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When heavy gear or a trailer presses down on the rear, the Timbren Rear Suspension Enhancement System adds up to 3,600 lbs of load support. Its pair of Aeon hollow rubber springs sit above the axle to resist sag and keep the vehicle level. The added resistance helps maintain traction, steering, and braking balance by keeping more weight evenly distributed. You get a steady, level stance even when hauling or towing.
Each hollow rubber spring compresses in stages to cushion bumps and rough terrain. The convoluted design collapses along its folds for a soft initial response, then firms up as weight increases. That progressive action means you still have a comfortable ride when empty but solid support when loaded. The rubber construction works like a built-in shock absorber, taking the sting out of potholes and protecting the factory suspension from bottoming out.
When curves, uneven loads, or crosswinds try to throw off your balance, each side of the Timbren system works independently. One spring can compress while the other stays relaxed, helping control body roll and keeping the vehicle planted through corners or gusts. It also helps settle trailer sway faster by limiting how much motion transfers from trailer to vehicle.
Installation is straightforward with vehicle-specific brackets and hardware included. The setup replaces the factory axle bump stops and bolts onto existing frame points—no drilling required. Once in place, the 5-1/8" tall by 3-15/16" diameter springs are ready to go with no air lines, compressors, or adjustments to maintain. It’s an easy way to add real load support and stability without extra maintenance parts to worry about.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hey guys, it's Jake here with etrailer. Today we've got John with us from Timbren. He's gonna tell us a little bit more about what separates Timbren from the competitors. I appreciate it, I'm glad to be here. Timbren is a suspension specialist. We're based in Whitby, Ontario, so we are a true manufacturer in Canada and we offer a wide range of suspension products from light duty, from commercial all the way up to Overlander, Sprinter applications and trailers.
Now we've talked about a few of the options you guys have and we have plenty of options on our website. Right. We've got the SES kits. We've got the axle-less suspension. Right.
We've got your new coil inserts that just came out recently. But what would you say is your bread-and-butter at Timbren Yeah, no, our SES, suspension enhancement system, is definitely our bread-and-butter. Came out in 2011, won a SEMA New Product Award for best truck suspension. And really, the evolution you just mentioned here, you know, starting in 1968 all the way through now, 2024. But the SES kits are really the core of who we are.
And if you, if you would say at, in the level of stiffness on the market, what would you, would you put yourself in more in a heavy duty side for the SES kits or is it more of a lighter duty Yeah, great question. Lighter duty, we certainly can have a product for commercial and heavy duty, but in '82 when SES was introduced, it was purposely introduced for that, that light duty market. So we start with 1500 and again, go all the way up, but by far really popular with that 1500, 2500 crowd. That kinda leads me into my next question. So we talked about, your specialty is kind of in the lighter duty, but do you have an option for the heavier duty for your sprinter vans and maybe for your truck bed campers Yeah, absolutely.
We do have SES kits for truck beds, truck campers with a higher center of gravity. That creates a new kind of set of problems with the sway side to side. So we have severe duty kits for those. And it uses a single convoluted AON versus a double convoluted to tackle that problem of side to side. And the same thing with the sprinter van. It uses a rectangular shape Aon, but it's there to do the same deal that side to side sway because they're so top heavy, it'll eliminate that. Okay. And then we've had an instance here at etrailer that we had a van that was very, very heavy on the one side. Is there anything that you guys can do personally to help, I would say, I guess customize that kit for that particular user Yeah, by all means we would want that individual to contact us. We would ask a couple questions, see where that weight is distributed and we can actually produce an AON with either a stiffer hardness or durometer or a softer durometer and that will help level it out. So yes, we can take care of that for 'em. And I think that'll really, really help people to get their rigs dialed in because who knows what they're putting in the campers afterwards, after they buy 'em. They come from the manufacturer already heavy on that side and they're trying to load stuff on the other side to try to even it out. But knowing that there's a solution that you can customize for your rig no matter what the weight is on either side is really, really cool. Yeah, absolutely. We're happy to take care of 'em and again, there's no charge for that. Awesome. Now to kind of wrap things up, what sets Timbren apart from a lot of other manufacturers out there Well, I think there's a couple things. We're a family run company and our longevity, you can't deny, 1968 to 2024 and our warranty, we have a lifetime warranty regardless of how old it is. We will take care of it, replace it, limited lifetime warranty, and the hundred day money back guarantee. Very cool. And that's whether or not you're the first owner Right. And yeah, we're not asking for receipt, who'd you buy it from It'll be taken care of. Just give us a ring and we'll take care of it for you. Very cool. Well thank you again for meeting with us. Appreciate it. It was a pleasure to work with you. Thank you.
