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When you’re hauling serious weight, squat and sag can throw off handling and braking. The Timbren Suspension Enhancement System uses 8,000-lb capacity hollow rubber springs mounted above the rear axle to keep the vehicle level and stable under load. The progressive spring design gets stiffer as more weight is added, maintaining ride height and helping prevent rear-end sag when towing or carrying heavy gear.
Heavy loads can make every bump feel like a pothole. These Timbren springs act as built-in shock absorbers, taking the brunt of bumps and rough roads. The rubber construction cushions lighter loads while keeping enough flex for a smooth, comfortable ride. By preventing bottoming out, they also reduce wear on factory suspension components so everything lasts longer.
When crosswinds push your trailer or you hit uneven ground, each Timbren spring works independently to keep its side planted. That means less sway, less body roll, and better control through curves or uneven terrain. The improved stability also helps your trailer track straighter by cutting down on movement that transfers from truck to trailer.
Setup is quick with custom brackets that bolt directly to the frame—no drilling or air lines to run. Each kit includes two Aeon hollow rubber springs, brackets, and hardware for a straightforward install using basic tools. Once installed, the system works automatically with your factory suspension to handle weight without any adjustments needed.
For trucks carrying slide-in campers, in-bed salt spreaders, or other constant heavy gear, this severe service setup delivers dependable support day after day. It’s built to keep the vehicle level and secure even under maximum load while maintaining stability for safer steering, traction, and braking performance.
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
Customer Satisfaction Score:
86% were satisfied with this product
14% of customers were not satisfied
Ratings & Reviews
Easy to install. Pickup remained level with loaded trailer. Got exactly what I wanted.
Fast shipping and great price. I could not be happier with July purchase.
Super easy to install, let's see how long they last. The local truck camper dealer says he has been installing them for 10 years and no failures.
Worked great. Fixed my sway issue on my 2020 Ram 2500 with a truck camper.
Before, my 2017 Ram 2500 (SRW) would wobble and shake between 35 and 0 mph. I installed them yesterday and it was just as easy as advertised. Today, I loaded my Lance 1130 and did a road test. After, I reached 75 mph and there was no vibration, rocking or squatting. Problem completely solved.
Not happy with them at all. They have made the ride of my truck very rough. Plan on returning them.
Very easy to install. Does exactly what they say it will do. I no longer experience the sag, roll, and sway that is associated with Ram 2500 coil suspension.
Work as advertised is a great support system for my pick up camper. Very easy to install .. i’m leaving a star off because it was not designed to sit perfectly on top of my axle the bottom hangs off a bit 1/2-3/4” so I’m not getting the full support that I should
2017 ram 2500 with coil springs. Wast of time, install with 1” spacer, truck road like a box of rocks, could feel every little bump, took 1” spacer off not much better at all, way to stiff of a ride, when you hit a bump you new it. Parts are already in box to go back. Not any fault or etrailer at all, they don’t make the product just sell it.
Excellent product. World of a difference when towing my 5th wheel. 2018 Ram 2500 megacab with a 90 gallon auxiliary transfer tank
Installation was a breeze took about 20 minutes to install. I have a Travel Lite 840SBRX slide in camper on my 2015 RAM 2500 4x4 SB. My truck is lifted in the front for a level ride and when the camper was loaded it had little to no squat in the rear at all. The ride without a load is stiffer but not bad. Loaded with camper and they worked perfect. No roll in the corners and no porpoising.
They went on pretty easy. Except having to deal with the emergency break line we had to disconnect but that’s not your fault. And the hole order and delivery was very easy and they arrived in quick time. I will order from you again. I’m very satisfied.
Installed on a 2020 Dodge 2500. The ride when empty is awful. Like riding in a wagon it is so stiff. I took out the round disk to give a little play between the stop and diff. Loaded my 4 Wheeler on a trailer and it was terrible. I hate to hook up my 34 foot toy hauler. I'm afraid the truck will beat me to death, it is so stiff.
Therebis absolutely no give here. I am surely disappointed and will remove these and try something else. Air bags
Bought them to remedy sway problem my rig (2020 Ram 2500 Hemi, with slide in camper) experienced recently. I was debating between add Timbren and a stronger sway bar. Decided to try Timbren first for cheaper price and ease of installation. Just returned from a camping trip from Tahoe last night without a single case of sway during 500 miles of driving. Highly recommend this product.
