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Rough roads don’t have to shake everything loose inside. This system’s 6-leaf slipper springs and nitrogen-charged gas shocks work together to cut bounce, chucking, and porpoising by up to 50 percent. Each spring handles 4,000 lbs, and the tandem-axle setup is built for 3" round axles. Independent axle operation keeps traction consistent—up to 70 percent better during braking—so your trailer stays steady mile after mile.
Standard equalizers pass vibration from one axle to the other, but these center hanger boxes stop that. They sit flush to the frame and isolate each spring to eliminate the wave of motion that usually follows a bump. Inside each box, a roller and safety bolt guide the flat slipper end of the spring so it moves smoothly without hopping. The result is a quieter, more controlled ride with less sway and stress on the frame.
Every leaf spring comes with Never Fail bushings already pressed in. They’re made from a molybdenum- and graphite-filled material that’s more durable than brass or nylon, so there’s no greasing or squeaking to worry about. It’s a true bolt-on upgrade designed for longevity and low upkeep—ideal for trailers that rack up serious mileage.
Each shock compresses from 17-1/2" extended down to 11-1/2" and mounts between 20 and 40 degrees for optimum leverage. That geometry limits both up-and-down and side-to-side movement during compression and rebound. Whether you’re towing across pavement, cobblestone, or gravel, the system keeps the tires planted and the trailer stable for a smoother, safer pull.
The setup includes four slipper springs, four shocks, and two center hanger boxes. It bolts over existing hangers and uses your current suspension bolts and U-bolts—though worn U-bolts are best replaced during the swap. With its clear layout and direct-fit parts, the install brings a big suspension upgrade without major modification.
Ratings & Reviews
Brooke M.
5/28/2025
Lauren is awesome! I'll be sure she sees your review, too. So happy to hear that she was able to point you in the direction and ultimately land you on something that is working well for you! Whatcha towing in the toy hauler?
Brooke M.
5/29/2025
Marc M.
6/27/2022
Finally took the trailer for a long trip with the new suspension. Worked very well in smoothing the ride for the trailer out. Very little movement of stuff in the trailer on the 4000 mile trip out I40 and back on I80. Both roads known to be less that smooth. I would do this conversion again, if I got a different trailer. Pretty straight forward installation on the side of my house.
Randy
11/23/2023
First year traveling our 5th Wheel without any suspension issues! Holding up well. Great product!
Mike L.
11/24/2023
Do you have a question about this Trailer Suspension Part?
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Gwendolyn Y.
7/8/2025
You really put this kit to the test! How was Alaska?