or you know, adjusting things like you do in air shocks, air springs. And this will save you money in the long run because it's a one and done thing. These do help extend the life of your brakes, tires, and factory suspension. And they cost a lot less than the air spring systems that you've seen out there. Now these are made here in the good old USA. They're rated at 1,900 pounds. And by adding these, keep in mind, you're not gonna increase your vehicle's weight carrying capacity. Again, these are just helper springs, so you're never gonna add anything to your vehicle that's gonna help carry more weight, okay Just keep that in mind. Now for non-commercial applications, using these on non-commercial, they'll give you a five year warranty. If you're using it for a commercial application, then they're only gonna give you a two year warranty. So just keep that in mind. Well, again, I'm Steven here with etrailer.com, I'm looking at the SuperSprings with you for the '07 to '21 Tundra. I hope this helps you and I hope you have fun out there with your rig, with your new parts. Have a great day.
Ratings & Reviews
Just put on super springs 2019 f150 for towing a camper that is awful in wind. The installation was easy. Hoping the springs help with a stable ride. I will update when I get the camper out of storage.
Unbelievable! Why didn’t I do this sooner? I’ve never seen daylight between my tires. Gaines two inches and rides soooo much better.
E-trailer agent James helped find trailer tow package that fit my 2011 Ford Transit Connect and provided appropriate install video. You're a huge help James. The install went smoothly without a hitch (lol).
Product worked as described. Shipping was quick (etrailer used "air" to my state, then on UPS truck)
Easy to install, not sure why they included 2 sets of polyurethane blocks (only one set fit my truck)
Don't notice any ride difference when set at lowest setting. Raised truck approximately 3/4". East to readjust for more preload if needed.
Combined these Super Springs with Timbren load handlers. So far so good.
Great improvement over stock while maintaining ride quality.
2013 Toyota Tundra 4x4. Installation went well in my garage with a medium sized C-Clamp. The ride feels that same as stock. Lifted the rear 1.5" which helped off set the 2.5" lift in the front from Fox 2.0 shocks. I have not hauled a load yet.
Installing these on a 2020 F250 was easier than I thought it would be. I was able to get the springs on whit the center piece and the front shackle bolted without jacking up the truck. I had to jack the frame up a few inches on each side to get the back shackle bolt through. I put the shackle bolts through the bottom holes since I only need the extra support when I tow. I recommend air / power tools for the shackle nuts and it doesn’t hurt using them for the center bracket u bolts. They are lock nuts and they have a long way to run on for each bolt. I did have to bend my parking brake cable hangar out a bit for one of the shackle bolts to clear the cable. The truck seems to sit a little higher in the back. Maybe an inch or so. The ride empty seemed the same except it felt like it didn’t roll quite as much when turning. Rolling over a lip at the end of our driveway the extra stiffness was noticeable, however. I won’t know how well they really work until I get my fifth wheel hooked up.
Couldn’t install on my Class C due to the placement of a propane line from the manufacturer. I was very pleased with the weight and solid construction.
This was by far the easiest mod I have made to my 2019 Ford Super Duty King Ranch! Only took 45 minutes start to finish. Didn't even take the wheels off. Took some pressure off of the springs by lifting the rear end a little using the trailer hitch. Used the bottom holes on both ends and only raised the rear of the body 1 inch. Great product!
Easy to install and they definately keep my pick up from squatting as much with our trailer hooked up.
You should inform customers about special tools needed to preform install. Not on easy install as stated in video
I installed the springs in a little over an hour but have yet to put our 15,500 lb 5th wheel RV on the truck. The pin weight is around 2,800 lbs when she is fully loaded, so we will see if these help us with the sway and porposing, also the side weight when starting into a curve.
No issues with install on a 2023, E350 Class C motorhome.
After chalking the front wheels, I used two 3 ton floor jacks with 13” 6x6 blocks just behind the springs to lift the frame and rear tires off the ground to remove the wheels. For safety, 3 ton jack stands were put under the axles during spring installation
After installing the springs per manufacturer instructions, two 1/2” x 10” pieces of all thread with drilled flat bar were used to compress the front end spring.