Ratings & Reviews
A very simple and straightforward installation once you get the oem bumper stops off (had a shop do that)
Timbren worked with me as I had a non OEM frame height (vehicle was lower than stock) to recommend the proper kit. Highly recommend contacting timbren if you are unsure of the proper kit to use. Ride is more stable. It does feel stiffer and less bouncy but am looking forward to seeing how it performs with my truck camper. Truck is a 1998 dodge ram 2500. Brake line over left side of axle needed to be secured to prevent damage.
The Timbren overload spring/bumper was east to install and did what it was supposed to do when I hitched up a camp trailer. These did not negatively affect the ride by any means and I don't have to worry about the troubles with air bags.
Stiffens and corrects kneel in rear end of 2023 Chevy Silverado 1500. You will notice a stiffening of the rear end suspension while unloaded, but it’s a fair trade off to prevent sagging and porpoising while towing. I found it easier to pull the rear wheels and work from the side than underneath the vehicle while installing.
The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.
It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.
Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.
Just got these on and haven’t been able to do a lot of testing yet, but it looks like they command their price. Huge difference in sag in the rear end of our Honda Pilot. As others have appeared to do in this review section before me, I started using a WDH with these and that looks to really be the winning combination with the Timbren SES. Our travel trailer is 3,500 lbs and it was squatting the pilot pretty well before. This timbren SES is a great addition. Can’t go wrong.
My F53 was like driving a waterbed down the road. With the Timbrens, it’s a different vehicle. Should have installed them years ago. Etrailer is my go to for anything trailer. FAST shipping and prompt responses to questions or concerns.
2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!
Can’t wait to see the difference in the ride with a load on
Fast shipping! Great communication. Have to get them installed.
I tow a 22' boat and was looking for something that would be maintenance free, easy to install, reasonably priced and not affect the handling of my truck when not towing. This product performs as advertised and I'm happy with the purchase.
These worked great to level my Durango while I was pulling my trailer without affecting the everyday ride. The only complaint I have is that they are apparently not completely secure. One of them fell out somewhere and now I have to buy a new set.
Lots of weight on 2005 Durango with loaded trailer. These things really keep Durango level and ride is nice. Real easy to install. No load on pothole road can be rough, but worth the price anyway. Have to give a little to get alittle. I would buy again for sure.
I have had these before and had some experience putting them on Jeep Wranglers. These are extremely easy to install on a 06 Dodge Durango. I needed some extra help for the tongue weight on pulling an enclosed trailer and these were the ticket! First round trip was 1500 miles and they performed perfectly.
put these in the other day. These went into the rear of a 2007 dodge durango. these snap in for the durango. I had a little difficulty putting them in. I ended up using alittle grease to get them in to place. Once they popped in they seemed pretty secure. The car right is alittle stiffer now which I expected. I personally like the ride better now. I have not towed the trailer yet which weighs 3000lbs-6000lbs on average but I feel confident the car will sit better while under load
I received this order quickly. I installed them without any problems and they do offer additional support as shown in etrailer's website. Seems like a good product so far.
Dave O.
