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Heavy cargo, campers, or trailers can make the rear sag and steering feel light. The Timbren Rear Suspension Enhancement System adds up to 2,400 lbs of rear axle support to keep things level under load. Its hollow rubber springs sit above the axle and get more rigid as weight increases, keeping your ride height even so braking and handling stay predictable.
When the road gets rough or uneven, these Aeon hollow rubber springs take the hit before it reaches the cabin. They act like built-in shock absorbers, softening bumps and helping your suspension avoid bottoming out. You get a smoother, more stable ride while reducing wear on your factory suspension components.
Each spring works on its own, so side-to-side loads or sharp turns don’t throw the vehicle off balance. This independent action helps control body roll when swerving or cornering and keeps things stable when a trailer starts to sway from wind or passing traffic. The result is less bounce, less lean, and a more controlled feel behind the wheel.
There’s no compressor, air hose, or gauge to deal with—just bolt the custom brackets onto the frame rails using the included hardware. The springs replace your factory bump stops and sit about 1" above the axle so your stock suspension still handles light loads normally. That inch of clearance gives you a comfortable unloaded ride with instant support when weight is added.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
Michael
9/10/2023
After a year, the Timbren helper springs still work like new. Its made a noticeable improvement in the way my Sienna drives when its fully loaded with people, or I have bicycles on the hitch rack. I definitely still recommend them to other Sienna owners. Youll be glad you had them installed.
Dependable A.
4/25/2015
Apparently still good, I havent heard otherwise and I have seen my customer since then.
Brooke M.
5/4/2022
Thank you for letting us know. Our customer service team should be reaching out to you soon.
Sierra K.
12/7/2021
Customer Service will reach out to you.
Jenny N.
5/23/2022
I will have our Customer Service team reach out to you.
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Jenny N.
4/8/2022
The manufacturer will reach out to you.