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When the back end squats under a trailer or a full bed, these SuperSprings helper leaf springs step in with up to 6,800 lbs of extra rear suspension support. They bolt on above your existing leaf springs to keep the truck level and prevent bottoming out while towing or hauling. The rollers at each end engage automatically as the factory springs flex, so you get more lift only when it’s needed—no air lines, valves, or adjustments to worry about.
Strong crosswinds, passing semis, or tight corners can make a loaded truck lean and sway. These helper springs act like built-in sway bars, keeping your factory springs from twisting and reducing body roll by up to 30 percent. That steadier stance means better control on highways and mountain roads, even when the load shifts or conditions get gusty.
Not every load is the same, so these SuperSprings give you ways to fine-tune support right from the start. Use the upper bolt holes for more lift and firmness if you’re always carrying weight, or the lower holes to keep close to the factory ride when you’re mostly running empty. You can even set one end higher than the other for a balanced middle ground between comfort and support.
With no drilling required, these springs bolt straight onto your factory leaf pack using included shackles and poly spring pads where needed. There’s no air pressure to monitor and nothing to service later—they just work automatically whenever the load flexes your suspension. Once installed, they quietly do their job trip after trip, helping extend the life of your brakes, tires, and factory suspension while keeping your ride stable and level.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody, Andy here with etrailer.com. Let's take a look at this Super Spring custom suspension stabilizer and sway control kit. Now this kit is going to fit various years, makes and models of different types of motor homes. So take advantage of our vehicle fit guide here at etrailer.com. Insert the year, make and model of your vehicle and our fit guide will confirm if this kit will work for you or if we have something comparable that will work for you. These Helpers leaf springs have a weight capacity of 6,800 pounds and these are going to install above your vehicle's factory leaf springs to reinforce your vehicle's rear suspension to help prevent sagging and reduce sway by up to 30%.
These are gonna work like sway bars to stabilize your OEM springs and keep them from twisting. And these are also going to compensate for windy conditions, wind turbulence from big rigs and weight shifts from cornering. These are going to help lift your vehicle when you are carrying a heavy load to help prevent bottoming out. And these are going to extend the life of your brakes, your tires, and your factory suspension. Now I'd like to take a closer look here at this part of the kit.
These springs will adjust automatically to your payload. The rollers on each end of the Super Springs activate when your OEM Springs flex under the load and the rollers will deactivate when your OEM Springs aren't under a load. These springs can can be customized. The shackles attaching the Super Springs provide several options for installation. You can choose a setting that increases load support and ride height for constant heavy loads or to compensate for minor spring fatigue in an older vehicle.
Or you can choose a setting that maintains the original factory ride conditions and minimizes effect on unload ride quality and height. And you can choose a medium setting that balances support, height, and ride comfort. Now these springs are made here in the USA. They are going to install relatively easily and simply you're just going to bolt them on, bolt 'em above rather your existing factory springs. And what's nice about this kit is you're not gonna have to worry about drilling.
No drilling is required. Now, for some models with factory springs that sit above the axle, the included poly spring pads that you see here are going to help prevent shifting, and the dense polyurethane blocks are going to seat between the top of the factory springs and the underside of the Super Springs. Now these are going to require no maintenance. You don't have to worry about things like tubing or air pressure to monitor like with air springs. And again, I mentioned that the weight capacity is 6,800 pounds. But just be aware that Super Springs do not actually increase your vehicle's weight carrying capacity. So you wanna make sure that you're not exceeding your manufacturer's limits. These do have a limited lifetime warranty and instructions are included to guide you through the installation process. Well, I think that's gonna wrap up our look today. I do hope that our time together was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
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.
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!
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.
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.
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.
These leaf springs works great !! More stable my van but I would like that it brings up an inch !!! Great buy
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.
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.
Bought these in the past and if I ever get another truck I’ll be putting these on again. Great for helping extra heavy loads not to sag the truck.
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