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When you’re towing a trailer or hauling a heavy load, nothing throws off your ride faster than rear-end sag. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds 1,900 lbs of support by mounting directly above your factory leaf springs. As the stock springs flex under load, rollers at each end of the helper springs engage to lift and stabilize the rear, keeping your vehicle level for better steering control and braking confidence.
Wind gusts, passing trucks, or quick lane changes can make a loaded rig feel loose and unsettled. These helper leaf springs work like sway bars, reducing body roll and sway by up to 30 percent. They keep your OEM springs from twisting so your vehicle feels planted in corners, when towing on the highway, or when the wind picks up. You’ll notice steadier handling and a more comfortable ride no matter what’s in the back.
Different loads call for different setups. The shackles that attach the SuperSprings can be installed using upper or lower bolt holes to fine-tune support and height. Choose a setting that increases load support for constant heavy loads or spring fatigue, maintain factory ride height for light use, or go with a balanced setup that blends comfort and control. This flexibility lets you dial in the right feel without affecting unloaded ride quality.
Unlike air systems that need lines and constant pressure checks, these helper springs adjust automatically to your payload. When unloaded they stay relaxed; when weight builds up they engage instantly to share the load. No compressors, tubing, or PSI adjustments—just consistent support every time you hitch up or haul out.
Installing extra suspension support doesn’t have to be complicated. This kit bolts on above your existing factory springs with no drilling required, and dense polyurethane pads help prevent shifting where needed. Once in place, the system reinforces your suspension to reduce wear on tires and brakes while extending component life. It’s a straightforward upgrade that keeps your truck ready for real work without extra upkeep.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
John
9/3/2026
The product works great after a year. I highly recommend the super springs for any heavy loads. After they are installed you never need to worry about the load.
Jerry B.
9/3/2026
Gwendolyn Y.
4/23/2026
Thanks for your feedback, Bob! We’re glad to hear the shackles made a noticeable improvement in your ride quality. We appreciate you pointing out the fitment challenge and the issue with the instructions, I'll pass it on to SuperSprings.
Javier G.
10/21/2025
They are working out fantastically! Now we dont bottom out and damage the sewer dump. Weve been all a long road trips and nothing is bothering us now in regards to suspension.
T
3/6/2026
Works great towing and seems to help with some sag and roll. I use them along with airbags so towing my fifth wheel is now worry free.
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Nick S.
12/1/2025
That is great to hear! I am glad this addition has worked well for your setup. What RV do you have that you added this too?