Timbren Rear Suspension Enhancement System
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2017 Kia Sportage
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2017 Kia Sportage
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Heavy trailers or bed loads can make the back of your vehicle sag and the front lift up, throwing off traction and steering. With a 17,200-lb capacity, this Timbren Rear Suspension Enhancement System adds the rear-axle support needed to keep things level and stable. The hollow rubber springs sit above the axle to share the load with your factory suspension, so braking and handling stay steady when you’re towing or hauling heavy gear.
Bumpy roads can beat up your suspension and make every pothole feel worse. These hollow rubber springs act like shock absorbers that take the brunt of bumps and rough surfaces. The extra cushioning smooths out the ride and lessens wear on your factory suspension by helping prevent bottoming out when the terrain gets rough.
When wind or uneven loads try to throw your ride off balance, each spring works independently to keep both sides steady. This helps reduce body roll in turns and keeps sway under control when towing a trailer or hauling off-center loads. The result is a more planted, predictable feel whether you’re rolling down the highway or pulling into a sloped driveway.
Installing this system is straightforward—custom brackets bolt to each frame rail above the rear axle, replacing the factory bump stops. Once mounted, there are no air lines, compressors, or gauges to deal with. The inch of clearance above the axle lets your stock suspension handle light loads normally, while the rubber springs automatically add support as weight increases for a balanced, no-fuss setup that’s ready for real work.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody. This is Jeff at etrailer.com. Today, we're gonna take a look at this Timbren rear suspension enhancement system. Now, this is a custom fit part. It is designed to fit the 2007 to 2008 Sterling SC7000 or SC8000 trucks that have the TUFTRAC rear axle. And it also fits the 2016 and newer Ford F-650 and F-750 trucks.
And on a custom fit part like this, I do like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this will work for your application. Now, this kit here will help improve suspension, the handling and safety on your vehicle. It will provide additional support as needed, so you always have a nice, smooth, comfortable ride. And it'll allow the leaf spring ample movement while cushioning any light loads. And it does not affect the empty ride of the vehicle.
What's nice about these springs is they do become more rigid as more weight is added. It increases the stability, provides great performance while hauling heavy loads, and it'll even help reduce vehicle sag. These will work independently side to side, help compensate for any off center loads, and it'll reduce body roll when swerving and turning corners. They do act as shock absorbers, taking the brunt of any bumps and rough roads. They do extend the life of your vehicle's suspension.
Now, this kit will include everything I laid out here on the table. It includes these four Aeon hollow rubber springs, the four vehicle mounting brackets, all the hardware you need for installation, and even a set of instructions that'll describe how these install. Now, these do install directly onto the frame. They do replace your axle bump stops on the frame. And drilling is required for installation.
Capacity on this kit is 17,200 pounds. Now, Timbren springs will not increase your vehicle's weight carrying capacity. So, you still wanna make sure not to exceed the manufacturer's recommended weight limit. And again, these are designed to work with a suspension system that is in good working order. But that should do it for the review on this Timbren rear suspension enhancement system..
Ratings & Reviews
Feels like it was a real help on the suspension but need about a year to get the full opinion on different roads.
Received the Timbren SES kit in today's mail around 11:30AM, already installed on my 2024 F-150 pickup's rear differential before 3:00PM same day. Like always etrailer's fast delivery time and product info with installation video on your website are very helpful. 1st photo OEM bump-stop, 2nd photo OEM bump-stop removed, 3rd & 4th photo Timbren SES kit installed.
Accolade XT 35L - Timbren SES (TFRSDE - 12k support) loaded in the sweet spot.
These Timbrens should be used on F600 and F550 models. Do NOT use the spacers that come in the box. Just install the Timbrens without the spacers and you are good to go. When FULLY loaded (full gas/water and gear), the Timbrens should compress about 1/2”, which seems to be the sweet spot. The end results are as follows:
1. Better bump absorption and much better rebound. The inside chatter is more of a low sounding rumble and the suspension rebound is really quick.
2. Much better sway control and overall stability.
3. The drive feels more balanced front to rear. The rear drop was reduced by 1”. I think that allows the leaf springs and shocks to work in a more neutral position.
These are worth every penny and are a cheap “set it and forget it”way to improve your ride quality!
1.5" gap... it came with 1 spacer for each side. if i buy the spacer kit, what size are they ? i have a 2026 f350.
Helps prevent about 1/2" of sag with my 175lb-tongue weight trailer and easy to install.
Added these to my F250 Super Duty. I carry a golf cart on a Diamond back bed cover. Can be a little top heavy. Perfect addition to my suspension- greatly reduced the sway.
Easy to install using basic hand tools, and stopped the "sag" when I hook up my Casita travel trailer
Great product. The ride and body roll at the rear axle are notceably improved (1989 Ford E350 Class C RV , 27 ft). I give it 4 stars because the installation was slightly complicated due to the rear brake lines needing to be slightly bent to provide clearance for the U bolts supplied in the kit. Great product and wish it came in a 5000 lb version.
2,000 miles in on a trip from the east coast to the Canadian Rockies these work great while loaded and towing. Close to zero bounce while towing, I love them. Unloaded, however, the ride in my 2026 Tundra has gone south. There is a noticeable, abrupt stop of the units hitting the axle when going over any kind of bump. When I get home and back to regular driving, I may just take them off, its that bad.
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.
Well they are exactly what I thought it would be. Hard for me to say it's what I needed yet.
I installed them on a homemade trailer from a salvaged 2001 base model tacoma. Once I get finished building it out and have some weight in it I'll have a better idea. But from what I've seen so far on a couple test drives they should come into effect when needed.
For reference I building an Tacoma based trailer with an ARE Contractor topper with a Naturnest roof top tent on the very top. So to counter and sway these should be very helpful. At least I hope so. I'm not an engineer but I did stay at an Holliday Inn once.
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.
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.
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.
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!!
Easy install took about 20 minutes on my 2017 Ram 3500 SRW. Had about 1/2 inch clearance as recommended. Loaded up my 5th wheel (2350 hitch weight) and about 200 lbs of gear in the bed. Just got back from a 800 mile camping trip through mountains of TN. You can really feel the difference around those sharp corners and uneven surfaces. The truck felt firm and controlled not hard and jarring as some have mentioned. Going over those overpasses with the wonderfully smooth (Not) joists was greatly improved. The truck would squat and rebound again, with a firm controlled response. Driving without a load felt the same as before without them. I would highly recommend these! Ordering from etrailer continues to be my go to option!
Timbren SES is an excellent upgrade for our 2020 Nexus Wraith motorhome. I definetly reduces sway and smoothes out the ride significantly. I also gained a little over 2" in ride height, more of reuced sag than a suspension lift. Highy recommend this upgrade.
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