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When the bed or hitch is loaded down, rear-end sag affects steering, braking, and headlight aim. This system adds 8,000 lbs of load-leveling capacity with hollow rubber springs that mount above the axle. As weight increases, the springs get stiffer to keep the vehicle level and stable. The factory suspension still moves freely on light loads, but when you pile on weight from gear or equipment, these springs step in to hold things steady.
Heavy loads don’t have to mean a harsh ride. The Aeon hollow rubber design cushions bumps and rough pavement by taking the brunt of the road shock. Each spring absorbs vibration before it reaches the cab, improving ride comfort and reducing wear on factory leaf springs. The material’s elasticity gives more travel than microcellular urethane alternatives, so even under load the ride stays composed instead of jarring.
Uneven cargo or a quick swerve can throw a truck off balance. Each Timbren spring works on its own side of the axle, automatically engaging only when needed. This independent action helps compensate for off-center loads and cuts down on body roll when cornering. With both sides reacting separately, the truck stays flatter through turns and more stable in crosswinds or when a trailer begins to move around behind you.
Adding serious rear support doesn’t need air lines or adjustments. Custom brackets bolt directly to the frame—no drilling required—and hardware comes included. Once installed, there’s nothing to maintain or inflate; the springs engage when loaded and stay clear when empty. It’s a straightforward way to improve stability, reduce squat, and protect your suspension over years of towing or hauling heavy gear.
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
Tom E.
8/9/2026
Still working great! No issues. Other than being dirty, they look and perform like new.
Jerred H.
8/9/2026
James
7/27/2026
So far they have been fine. They are part of my suspension upgrades, along with stable loads and sway bar. I wasnt worried about harder ride when camper off, I wanted best suspension when camper was on. I would definitely recommend them.
Charles
2/8/2026
Excellent product. Does exactly what they were designed to do. I removed the sever duty extension. Now the ride is soft when unloaded. But yet smooth when towing or loaded heavy.
Andrew N.
2/9/2026
Eduard
12/11/2025
Great! After 20,0000 miles, Timbren Still keeps my truck Level and stable towing heavy loads.
Brandon
5/11/2021
After a year of towing some kind of trailer every week, the bump stops are showing some wear from riding on the bump stop pad on the axle. That being said, they are still working as intended and as good as the day I installed them. After a lot of miles, the only draw back is driving around with no trailer. Normal driving the ride isn’t effected but when you hit a bump in the road you really feel it hit the bump stop. You loose a fair amount of rear suspension travel with these but I’m used to it now.
Michael
3/13/2024
it has done just what I needed it to do, make the rear not sag when loaded with salt. It also has helped when pulling trailers and using the gooseneck trailer.
Andrew N.
3/13/2024
Ronald
3/27/2026
Still loving my Timbrens!
Gwendolyn Y.
3/27/2026
Brooke M.
12/29/2022
I see what youre saying here. From the photos, it looks like you have everything set up the way it should be. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.
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Heather A.
5/26/2026
Wow, that is exactly what we love to hear about these springs! That is a serious camper. Any plans with it this summer?