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Heavy trailers, campers, or bed cargo can make the rear end sag and the front lift. The Timbren Suspension Enhancement System adds up to 6,000 lbs of load-leveling support to keep your vehicle level and steady. The hollow rubber springs sit above the rear axle and work with your factory suspension so steering, traction, and braking stay consistent even when you’re hauling serious weight.

When bumps or dips hit, these Aeon hollow rubber springs compress gradually for a smoother ride. The convoluted design collapses along its folds first, then stiffens as weight increases. That means it stays soft and comfortable under light loads but firms up automatically when you’re towing or hauling heavy gear. It absorbs road shock, reduces bounce, and helps prevent bottoming out on rough terrain.

Each Timbren spring works on its own side of the vehicle to cut down on sway and body roll. When you swerve or take a corner, the springs respond independently to keep the vehicle planted. This independent action also helps when loads are off-center—keeping both sides balanced and improving control if a gust of wind hits your trailer or a semi passes you on the highway.


There’s no air compressor, hoses, or gauges to deal with—just bolt the custom-fit brackets onto the frame above the rear axle. Each spring sits about 1 inch above the axle for normal ride comfort when unloaded. With included hardware and no drilling required, this suspension upgrade installs easily in your driveway so you can get back to towing or hauling with confidence.
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello neighbors, welcome back. I'm Steven here at etrailer.com. Today, you're joining me where we look at these Timbren Suspension Enhancement System for the rear axle. Now folks, this is a custom fit. It's gonna fit a 2023 through the current year Toyota Sequoias. Make sure you're using our fit guide at etrailer.com, top center of our page.
Enter the year, make, and model, and we'll get you the right parts the first time. And what these do, folks, if you're not familiar with them, they basically improve suspension and handling and overall safety by providing additional support when you need it the most to have the most comfortable smooth ride possible. And what they do is they allow your leaf spring ample movement while cushioning light loads, and they actually become more rigid or more stiff when they're compressed and you have more weight, which is gonna give you greater performance when you have those higher, heavier loads. It can help reduce sag, increased stability, they work independently side to side, and they also help compensate for off-center loads. They're gonna help you reduce body roll, like if you have to swerve or you turn a corner too tight.
And they also act as a basic shock absorber. They'll take a lot of the bumps, the rough road out of your ride, that kind of stuff. They will technically extend the life of your vehicle suspension because this will take most of that brunt of those constant bumps and that kind of stuff. Now what these are is they are two Aeon hollow rubber springs with custom brackets and spacers. I've got 'em just loosely put together here, but real simply, it's got a spacer block here.
You got the hollow rubber Aeon spring. There's a big washer in there that you saw, the nut goes underneath there. This gets bolted down into place. And then you use the existing hardware off of your factory bump stop that you removed, and this goes right back in place where that factory one came off of using the same hardware. So, pretty quick, easy install, no drilling whatsoever required.
It installs directly into your frame. You've already got pre-threaded holes there. This just simply replaces that. You put it right back in place where the old one was. Now this will give you a load level capacity of 6,000 pounds. Keep in mind, this is, again, just an enhancement. You're not adding any extra capacity to your vehicle. I think a lot of people get these kind of things and they think, "Oh, now I can haul 6,000 more pounds." That's not the case. Again, this is just a load leveling capacity. So it's helping your current factory suspension by giving it a little boost that it needs to keep everything level and that kind of thing. Well folks, that's gonna do it for our look today at this Timbren Suspension Enhancement System for your rear axle. I'm Steve here at etrailer.com. Thank you so much for your time. Thanks for watching. Have fun installing these.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews

Lazer S.
6/16/2026
They definitely look like they are helping, Orlando! How are they when you aren't towing? We hear a lot of people say they can be pretty harsh when unloaded.

Brooke M.
6/22/2025
Definitely let us know how it goes after your trip, Fred! I hope they are just what you needed and I think they will be :) Where are you going on for your getaway?
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Christopher H.
8/14/2026
Love hearing this! Really appreciate the detailed feedback and photos. That extra stability when you're loaded up can make a huge difference. And installing them at 11 at night—that's commitment. Hope they treat you just as well on those mountain roads. Safe travels and we'll definitely make sure Dee Dee gets the shoutout.