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Heavy loads can make the back of your truck sag and throw off handling and braking. The Timbren Rear Suspension Enhancement System adds up to 3,000 lbs of support above the rear axle so your ride stays level under load. The hollow rubber springs stiffen progressively as weight increases, keeping steering steady, braking consistent, and headlights aimed where they should be whether you’re hauling gear or towing a trailer.

Bumpy roads and uneven pavement can beat up your suspension and make long trips uncomfortable. Timbren’s Aeon hollow rubber springs act like heavy-duty shock absorbers, taking the brunt of bumps and potholes so you don’t have to. The rubber construction cushions light loads and absorbs road shock before it reaches the cab, giving you a smoother, more stable ride and helping extend the life of your factory suspension.

When curves or crosswinds try to push your truck around, each Timbren spring works on its own to keep that side planted. This independent action cuts down on body roll when swerving or cornering and keeps off-center loads from leaning your truck to one side. The result is a ride that feels balanced and controlled even when conditions or cargo shift unexpectedly.

No need to run air lines or fuss with compressors—just bolt on the Timbren kit where the factory bump stops sit and you’re done. The system includes two Aeon hollow rubber springs, vehicle-specific brackets, and all required hardware for an easy, no-drill installation. Once installed, there’s nothing to maintain or adjust; the springs automatically add support only when needed so you can keep driving without extra upkeep.

Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews

Rick S.
1/29/2013
Since the Timbren install we have towed the camper on back roads with stop and go traffic as well as on the highway at 65 mph. The Pro4X does ride level and handles the added weight well. I wish I had a longer wheel base and a tandem axle trailer as on occasion we develop a slight up and down oscillation until the suspension settles down. It is noticeable when driving over long bridges. This is mainly due to the truck setup and not the Timbrens. We had this problem before the install and the Timbrens are making a difference.I have also hauled an estimated 780 lbs of hardwood flooring in the bed at 65mph and the truck handled it with no problem. It remained level and stable.


Dan S.
1/29/2015
After a year or more of hard use, the product is still going strong thanks for asking!

Dennis O.
1/18/2016
Still working great!!

Todd L.
8/20/2018
Works so good I forget it is there.

William
1/14/2025
Great! No complaints

Robin
11/14/2021
Excellent, good product

John
7/7/2025
Great it has helped my truck do much handle better the ride is awesome
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Sierra K.
9/8/2021
I am glad that Timbren handled this for you.