5/5/2014
The product has worked as described on the website. They have been excellent as a suspension enhancement. My Durango used to squat 3 and one half inches before installation of the Timbren support. Now when hooking up my boat my Durango goes down 2 inches and stops. I have great support and better control of my vehicle especially when fully loaded on a family vacation. Great product.
I'm using them on a Chrysler Aspen (Durango) and they work great when loaded. When unloaded on the highway they do not allow enough suspension travel and cause a rougher ride. There are other types of stops that are progressive and would probably help with this problem.
I finally had a chance to try these out and they work great. Granted, I do have what they market an ultra-light travel trailer, but for my configuration of my 2007 Dodge Durango (4.7L), this trailer totals out about 75% of my towing capacity. That being said, this vehicle has an abnormally smooth ride for it's size. Because of this, the weight at the hitch creates a slight sag in the rear when weighted over 400 lbs. It also created some suspension characteristics I didn't like, like the slow bounce over undulations. I was advised my shocks were in perfect condition and utilizing stiffer shocks would not prevent the sag and would make the overall ride too tight for me. This was the reason for looking into this option.
Installation was as simple as it gets (pull off the old and put on the new). The only tools (if you want to call it that) are possibly a couple of 2x4 blocks (of course you're going to need a jack to jack up your vehicle). 4 inches total was needed to properly seat them. It took a total of 30 minutes, but 20 minutes was me pulling out my jack and jack stands, finding blocks, and taking my sweet time. My Durango rode as level as expected after installation. Photos would not show anything noticeable without actually measuring it (about 450 lbs on the tongue with my particular trailer - see photos). I also didn't have to adjust my mirrors, which was inherent in the slight sag I had before. It took bumps well and the ride was not as bouncy as before, more firm and controlled. The ride without the trailer is noticeably firmer, and with little bumps you can tell they're making contact. Mostly noticeable over speed bumps where my Durango would normally float over them due to the long travel. My Durango inherently didn't ride like a truck or large SUV, more like a sedan. Now, it "sorta" rides more like a truck. Not a deal breaker, but if you like your truck to keep riding smooth, these might not be for you.
Pros:
Works as advertised.
Easy installation.
Keeps your vehicle level.
Firmer more controlled ride. Removed annoying bounces.
Great quality build.
Cons:
With the clearance from your axel to your bump stop now ~1.5 inches, bumps will be felt if making contact (-1 star for me, but if this is not an issue for your application, you should add the star back).
Overall, I would highly recommend this product, even for a smaller SUV like my Dodge Durango. That being said, it won't have the same smooth ride with the long travel as before, but definitely worth it if you're towing with the same type of vehicle.
Arnell
3/25/2019
After a year of use, the product continues to perform as expected. I have specifically put about 6-8 trips with this product and I have not had any issues. This included many miles on the highways and some trail driving. The product continues to perform well, assisting on absorbing undulations and helps keep the vehicle stable and level. I did not mention this before, but its important to know that this product is only a supplement to an already stable suspension and correctly-weighted setup. If properly used, this product will enhance your driving experience, but it will not fix any overweight or setup issues. I still highly recommend this product.
I've had these on our tow rig for a year now and I added buy them again today if I needed them.these have worked much better than airbags for our coil spring rear suspension to handle the tongue weight of our trailer. The SUV sits level when the trailer is on and it handles bumps and sway better than the airbags did providing much more comfort to us in the vehicle. Unloaded, we don't really notice they are there, unless, we have all the kids and some friends loaded up and you will fell them work when going over bumps.i do all my maintenance on the vehicle's and inspect these regularly and I cant see any wear so far even though we've gone on 6 trips with our trailer with about 5000 miles doing so.
I cant say these are the best for every truck or SUV, but for ours it is the best and I definitely would recommend to others.
Mike L.
2/26/2026
Thank you Darrell, we're glad to hear your Timbrens are still on the job!
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Jack
4/27/2022
I have noticed no deterioration in performance since installation. These springs do what they are advertised to do and Im happy with the purchase.