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When you hook up a trailer or fill the bed with heavy gear, these helper leaf springs take up to 3,500 lbs of rear suspension load to keep your truck level and your ride steady. They mount right above your factory springs to prevent sagging and reduce sway by up to 30 percent. With the SuperSprings setup carrying part of the weight, you’ll notice better braking, steering control, and less rear-end squat when towing or hauling.
Crosswinds, passing semis, and sharp curves can all make a loaded truck feel loose. These helper leaf springs act like sway bars for your existing suspension, keeping the factory springs from twisting under stress. The result is less body roll and a more planted feel on the road, even when towing through windy conditions or uneven terrain.
You don’t have to adjust anything when the load changes. Rollers on each end of the SuperSprings automatically activate when your factory leaf springs flex under weight and deactivate when unloaded. That means consistent support only when you need it—no tubing, air pressure checks, or manual adjustments required.
Every setup is different, so these helper springs let you choose how much lift and support you want. Use the top bolt holes on the shackles for maximum load support and extra ride height under constant heavy loads. Go with the lower holes to keep a more stock ride height when unloaded. The mixed setting balances both for drivers who carry changing loads or want a middle ground between comfort and firmness.
Bolt these helper springs right above your existing leaf packs using the included shackles—no drilling required. Dense polyurethane blocks seat between the factory spring tops and the underside of the SuperSprings to prevent shifting. Once installed, they’re maintenance-free with no air lines, compressors, or pressure checks to worry about, making them an easy upgrade that adds stability without adding chores.
This kit is designed to fit a vehicle with factory top overload springs. As shown in the picture above, a top overload spring sits above the factory leaf spring pack.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
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.
very quick service
Julian
2/23/2023
It works good only problem is rubbers in between springs rip after awhile and super springs start shifting
I wasn't expecting them today, Very fast delivery. I can now get the customer back on the road faster because of the quick delivery. Thank You for the prompt service!
I have installed this product on many vehicles and my customers are sasatsfied, Shipping was next day fast.
This product is very heavy duty and very well made. It is very simple to install. The service was great and was delivered earlier than expected. The experience was great.
Ritch
8/12/2021
It still working Great. Carrying the loads like Desscription stated
I offer these in my shop and have had excellent customer feedback!
GREAT PRODUCT
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.
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Condition: Missing Parts
Notes: Item is missing all of the spacers, brackets and u bolts with nuts. Some scratches and paint damage present.
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Katrina B.
10/7/2022
I see that you gave your experience with etrailer 1 star. If you give me more information about why you are disappointed in us, I will be happy to assist you.