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Heavy trailers and bed loads can make the back end sag and throw off steering. The Timbren Rear Suspension Enhancement System adds up to 8,600 lbs of extra support above the rear axle to keep your truck level under load. The hollow Aeon rubber springs get more rigid as weight increases, so the squat disappears and the ride stays steady when hauling gear or pulling a 5th wheel.
Every bump and pothole can rattle a loaded suspension. These hollow rubber springs take the brunt of the impact, absorbing road shock before it hits the frame. The progressive design cushions light loads for a comfortable ride but firms up automatically as weight builds. The result is better control and less wear on your factory suspension.
When a gust or curve tries to shift your load, each spring reacts on its own side to keep things balanced. That side-to-side independence cuts down on body roll, sway, and bounce, so your truck feels planted through corners or when a semi blows past. It also helps manage uneven loads without upsetting handling.
Getting more stability doesn’t have to mean adding compressors or running hoses. This setup bolts onto existing frame points in place of the factory bump stops, using vehicle-specific brackets and included hardware. With no drilling required, it’s an easy upgrade that takes only basic tools to install and needs zero maintenance after it’s on.
The elastic rubber build gives these springs more travel than rigid alternatives, keeping the ride comfortable while handling serious weight. They work seamlessly with your factory suspension in good condition to prevent bottoming out, reduce strain on components, and extend suspension life—all while keeping your truck level every time you tow or haul.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Kb T.
8/5/2024
Year Review: I have put about 5k towing miles on these since the install, who ever says you slow down after retirement doesn’t know my wife… and they are still performing great. Material has held up with no signs of cracking or excessive wear. Love the ride feel when going over rough roads and turns. Very happy with this purchase.
James D.
5/11/2026
KB thanks for your response! We really appreciate you pointing out the improved control without sacrificing ride quality when unloaded, that’s exactly what most folks are hoping for.
Michael
3/14/2019
Couldnt be happier George. I brag about them to others all the time.
Michael
3/19/2019
Still loving my Timbrens!
Heather A.
7/14/2018
I took a look at your photo and I can not tell if the spring is directly above the axle but if it is, the spring will hit the axle before it hits the brake line. There are elongated holes in the brackets that allow for some adjustment. The best thing you can do is move the spring as center over the axle as possible.
Scott
3/23/2026
Very good the rear suspension works much better when towing my 35 foot travel trailer, especially when the road is ruff, the rear trimbren suspension does not touch the axels until a heavy load is on the rear axles, which helps very much with ride and vibration from the road
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Nick S.
12/15/2025
I am glad to hear they helped with both the sway as well as the rear sag with the camper! Not adjustable like airbags but they do the trick. What kind of camper do you have?