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Heavy trailers and bed loads can push the rear of your truck down and lift the front, throwing off handling and braking. The Timbren Rear Suspension Enhancement System adds up to 8,600 lbs of extra support above the rear axle to keep things level. The hollow rubber springs sit about 1 inch above the axle when unloaded and progressively stiffen as weight is added. That means a smoother ride when empty, and firm, controlled support when loaded so steering, braking, and headlight aim stay right where they should.


Bumps, dips, and uneven pavement are easier to handle when the rubber springs take the hit instead of your suspension. Each Aeon hollow spring compresses under load to cushion impacts and reduce harsh jolts before they reach the frame. By acting as shock absorbers for the rear end, they help prevent bottoming out on rough roads and cut down on wear to your factory suspension.

When a trailer sways or a curve tries to push you off line, each spring works on its own to steady that side of the vehicle. The independent action helps control body roll during sharp turns or swerves, keeps off-center or uneven loads from leaning the truck, and calms trailer sway faster after wind gusts or passing traffic.


Installing load support doesn’t have to mean running hoses or wiring compressors. This system bolts directly onto existing frame mounts using vehicle-specific brackets and hardware. It replaces the factory bump stops with no drilling required. Once mounted, the springs need no adjustments or maintenance—just reliable support every time you hitch up or haul heavy cargo.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews

Brooke M.
12/14/2024
Thats awesome to hear, Steven! Its good seeing how much these can make a difference for someone hauling a heavy load! Timbren should make you a spokesperson ;)

Lazer S.
3/24/2026
Glad you like them, Chuck! Well, mostly anyway. I do hear these can be harsh when unloaded and it is probably the only real complaint we get about them. They definitely do one heck of a job when you are loaded up though! How often are you towing? And what do you typically tow?

Ben
5/8/2018
I still think these are an excellent alternative to bags and very cost effective. My only complaint is that on my 15 Ram 2500 I have to switch out the extra spacers when I’m not towing heavy. The axle and Timbren spacers make contact when unloaded and causes a harsh ride. The good news is that the extra spacers go in and out in minutes I don’t tow heavy very often. With the spacers in I am able to pull a 43’ toy hauler with little roll and excess bounce, an the truck sits fairly level
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Condition: Installed
Notes: There are install marks from previously being test fitted. All hardware is included.
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Gwendolyn Y.
3/26/2025
Where're you off to next, Mike?