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Heavy trailers and full beds can make the rear of your ride sag and the nose lift, throwing off steering and braking. This Timbren Suspension Enhancement System adds up to 3,000 lbs of load-leveling capacity to keep things even when you’re towing or hauling gear. The hollow rubber springs sit above the rear axle to help stabilize your vehicle and maintain proper ride height so handling, traction, and braking stay consistent even under heavy weight.
Bumpy roads and uneven terrain can wear you out fast. Timbren’s Aeon hollow rubber springs act as shock absorbers, taking the brunt of bumps and rough roads while cushioning light loads. Their progressive design means they stay soft under lighter weight but become more rigid as load increases, smoothing out small jolts while providing strong support when you need it most.
Crosswinds, curves, or off-center cargo can make your truck lean and sway. Each Timbren spring works independently on its side of the vehicle to reduce body roll and improve stability when swerving or cornering. That independent action also helps balance uneven loads so your vehicle feels more planted and predictable through turns and windy stretches.
Every bump, load, or trailer tug puts stress on factory suspension parts. These hollow rubber springs help prevent bottoming out and reduce wear on leaf springs by adding cushion where it’s needed most. The system installs directly onto the frame with custom-fit brackets—no drilling required—and delivers reliable, maintenance-free support for towing and hauling without air lines or compressors to manage.
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.
Today we're gonna be taking a look at a popular upgrade for your pickup trucks. It's the Timbren Suspension Enhancement System. All you gotta do is put your vehicle in the fit guide, just to get the kit that'll have a custom bracket so it'll fit the truck. There's a lot of different ways that you can beef up your suspension and a lot of options on our site. But I like these the best, because it literally took me maybe 15 minutes to install. So if I we're to compare this to airbags, airbags are kind of a pain, you have to run airlines you probably need a compressor.
And if you don't get a compressor, you gotta run out and air them up. They're a little bit more customizable, but you don't really have it completely dialed in. With this, the stop is exactly where it is, and as your suspension starts to sag, it'll kick in right away and there's a lot less maintenance and it's the most cost effective way to kinda beef up your suspension. So if you want my opinion, this is the way to go. So here is what we added today.
So we basically just replaced the factory bump stops. So there's a lot of different situations where we're gonna really need these. We'll notice the gap down here. We're gonna have a lot less of a gap than we did with the factory system. So, if your vehicle sags under a load whenever you have a lot of stuff in here.
You have a 450, you're planning on doing some pretty big stuff with it, so a lot of the times it'll make your headlights just go way up bright and you're blinding everybody that you're driving against. Also with less of a load on the front wheels, we are going to have a little bit less good steering and handling just because of the weight transferred to the back. So, you bought a big old truck, you're planning on doing quite a lot of heavy hauling, so this isn't going to increase our capacity of our truck. It is gonna have a limit of 12,000 pounds, but it is going to do a lot for you, what Well, a lot of that sag whenever you have a lot of load in the back, what happens is it starts going like that. One, you're gonna be that guy on the highway that everybody's flashing lights at because once your front end starts to raise, it's gonna look like high beams and you're gonna be blinding everybody.
You don't wanna be that guy, trust me. Also, whenever that weight kinda transfers to the back, there's gonna be less weight on the front. So less weight on the front, that's what steers. We're not gonna have near as good of handling as if we have these on, and it's a little bit more level to where we keep the weight kinda distributed a little bit more. Also with the leaf springs, they're gonna engage a lot quicker with the Timbren Suspension System. So your leaf springs aren't gonna be working a whole lot. It's gonna limit trailer sway and all sorts of stuff. So if you really just wanna kind of protect your truck and just make the whole riding experience a little bit nicer, it's definitely the way to go. Whether you're hauling with a ball mount, or a gooseneck or fifth wheel, it's not gonna have any interference with the gooseneck or fifth wheels in the bed of your truck. So you don't have to worry about that. Some of you guys we're wondering, and Adam's saying, it's not gonna be a problem. So one, I like the black color, 'cause it doesn't really stick out like the factory ones. And also these are a lot smaller than the ones we put on here, there's only about a finger's length in between there. So they're definitely gonna engage even with some of the lighter loads. And that'll do it for a look at the Timbren Suspension Enhancement, and I'm Adam with etrailer..
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
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.
Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?
Jay S.
8/14/2026
Now that its been a year Im very impressed with them. Theres no ride detriment without the 5th wheel attached and they do a great job of mitigating squat
Christopher H.
