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Heavy trailers or packed beds can make the rear end sag and throw off steering and braking. The Timbren Suspension Enhancement System adds up to 6,000 lbs of load-leveling capacity to keep your vehicle level and stable when towing or hauling. The hollow rubber springs sit above the rear axle to provide extra support as needed, improving handling and safety without changing ride height when unloaded.
Rough pavement, washboard dirt, or potholes can make a loaded ride harsh. Timbren’s hollow rubber springs act like built-in shock absorbers, taking the hit from bumps and uneven roads before it reaches the cab. The progressive design collapses along its folds under weight to stay soft for light loads and firm up as the load gets heavier, giving a smooth, stable ride in every situation.
When a gust of wind hits or a curve tries to push you around, each spring works independently to support its side of the vehicle. That helps reduce body roll and sway so you stay planted through sharp turns, uneven driveways, or off-center loads. The improved stability also helps keep your trailer in line for safer, more confident handling on the highway.
Timbren engineered this system for straightforward installation. The custom-fit brackets bolt directly onto each frame rail above the rear axle with no drilling required. Everything you need is included—two Aeon hollow rubber springs, brackets, and hardware—so you can install it with basic tools and get right back to towing or hauling with better control and comfort.
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
The Timbren SES is a simple solution for rear squat when towing. When hitched to my 30' Airstream Globetrotter (8800 GVWR) with a tongue weight around 1200 lbs, my Silverado 2500HD had a bit more squat than is ideal. I shopped airbags but didn't want to spend ~$2K for the set up and didn't want the hassle of installation and forever chasing air leaks. The Timbren SES literally installs on the Silverado in about 15 minutes. So simple. No bags, no compressor, no wiring, no air lines, no leaks. And WAY less expensive to boot. Just returned form a 600+ mile trip and it towed flawlessly.
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.
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!
Great upgrade when pulling our 6500lb travel trailer. Helps with sag and control on the road on our Ram 1500. Change the stock shocks and if you choose, upgrade your stock springs, and you'll get the most out of your half ton.
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!!
Takes the sag out for a bargain, but not as good as real springs
this fit perfectly on my 2016 nv2500. It really helped with my sag. would not hesitate to buy again.
Great product would recommend and buy again. Instalation was a snap did it in about 2 hours front and rear.
worked excellent on keeping the rear end up while towing. Did not change vehicle handling at all. Highly recommended. 2012 Nissan NV2500
Works as they should & definitely eliminate sag!
Seriously fast delivery!
Seriously the easiest installation ever!
Jack up the truck, Remove two bolts, set into place the new bump stops, install two bolts, job done!
Start to finish, Botha sides 30-minutes.
Great ride height, even better ride quality!
Anyone considering this product should definitely go with Timbren.
The Best!
So yes I can't believe it's been a year now but etrailer has emailed me to see how I have liked the products and if I have any issues which is great to hear their concern so to share with everyone my experience I've had them for about a year now before I installed them when I hooked my enclosed trailer on my vehicle would severely sag on my 2012 Envy 2500 not only did it sag to look like a joke but it also drove almost Dangerously because the trailer was so heavy on the back so I looked at all different ideas including air suspension but everything seemed too expensive for such an old vehicle and everything was all very complicated and involved so for my particular work van I was looking for something a little more simple that I could do myself and I magically came across these enlarged bump stops really because they replace the factory bump stops which originally were about the dimension of a single pack of cigarettes maybe a little shorter in length but about the same width and shape so when I got these I was super impressed because instead of it being about 4 in tall they are almost 7 in and they are also wider and much Solider rubber they are super super stiff rubber took about 10 minutes per side I did not have to Jack the vehicle up really all I did was go in the tire well and crawl under the van and undid the two nuts that held the factory one on and hooked up the stuff from e-trailer which again only took a few minutes I immediately noticed upon install that instead of having a few inches of space in between the bump stop in the frame that the new one was pretty much just about touching the frame with no weight on yet which means the bump stops are more or less going to hit the frame driving down the road whether I have a load on the back or not so I wasn't too sure how I would like that but I decided to move forward and took it for a test drive without the trailer on and I will say I noticed it to be a very solid hard ride especially going over speed bumps or potholes it was a very dense hard ride I almost did not like it at first so I got back home hooked my huge trailer on and immediately noticed how the van did not sag down but maybe a half inch which was a huge difference because the van still was set more or less at the factory height with no trailer on so I enjoyed the appearance immediately I also had to buy a new trailer hitch because I originally had a two or two and a half inch Riser on my hitch because as my van sagged two or three inches down it then made my trailer height wrong so once I fixed the SAG with the new bump stops and the van only dropped a half inch I ended up having to get a new trailer hitch and ball that was just a straight out version had no drop no rise just straight out and now my trailer sits at the correct