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When heavy trailers or bed loads make the rear end sag, the Timbren Rear Suspension Enhancement System adds up to 6,000 lbs of support above the axle. The hollow rubber springs work with your existing suspension to keep your ride level and maintain steering, braking, and traction. With the truck sitting level, you get better control, safer handling, and proper headlight aim even when towing or hauling serious weight.

These hollow rubber springs act as cushions between your frame and axle, soaking up bumps and rough terrain so your ride stays comfortable. The progressive spring rate design means they stay soft with light loads but stiffen automatically as weight increases. That extra give helps prevent bottoming out while extending the life of your factory suspension components.

Each spring works on its own to support the driver and passenger sides separately. This independent action reduces body roll when cornering and helps keep you stable when hauling uneven or off-center loads. When wind or trailer sway hits, the springs help your vehicle stay planted so both you and your trailer track straight down the highway.


The system includes two Aeon hollow rubber springs with vehicle-specific brackets and hardware that replace your factory bump stops. They bolt directly to the frame rails above the axle with no drilling required. Once installed, there are no air lines or compressors to manage—just dependable load support that adjusts automatically whenever you hook up a trailer or load the bed.


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi there. I'm Michael with etrailer.com. Today, we're gonna take a quick look at this Timbren rear suspension enhancement system. These are Aeon hollow rubber springs. These are gonna replace the actual bump stops on the frame of your motorhome to help improve the handling and safety of your motorhome. These do have a custom fit bracket, so they are going to work with several different models.
Your early 2,000 motorhomes. Including specific year ranges of the makes and models that you see on the screen there. To ensure that these are going to work for you, I would highly encourage you to come to etrailer.com. We have a vehicle fit guide, so you can just select your year, make and model of your motorhome. And it will ensure that these are the right fit for you.
Or if they're not, we'll have other components that will be a fit for your motorhome, to help you make sure that everything's gonna work well for you. But these are specific brackets, so it's gonna be very easy to get these installed right in place of those factory bump stops. Basically, just have to pull those factory bump stops off, put these in their place, and you're gonna be ready to go. You're not gonna have to worry about drilling, or customizing, or anything like that. So, these are gonna do a really good job.
Providing additional support to your motorhome. To give you a more smooth and more comfortable ride as you're going down the road. These do have a weight capacity of 6,000 pounds. Now, when you hear that, it's very tempting to think that that means that these are going to increase your motorhome's carrying capacity by 6,000 pounds and that's not the case. There's no vehicle suspension enhancement system that I'm aware of that will increase your vehicle's or motorhome's carrying capacity, because this is just one component in a whole setup system.
So, these are going to be less like a second set of hands that's helping you lift more weight. Think of them more like a back brace. So, they're there to just kind of help give support. Make sure that your suspension is not going to be taking too heavy of a load. It's gonna help to just improve the suspension system. It's not going to help it carry any more weight. These are a rubber spring. So, that's gonna be really nice in ensuring that it's going to give us a nice cushion effect. So if we have a light load, our tanks are getting close to being empty, that sort of thing, they're not gonna engage very hard. They're gonna be nice and soft to kind of give us that more comfortable cushion effect. If we have full tanks of water full for the weekend or whatnot, these will help to engage a little bit more firm, more weight we put on them. So, it would give us a little bit more support to compensate for that heavy load. These will act as shock absorbers. So, as we're going down the road, if we hit potholes and that sort of thing, we're going to take the brunt of those bumps and shocks. So, it's gonna make it a much smoother ride for us, and help to extend our suspension's life. These do work independently. So, there's gonna be one on your driver's side, and one on your passenger side. And again, they do absorb that shock and weight independently. So, you have all your water tanks on one side. This side is going to get firmer to help support that weight. And the other side is not gonna be affected at all, so it's still available to have that nice light, shock absorbing capability. So it's gonna be really nice, especially for helping to reduce your body roll when you're swerving or taking corners. It's gonna help to work independently to make that a nice, smooth ride for you to help with your motorhome. Obviously, motorhomes tend to be very top heavy, so you get a lot of sway. These will help to alleviate some of that, so that you get a little bit more balance to feel like you're more in control. These do come with a limited lifetime warranty. So if for any reason, once you get them installed, they're not doing what you thought they we're gonna do, you can return them. You can always reach out to us. We're always happy to work with our customers. Make sure that you're getting a good quality product. But overall, I think you're gonna be very happy with this. There are several other options that you can add on in addition to these, to help with that stability. There's sway bars and that sort of thing. So, this might not be the end all of your enhancement process. There might be others that you want to consider adding on as well. But these are gonna do a good job of helping to absorb some of that shock for your motorhome, and help that stability. So, really nice option here. If you do have one of those vehicles that this is going to fit. These are gonna be very easy to get installed, so definitely something that you can do on your own. You don't have to take it into a shop, or something like that. And it's gonna be a quick fix to help give you a little bit more stability, and comfort for your motorhome. So, that's gonna complete our look for today. Again, I'm Michael with etrailer.com. Thanks for watching..
Ratings & Reviews

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

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.


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!

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!

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.
4/23/2026
Niiiice, I see what you did there!! That looks like a sweet setup!


Mike L.
4/2/2026
Glad to hear they worked well for you Jerrod. Hope you had a good trip!

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
I am happy to see we had some suspension support for you Benjamin! What kind of trailer are you towing?

Heather A.
2/21/2025
Timbrens are the best for sag because they are made of dense rubber. 6500 lbs sounds like one heck of a travel trailer, what is it? Any fun plans this summer?


Jerome
3/2/2026
Awesome product. Would recommend.

James D.
7/24/2026
We're glad to hear the Timbren suspension system is already making a difference. We'd love to hear how it performs over time. What are you using your vehicle for most often; towing, hauling, or everyday driving? Thanks for your review and we appreciate you choosing etrailer!

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!

Claire H.
7/14/2026
Wow! That is quite a difference between your factory bump stop and the Timbrens! Definitely let us know how they perform for you!
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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.