9/3/2026
Happy to hear the Timbrens are making that big of a difference Tony. Thanks for including the photo and we appreciate the kind words! Have you taken any longer trips with the Timbrens installed?
Jesse M.
9/10/2026
Awesome! Glad to hear the Timbrens made such a big difference in the ride quality. Thanks for sharing! Happy travels!
Brooke M.
5/7/2025
Wow, thank you for sticking with us, Don! That is awesome. I think you made an excellent choice here. Timbrens are tough and the heavy duty are SUPER tough. Glad to hear these were a good fit. Love the photos! Is that your own property?
Don
5/21/2026
The TIMBRENs work as stated during when I am pulling anything heavy. However, when the truck is not pulling anything, anyone riding in the rear seat gets a very hard jarring jolt when driving over any roadway repairs, bumps, expansion joints on bridges. I wished that I would have went with the Super Springs, or the Road Active Suspension. I may replace the TIMBRENS later.
Gwendolyn Y.
5/21/2026
Kate F.
5/6/2026
Glad to hear the Timbren systems worked out so well for your RAM Van Mitchell! It’s great that you noticed the smoother, more progressive response compared to the factory bump stops, especially under load. Thanks for sharing your experience with both the front and rear installs, that’s really helpful for others considering the upgrade. What kind of loads are you usually hauling with your van?
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.
Kate F.
7/13/2026
Bud, thank you so much for taking the time to leave a review! I'm glad to hear the suspension upgrade helped reduce the sagging and porpoising while towing. I also really appreciate you including the installation pictures and sharing your tip about removing the rear wheels. I'm sure that will help the next person tackling the install. Thanks again for choosing etrailer!
Heather A.
4/24/2026
Hi there, thanks for reaching out, that’s actually a common issue with this type of trim. The one you tried is a standard flat insert, but some RVs (like your NOBO) use a slightly domed trim to help it sit over the screw heads in the track. If the screws stick up even a little, a flat trim won’t fully snap in place, which sounds like what you’re running into. The best way to find the right replacement is to remove a small piece of your original trim, lay it flat, and measure the full width from edge to edge. Most are either 3/4" or 1", but the shape matters too, not just the width. If yours has that domed profile, you’ll want something similar or a softer vinyl that can flex over the screws. If you’re able to send a quick photo of your track or old trim, I’d be happy to help you find a better match.
Mike L.
4/2/2026
Glad to hear they worked well for you Jerrod. Hope you had a good trip!
Mike L.
4/23/2026
Niiiice, I see what you did there!! That looks like a sweet setup!
Mike L.
4/23/2026
Lazer S.
7/20/2026
Glad they are working well for you, Kevin! Well, while you are towing, that is. We have heard that these can be pretty rough when unloaded, but work great when you are loaded. A quick release function on these would make taking them off when not towing a lot easier. I may pitch that to Timbren to see if they can work something out. I will tell them to call it something like the Kevin Device if they agree! ^___^ Sounds like quite the trip! What has been your favorite stop so far?
Mike L.
2/26/2026
Thank you Darrell, we're glad to hear your Timbrens are still on the job!
Kate F.
4/23/2026
Thanks for sharing your experience Thomas. It is great to hear the Timbrens made a noticeable difference in ride quality and reduced body roll on your E350 Class C. We also appreciate the heads-up on the install. That kind of real-world feedback about brake line clearance is very helpful for others working on a similar setup. Would be nice if they had a stronger option, if you need the 5K, might need to go to airbags, but who wants to deal with having to air up if you don't need to. Where are you off to on the next adventure?
Mike L.
7/7/2026
Nice setup David, thanks for the photo!
Kate F.
5/6/2026
Glad we had the right suspension upgrade to help with the squat Dennis! How is the ride when you are unloaded?
Kate F.
8/31/2026
With the Timbrens, you will want to have a 1/2" to 1-1/2" gap when the vehicle is unloaded. They are only designed to engage when the suspension is under load and you need the additional support. If you want to reduce that gap so the Timbrens engage sooner, you can add the 1/2" Spacer # TA25722-90P00 or the 1" Spacer # A25723-90AH00.
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Robin H.
9/22/2026
Thanks for taking the time to share such a detailed review and all of the pictures! The unloaded ride is a concern we hear fairly often with SES upgrades, so your experience with the 1" gap and rough-road testing will be really helpful to others considering these for their F-250. We appreciate the kind words about Naomi and our team as well. Looking forward to your update once you get some miles on them with the Rockwood!