height and my van does not sag so that was really nice to see and I did not mind spending the money on the new hitch insert and I even bought a new raw steel ball from e-trailer that day which has the highest weight rating even though it does rust a little but overall I immediately test drove the van and noticed going over speed bumps and potholes with the trailer on the back it was not nearly as hard of a ride and it was acceptable I also noticed stopping and going felt a lot more smooth there was no sag in the trailer hitch anymore and it just felt like the car was riding like it should at the correct levels in the front and the back but I will say this after about 2 weeks of driving it I think the bump stops might have softened up a little and the ride got a little better on the days that I do unhift the hitch now it has not changed the performance or how the vehicle sags when I hook the trailer on which is what makes me very happy that there's no loss in performance but I do notice that when I go over some of the same bumps that I did over the first few weeks driving home and to work that I don't feel that they are as severe or hard impact like I did the first few weeks so it appears that the rubber softened up just enough to make the ride more pleasant so hopefully everyone else has that same experience I live in Florida which we do get warmer weather here which might have something to do with softening in the hard hard rubber that they're made out of but either way visually they look exactly the same they haven't broken down or deteriorated in any way over the last year I drive my vehicle 5 days a week and sometimes 60 to 100 miles round trip for work and I drive a 8x10 aluminum enclosed trailer fully loaded with tools and everything else so far I'm super happy I'm actually looking at getting the bump stops for the front wheels that are round like softballs with hopes that I will have success they are also but I definitely recommend it the price is a little high but if you wait they do run promotions every once in awhile maybe save you a hundred bucks but they're worth it I don't have any regrets I just hope that they continue to outperform year after year and that my review does not change over time :-) :-) either way anyone looking to improve their NV 2500 or 1500 there are different options but I went with the heaviest weight rating with the anticipation of eventually pulling a dump trailer as I do construction and there are moments I need to hook up different trailers for different jobs but again much cheaper than doing air suspension and less problematic over time too because there is nothing to go bad there's no air to fill up or deflate they are just simply problematic free and I enjoy them very much
Victoria H.
1/29/2025
Hi Ryan, thank you so much for detailing your experience the Timbren bump stops! It sounds like you've gotten lots of good use out of them over the last year! It makes me glad to hear that these resolved the issue you had with leveling out your van, especially with towing multiple trailers for construction. It's also great that these held up well to the Florida heat with all of the miles you have put on them doing construction. What kind of things do you build? If you provide, your van's year, make, and model I can help you narrow down a good set of bump stops to fit your needs for the front axle suspension.
Ryan
1/28/2026
So quick update its been one year now and I can say that the bump stops are not only in the exact same place that they were when I installed them and this is after getting new tires and jacking the car up multiple times they have not shifted which was great they have not fallen out thank God :- they also have not lost the job that they have been doing since day one my van is still nice and level with the weight of the trailer even as I have added much more to the trailer they still keep the van level and they also are not as rigid as they were the first week that I had them on which I know I posted in the first review that for the first few days it was a very very solid bumpy ride and then after about a week or two I noticed it was not as aggressive when I hit bumps it was almost back to normal which was great and I also didnt have any new sagging in the back so the ride got more comfortable but the performance of the product stayed the same so I will say there is a slight break-in period I noticed some people posted reviews saying that the ride was too stiff when they installed them and they didnt like it well if I can give you any advice I would say to keep them on your car for at least a few weeks and I believe you will have the same experience as I did and you will notice that the stiffness and that stiff ride when you hit bumps will actually get better it just needs a little bit of time to break in but now having them on my van for over a year now I can say that it was the best investment especially consider the only other option was to do some expensive air suspension which would have been a lot of money and much more of a detailed installation process where these were so easy to install it was ridiculous when I did this over a year ago all I had to do was pretty much take the old bump stop off which didnt even require jacking the car up and then when I put the new Bump Stop in I just jacked it up just enough to get it in there which took me a matter of maybe 5 minutes per side it was so simple so yes you wont go wrong and I didnt get this product for free or any negotiation with the company this is just an honest person given an honest review and letting you guys know out there that if you had the same problem I had where your vehicle is sagging in the back when you hook up a trailer and youre looking for some type of resolution this will definitely get you there 100 And its much more reasonably priced than any other option and its an option you can do yourself you wont have to pay someone to do it someone else to get a resolution to the problem without going crazy financially
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Brooke M.
2/28/2025
That is awesome! Timbrens will definitely get the job done! What are you hauling?