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Heavy loads can make the rear of your truck sag and lift the front, throwing off your steering, braking, and headlight aim. The Timbren Rear Suspension Enhancement System adds up to 6,000 lbs of extra support above the rear axle to keep things level and stable. The hollow rubber springs work with your factory suspension to resist squat and maintain even weight distribution between axles, so your truck feels steady when hauling or towing.
Bumps, potholes, and rough terrain can make a loaded truck bounce and jar. These Aeon hollow rubber springs act as shock absorbers by taking the brunt of road impacts. Their progressive design means they start soft for small bumps, then get more rigid as the load increases. The result is a smoother, more comfortable ride that protects your suspension and helps keep control on uneven ground.
When you corner or swerve to avoid something, each Timbren spring works on its own side of the vehicle. That independent action keeps off-center loads balanced and cuts down on body roll. With less sway transmitted from the truck to the trailer, crosswinds or sudden movements won’t send everything rocking back and forth. Your setup stays aligned and under control even on winding roads or gusty highways.
You don’t have to run air hoses or mount compressors—this kit bolts right in where your factory bump stops were. The vehicle-specific brackets, included hardware, and no-drill install make it a straightforward job with basic tools. Once mounted, the system needs no maintenance or adjustments, so you can focus on hauling instead of tuning.
Each kit includes two Aeon hollow rubber springs with custom brackets designed to handle real-world loads. The elastic rubber construction flexes more than hard urethane alternatives, giving it longer travel and better comfort when loaded. With a bump stop height of 5-1/8" and spacer height of 7/8", this setup is engineered for reliable support trip after trip—backed by a limited lifetime warranty and satisfaction guarantee.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Joe
5/18/2017
After one year of pulling our TT the Timbren springs are working just like the day they were installed. I cant see any compression of the springs after 15,000 miles of towing. I would recommend these springs to my friends.
Don
12/28/2018
I am completly satisfied with the timbren suspension aid. It stopped the body roll on my truck wirh my slidein camper on. Thanks for selling a quality product.
Buz E.
7/17/2020
Ive had the TGMRCK25S instled for over a year now and couldnt be happier. I have a 2007 GMC 2500HD with a Artic Fox 990 cab over camper. The body roll is minimal and overall stability ks greatly improved. Great product.
Jenny N.
6/6/2022
Since the springs are not an adjustable spring, some people feel that it does create a stiffer ride when not towing with a load on the truck. For a 2004 Chevy Silverado there is several alternate air bags available. I recommend taking a look at part # F2250 from Firestone. It works with 2 or 4 WD and with in bed hitches.
Sierra K.
10/7/2021
If you do test it without a full load and the ride is too rough, you can remove the spacer.
Doug
12/31/2023
One year update: Timbriens are still doing great! I would buy them again. I would not want to tow a 5th wheel with out them.
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Hawkeye
6/4/2024
So update after hooking up and towing my 38ft 5th wheel around last summer the Timbrens did quite well. Although they don’t eliminate all the rear sag they do eliminate most of it.