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Heavy trailers, campers, or bed loads can make the rear of the truck sag and throw off handling. These SuperSprings helper leaf springs add 950 lbs of rear suspension support to keep things level when towing or hauling. They bolt on above the factory leaf springs and engage automatically when weight is applied, lifting the rear end and keeping steering, braking, and headlight aim consistent under load.
Crosswinds, corners, and passing semis can make a loaded truck feel unstable. SuperSprings act like a sway bar by keeping the factory springs from twisting. The system cuts sway by up to 30 percent so your ride stays planted through curves and gusty conditions. The rollers at each end react instantly to shifting weight for a more stable ride when towing or carrying heavy gear.
Whether you haul heavy every day or just want to firm up older springs, the adjustable shackles let you dial in support. Choose an upper hole for maximum load support and ride height, a lower hole to maintain factory ride when unloaded, or a mixed setting that balances comfort and lift. Each option gives you control over how much help the springs provide without changing everyday ride quality.
Unlike air systems that need hoses, compressors, and pressure checks, these helper leaf springs do all the work on their own. When your stock springs flex under load, the SuperSprings engage automatically; when unloaded, they back off for a normal ride. There’s nothing to adjust or maintain—just consistent support that saves wear on your brakes, tires, and factory suspension over time.
Installation is straightforward with included mounting hardware for trucks that have OEM leaf springs above the axle. The kit includes 2-inch brackets that act as fulcrum points so the springs operate quietly when unloaded. Just bolt them in place using basic tools—no drilling needed—and you’re ready to tow or haul with more confidence right away.
Ratings & Reviews
Springs arrived one day earlier than promised then the mounting kit arrived the next day, on time. Checked for the fit of the mounting kit and it clears the axle and bolt sticking up through the existing springs, but didn't check clearance for the springs yet, will wait until I have more time and actually install them. The springs and mounting kit look strong and should do their job.
These helper springs worked well. My truck didn't sag nearly as much with similar loads in it than it did before. Probably raised it around 4-5 inches when loaded and about an inch when not. Only complaint is the bolts holding the product to the adapter for a spring over axle setup are not of a high grade. They broke, but I may have overtightened them. I replaced them with some grade 8 bolts from the hardware store. They are only needed to hold the new spring in place when the vehicle is raised off the ground. They don't affect the performance of the product.
These helper springs worked well. My truck didn't sag nearly as much with similar loads in it than it did before. Probably raised it around 4-5 inches when loaded and about an inch when not. Only complaint is the bolts holding the product to the adapter for a spring over axle setup are not of a high grade. They broke, but I may have overtightened them. I replaced them with some grade 8 bolts from the hardware store. They are only needed to hold the new spring in place when the vehicle is raised off the ground. They don't affect the performance of the product.
This product is a must if you are looking for a pleasant ride empty, yet still have additional capacity when you need it. I purchased it because I haul a Lance 1062 camper and was not pleased with the air bag setup I had been using. The air bags would handle the load just fine, but I got a lot of side to side motion while going around corners. I even set each air bag up independent of the other. The SSA15 kit eliminated the side to side motion. It really does act like a sway bar. I recommend you remove the rear tires when you install, it will make it much easier.
Can not believe the conversion did not include beefing up suspension! Much superior ride with Supersprings and less complicated than airbags. Also added new Sumo shocks front and rear. They also removed the sway bar because of generator installation.
The springs, I’ve used on a couple different vehicles over the years, as I’ve also used several air bag set ups, I wanted the simplicity of a one and done for the life of the vehicle kind of setup. This is what I get with these. Install was fairly easy with my available tools and I would easily recommend these to anyone that wanted something purposeful, reliable and straight forward. I load the van with ADV motorcycles, Dirtbike’s and trailers full of gear, supplies and wood and they do just fine, keep a level ride and don’t say in the least. Satisfaction thus far! application
I used the SuperSprings to help support my Slide In Camper for my 2500 Chevy. They support good. I have Timbren installed also, but were bottomed out. After adding the SuperSprings with the Timbren the camper is supported good. The truck sits and rides level
Very pleased! There are two settings, but I prefer the heavier capacity setting and higher in the rear feeling. It has made all the difference in the world with my long wheelbase 2002 Chevrolet Astro Van. I really do not feel that it has changed my ride comfort that much, very little, if any. I always have some kind of load on the van, whether hauling cargo in the van, or towing a trailer, that my ride is still as smooth as always. But, the remarkable thing is, that now my rear end isn't sagging to the ground like it always use to be, even without a load! I'm super pleased and would recommend these springs to everyone for the reasons I've shared above.
Packages arrived on time, everything was there, installation went good, I removed the rear tires to make it easier, picked the rear of the truck up by 1 3/4 inches, have not hooked up 5 th wheel yet, we will see if it helps with the bottoming out .
