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When heavy gear or a trailer pushes your rear suspension down, these helper leaf springs pick up the slack. With a 1,100-lb capacity, they mount above your factory leaf springs to lift the rear back to level and prevent sagging or bottoming out. The rollers on each end engage automatically as your factory springs flex under load, adding support only when you need it. That means a level stance for steady steering, braking, and headlight aim even under serious weight.
Crosswinds, passing semis, and cornering all test how stable your truck feels when loaded. These helper springs act like sway bars by keeping the factory springs from twisting under pressure. The result is up to 30 percent less sway and a more planted feel through turns or on the highway. You’ll notice fewer body rolls and less rocking when you’re towing or hauling a full bed of gear.
Every setup is different, so these shackles give you options. Use the upper bolt holes for maximum load support and extra ride height on older or constantly loaded trucks. Use the lower bolt holes to maintain a factory-like ride and stock height when unloaded, or mix one upper and one lower hole for balanced support and comfort. Once installed, they work automatically—no air pressure or adjustments to mess with.
You don’t have to drill into your frame or run air lines to get stronger suspension. These bolt directly above your existing leaf springs with dense polyurethane pads that seat everything in place and prevent shifting on models with springs above the axle. The setup is maintenance-free with no tubing or fittings to check—just solid mechanical support that extends the life of your brakes, tires, and suspension components.
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?