Watched numerous videos highlighting the Timbren SES and how to install on my 2019 RAM 2500. It seemed like a good idea due to the fact I tow a 5th wheel RV that almost maxes out the payload limit on my truck. I had them installed as instructed, which included installing the spacers, by a local garage. The ride home was an eye opener. The ride was very stiff and it felt like every bump in the road was magnified. Fortunately a few of the videos I watched suggested the install minus the spacers. I returned to the garage and had the SES reinstalled without the spacers. The ride home again was much smoother. I can't wait to hitch up my 5th wheel and go camping knowing I have the Timbren SES installed to help cushion the suspension of my truck.
My Timbrens work great. No adding or subtracting air for towing. No worries about air lines leaking or coming loose. Just hook up the 5th wheel and go. No muss, no fuss, no sag.
Very happy with the purchase process, best price, quick delivery.
Installation was simple except the instructions seem to be in error or conflict. One of the brackets is marked "left" for drivers side. The bottom of the bracket has a straight side and a rounded side. The directions and an installation video on this site say the straight side should be on the frame side. In this position the spring only has partial bearing on the existing plate on top of the axle. The bracket marked "left" has the rounded side on the frame side and this mounting position works the best to get full bearing of the spring on the existing plate on top of the axle.
I am very happy with me Timbren Suspension System, I have no sway when my Truck Camper is on the vehicle. The ride is comfortable and would recommend this product. I will say the ride when the truck is empty is not quite as smooth but the truck is an HD. I just air the tires down when I’m empty and it smooths the ride out.
These have proven to the perfect solution for our '17 Ram 2500 flatbed. I installed them to support a lightweight (1k lbs) camper that became unsafe in strong crosswinds. The Timbrens have 100% solved the delayed sway problem, without affecting loaded ride quality. They have made the empty truck more harsh over around-town bumps. Just something to live with, not a big problems.
Just bought a new Palomino slide in camper and prior to installing the Timbrens my truck had way to much play! Now that I installed the Timbrens my truck is rock solid. No more white knuckles and my truck rides great and that’s even when I don’t have the camper in my truck. Great product!!!
Fast delivery and exactly what I ordered. I had originally ordered these from another website, and after waiting two weeks for them to ship I cancelled the order and got them from etrailer in five days. Haven’t got them installed yet but etrailer is great.
I was sceptical about the claimed ease of installation, but they really are easy. We simply jacked the truck up and swapped out the bump stops with the TDRTT3500E's without getting under the truck or removing the wheels. There is adequate space in the wheel well to everything. Dodge Ram 2500, 2020.
The Timbrens solved the sway problem, but as warned, by making the ride rough even with a 1500 lb. camper in the bed. Overall, very pleased to be rid of the sway.
Absolutely fantastic! So easy to install. These have completely change the ride quality while hauling our truck camper. The truck now rides better loaded than unloaded. The gap under the SES is small, less than an inch. So unloaded ride is a bit ruff since it bottoms out super easy on the smallest bump.
But if I wanted to I could take them off since they go on so easy.
I still wouldn’t pass up having these. I can’t say enough how great they are. And I ordered a used set which were in new condition. Less money, same awesome outcome. Can’t go wrong!
Just changed from Timbren TDR2500D to the TDRTT3500E after getting a new slide-in truck camper. Old camper weighted about 2200lbs new one is about 2900lbs. The 3500E series Timbren reduced squat by about another 1" which was nice, but seems to be a much harsher ride with camper loaded and definitely much harsher unloaded (which was expected since there is no gap with the 3500E). My plan is to go with the 3500E on the next trip and change out to the previous 2500D along the way if the ride is consistently harsh. Luckily changing takes only a few minutes per side. (photo of the 3500E)
I have a 2300 pound truck camper. I drove before the Timbrens and after. Felt like a completely different truck after. Felt as good as my old truck with airbags for half the price.
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Lazer S.
1/20/2026
Sorry to hear that, William. I have heard similar things from people that have installed these severe duty Timbrens though. What are you towing/carrying and how often? And did you already call or email in to get the return started?