I bought these for my 2011 Silverado 1500 crew cab 4wd, truck had a 6” lift and 35” tires. I was frequently towing a 5k pound horse trailer ( bumper pull not gooseneck ) and was getting a lot of bounce in the truck. As a honest review, I installed them ( quick and easy I add ) and removed them a month or so later. They did everything they were suppose to, sway was better, felt more In control at high speeds, and less squat on the truck. My complaint was my truck rode like a 3/4 ton truck without the trailer and I didn’t have 3/4 ton power. So I removed them to get my ride quality back, eventually selling the truck and buying a 3/4 ton. Now in another 3/4 ton for a few week, I would say it wasn’t as bad as a true 3/4 ton, but it does firm up the ride a bit. I still give it 5 stars because it did exactly what it was suppose to, super cost effective, easy to install and remove, no fabrication etc. also I requested some precise measurements on individual pieces from etrailer customer service for fitment with my lift kit and they responded same day with all measurements I needed.
Sum up if your debating, it’s easy to install, easy to remove, way cheaper than bags, adjustable, work great.
Used to sell SS, easy effective upgrade as usual....
If you watch the video on installation from the model - SSA13MXKT, you will see how to install them, that's why I don't have any pictures. It took me about 2-1/2 hours to install. The brackets were a plated color and I painted everything black before installed them. My truck was pretty clean underneath so I think they look better. I installed them on a 2019 GMC Denali HD 2500 Duramax. As far as handling, after the install, I did not notice too much difference empty. But - when I had my 5th wheel hooked up, there was a difference, not a significant amount, but a difference. My pin weight on the trailer is roughly 1,350 lbs. also. Now for the dimensions here is what I got - I would say, these dimensions are within an 1/8". The dimensions were taken from the center of the tire to a line on the truck, front and rear.
BEFORE INSTALL -
Rear - 43"
Front - 40-1/8"
AFTER INSTALL -
Rear - 44"
Front - 40-1/16"
WITH MY CAMPER HOOKED UP
1,350 lbs. Pin Weight (CAT Scale Certified)
Rear - 42-5/8"
Front - 40-1/8"
As you can see, it dropped the truck down 1-3/8". Before the install my truck would "squat" approximately 2-1/2" So, they made a big difference, an 1-1/8" difference. Before the install, the front was about (I never got a good measurement on that) 41".
We purchased the product and it arrived on time, scheduled the mechanic to install the springs at the mechanics shop on step 1 of the instructions that we needed a special bolt kit for an additional $120.00 this was very miss leading. We ordered the additional bolt kit should be delivered on 11/18/24 we will see what is next. It would have been nice to have a pop up or some type of information warning us of the additional bolt kit when ordering the product stating we needed to purchase and additional kit. Im not to impressed with the purchasing part of the SuperSprings experience, hopefully they will be a superior product so I can forget about the bad experience. We will see
Great price fast shipper easy to work with on ordering
Overall, the installation of the SuperSprings kit went pretty well. The instructions sent with the kit were not all that clear, but the info on etrailer's website saved the day. Can't wait to put the camper back on the truck and see how it rides!
These helper springs were installed on my 2006 GMC Sierra 2500 HD with 92K miles. Previously, I had used Timbren "enhancers". I like the super springs much better. The ride is much better with the SS. Driving over a speed bump no longer results in whiplash that the Timbren enhancers caused. With a 1000# slide in truck camper the truck sits level. There is not a lot of sway in cross winds. I did install a rear sway bar so that the truck handles normally when my wife drives it loaded. I also tow a boat while the camper is in the bed and there are no negative aspects to this. I recommend the Super Springs for load control on a 06 GMC.
The kit looks really good but I can’t figure out how to install. Enclosed are two photos showing my van suspension and the parts your sent. The instructions do not show my van with only one spring. Can you advise?????????????? Thanks.
I have ordered a few things from etrailer and they have been on top of things As for this particular item (super springs) I’m very impressed!!! I have a very heavy over loaded truck I typically run 70 to 80 psi in air bags I had my doubts that it would put me at my ride height that I wanted it’s exactly where it needs to be I hope it holds the same or close to it when I hook to my trailers. wish I would have taken before and after pics but again very impressed and would highly recommend
The Super Springs work great! I pull a 8,500# trailer with a hitch weight of 950# with a 2004 GMC Sierra 1/2 Ton. The truck pulls fine but even with an equalizer hitch still had some sag. The Super Springs were easy to install and leveled the rig. After a year everything still works great.
easy to install, hope they work as good as advertised and installed. will find out soon
Good product and very easy to install! Would recommend these springs to anyone.
Easy to install and works well
Superspring purchase was right on the mark. Gave George J. all the info on my truck, rv and what I was experiencing. He suggested the SSA5MTKT springs that they should take care of my problem. I installed them in 45 minutes, hooked to my rv and made a pull. I was able to pull at 65 and 70 mph with minimal bouncing and rocking. An increase of 1" in loaded ride height and 10-15 mph was perfect. Thanks George J. and the staff at Etrailer.com
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