With the least amount of preload it raised the back a good inch.
The 800# trailer tongue weight will be the next test to see if more preload is needed for a level ride height.
These leaf springs works great !! More stable my van but I would like that it brings up an inch !!! Great buy
Installed on a 2016 Toyota Tundra. I pull a 28 foot aluminum frame utility trailer. Hauls like a 3/4 ton with super spring. Rides like 1/2 ton without load. I have put 1 ton load on truck with no trailer and the truck drove fine. The front of truck at tires rose 1/2 inch. Installation requires the frame to be lifted off the axel.at rear of vehicle. I like this system better than air shocks as there is no adjustment after installation. I would purchase again.
I have the Yakima EXO Swing Away Storage System w/ 2 Enclosed Cargo Carriers - 2" Hitches on my 2025 Airstream Interstate. They were causing the van to sag. The Springs went on Fairley easy and provided the lift I needed.
I bought these as part of my suspension modifications . I had them installed on my Ford F350 SB . I have an Arctic Fox 865 truck camper. It’s a heavy camper so to minimize sag and sway I installed Timbren bump stops, a hellwig bigwig sway bar,Torque lift stable loads. That improved things quite a bit. I installed these super springs last ,they further improved sway and improved the overall stability and ride quality.
I definitely feel these were worth purchasing. I could not decompress the existing leaf springs enough to install these myself so had them professionally installed.
I would recommend them for hauling a truck camper.
Added these to my Mercedes air stream 19x class b van that already has 2 leaf springs. Had swaying issues at 60MPH and up. These put a stop to it right away and kept from sagging in the rear when loaded up with all our gear and water tank full. I have them on the mid setting. My van is 4wd and already lifted so didn’t raise it more than 1/2in. Still has a smooth ride and no big jolts like air bags or sumo springs.
I bought these a year ago so not sure if anything has changed Bad thing is they are slightly too long, Just enough to touch the wheel well and rub the under coating off. If you’re going to install yourself, I found a good you tube install. The U-bolts for install are too short. Need 2 forged C-clamps.
These are a 100% buy, don’t mess with air bags or sumos. These adjust themselves with load or no load.
Without towing, the truck seems to ride a little smoother. The real test will come when I hook up my fifth wheel. Very simple to install.
This product did exactly what I needed. Lift the RV up to unloaded height. I have not exceeded the 12500 GCWR but the rear end was dragging like it was severely overloaded. It was a very tight fit because the mud flap framing and gas lines were almost in the way. An entire day later with a couple of clamps and sore wrists at max setting fixed the sag perfectly! I wish I had before and after pictures. I can almost fit my head in the wheel where I could not get my arm in before.
Fast delivery, free shipping, the springs went on pretty easy, had some problems with install due to my vehicles configuration, Travato59K,not the springs. This was a 2024 RAM Promaster3500, raised it up 1.75” on the lower setting. Noticeable help with sway problem.
The shackles on each end were too narrow to clear the spring clips so locating them was harder than need be. The instructions had a mistake, locating the front shackle incorrectly. Installed as they are. Improved ride a lot. Glad I got them.
Exactly what I needed and what I wanted very fast shipping thanks E trailer
While use the middle setting it only gave it a slight lift with a minimal unloaded bounce. Usually never overload the trucks maximum capacity but needed to for a short distance and with approximately 1300 pounds in the bed, the truck didn't squat at all.
This was a great addition to the suspension of my 2021 Ford E350 Class C RV. The rear springs were at almost max load. This raised the chassis at the rear axle almost 2-inches. This is a heavy duty spring and I had to fabricate a tool to compress the spring.
Fit great on my 2025 Ram. I makes a big difference pull my 14000lb 5th wheel. Highly recommend these for any heavy loads. I have put these on 3 other trucks and they are maintenance free. You don't need to worry about the load you are hauling.
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