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  1. Vehicle Suspension
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  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Extra Heavy Duty
Timbren Suspension Enhancement System - Rear Axle

Timbren Suspension Enhancement System - Rear Axle

Our Price: $465.47
You Save: $82.14
Vehicle Suspension

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12,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number TFRSDE can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • Timbren

12,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


  • Improves suspension, handling, and safety
  • Provides additional support as needed so you always have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
    • Becomes more rigid as more weight is added for a great performance when you're hauling a heavy load
      • Increases stability
      • Reduces vehicle sag
  • Works independently - side-to-side adjustment
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as a shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets, and hardware for simple installation
    • Installs directly onto frame
    • No drilling required


  • Load-leveling capacity: 12,000 lbs
    • Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • Lifetime warranty
  • Satisfaction guarantee

An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.

Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.

Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your vehicle level.

Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's side or passenger's side of your vehicle. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you are hauling off-center loads.

An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.

An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.

Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. And more elasticity allows for a more comfortable ride because the rubber has more travel.

FRSDE Timbren SES with Aeon Hollow Rubber Springs - Rear Axle


Installation Details TFRSDE Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Suspension Enhancement System - Rear Axle - TFRSDE

Average Customer Rating:  4.7 out of 5 stars   (5744 Customer Reviews)

12,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

Ford F-550 Cab and Chassis

These are amazing! Simple to install, easy to read instructions, very straightforward. Hardest part was taking off the factory bump stops, but I was lying on my back using hand tools.

I put these on my F550 wrecker and they alleviated the squat I was experiencing when towing trucks.

In the photo you can compare the factory bump stop with the Timbren.

In my truck I did not use the extra spacer that is included in the kit. If I had jacked my truck up higher I could have used it. As it is right now the Timbren's are always in contact with my axle. In my opinion my unloaded ride is better as well.

I HIGHLY recommend these for tow trucks.

2019 Ford F-550 Cab and Chassis

We purchase the Timbren Suspenstion Ehahancement System for our 2021 Ford 550 plumbing truck. The F 550 plumbing truck has a full height 6'x 12' custom made enclosed steel service body. At the time of the purchase our salesman explain that Ford makes 2 versions of a F550 cab and chassis. one F550 light duty 17,500- heavy duty 19,500. We purchased the F550 light duty thinking we did not need that much carry capacity and lowering the overall purchase price.
Once the truck body was custom made and we drove it around for a few months we notice that the light duty suspension was a little soft due to the max weight we sometimes are hauling.
This is when we look into purchasing the Timbren Suspension Enhancement System. Once we installed this system we right away notice a big difference in the stability and handling of the F550 truck and are very impressed due to the cost and simplicity to install the product. Now after 1 year with the Timren Suspension we are very extremely happy that it is performing as well as the day they were installed. We have had no issues and would purchase this product again without any hesitation.

Thank you for a very well made suspension product that meet are need.

D-Extreme plumbing
Duane J.

Ford F-450 Super Duty

These work great on my F450 with towing my 21k lb 5th wheel. Also help the ride when unloaded. A cheaper alternative to airbags, and it took me about a hour and a half to install both sides. Very happy with this product



I like the Timbrens more. I am in the middle of a cross country adventure 4500 miles so far and the Timbrens are preforming great. And I am not a interstate rider, we take the rig back country, up and down 8 grades, twisty roads and bumby roads. Could not be happier.


perfect parts and fit! quick shipping as well!!


Fast shipping

2015 Ford F-450 Super Duty

Can't wait to try them out thx

2019 Ford F-550 Cab and Chassis

A great product and great service again.

2015 Ford F-550 Cab and Chassis

Showed on time and easy installation. This is why I continue to be a loyal customer.

Ford F-450 Super Duty

Springs hold up good really helped out with the problem. My F450 squats less than before.


Both people that I spoke with were extremely willing to help. Item ordered actually arrived quickly.

2020 Ford F-550 Cab and Chassis

Easy install, can’t wait to road test with a load





2020 Ford F-450 Cab and Chassis


About a 1/2 inch difference in gap at the bump stop perch but still within parameters. Truck sits perfect with trailer attached. Haven’t towed yet. After towing if they perform like they should will upgrade to a 5 star. Easy to install, definitely needed 2x4 and jack. 2011 Silverado ext cab with 30 ft Genisis 5th wheel.


Haven’t had it on long, but so far so good. 1999 F350 dually. Bolted up nicely. Total job took 10 minutes. Have hauled two gooseneck loads of hay and truck drives SO much better. Nice and level. Money well spent so far.


I know it will be lovely when loaded or the trailer on. However,it rides like a wagon empty with brand new premium shocks and struts empty. Thud thud thud. You really cannot feel the shocks or suspension. Found exact same item plentiful for 60 bucks on eBay after I bought these for 250. I may cut these in half or put air bag on. I do not like the ride empty. No hard feelings. It is a good product maybe just not for me.


The timbrens actually did what they were suppose to do. However, once I starter driving out west I notice the timbrens were riding on the axle which cause the speedometer to jump around depending on the road. I would recommend them if you are hauling or towing a camper or RV. I was going to contact etrailer about maybe removing a spacer for one set however the other set came as one unit. The bottom line is the Timbrens does stabilize your load for safe travels. I will be contacting etrailer soon to assist in correcting the problem...Road trip from Idaho,Colorado,Wyoming,and Utah were beautiful... Thank you etrailer


I’d seen similar products rated in the 4,000 lb ratings but I went with these. I’m not a mechanic but I removed the factory bump stops and installed both these in 30 minutes or less. I used my rolling jack and lifted from the drop hitch and easily removed the old ones and soapy water and 1/4 twist and these were on. Placed a block of wood in the space between these coils and lowered the jacks then pressed it with my tractor to confirm full engagement. I carry a lot of tools on a 2020 Chevy 2500 I do feel a bit of butt bounce on large bumps but other than that I’m very pleased.


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!


The Timbren rear bump stops for 2020 Suburban were great quality and fit perfectly in the replacement of the original ones with no problems. The old ones pulled right out by hand with no hassle. When I installed the new ones I put 2x4 blocks that I cut underneath the bump stops. Then hooked up the 6,400 lbs travel trailer with about 750 lbs of tongue weight on it and they pressed right into place. The Suburban was more stable because it had less swaying while towing. I also gained about 1 inche more in the fender gap which means less rearend saging.


This was my second experience with Timbren. This was for my 2010 Dodge Dakota. Great platform without a lot of aftermarket support. Timbren had a set of these designed just for my truck. I installed and it solved the sagging rear end of the truck and swaying when cornering when carrying my pop up slide in camper. This is a n easy install and completely worth the investment.


I don't usually write reviews but in this case I have to. I have been using these springs for about a year now and they work exactly as advertised. I carry a truck camper on my truck from March until November. Once I loaded my camper the truck sagged very noticeably. I tried the Roadmaster Active Suspension (don't waste your money) before I discovered the Timbren springs. The Timben springs installed easily, eliminated the sag and gave the truck a much more stable ride because it eliminated the side to side rocking in the back. If you are thinking about getting these, you will not be disappointed.

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Recommended Suspension Enhancement System for 2017 Ford F-450 with 5th Wheel Hitch
    For your 2017 Ford F-450, the Air Lift options as you pointed out are not compatible with a 5th wheel or gooseneck hitch. The manufacturer states that none of their current options for your vehicle will work with the 5th wheel hitch installed although they can work with other vehicle models. My recommendation is to instead go with the Timbren Suspension Enhancement System - Rear Axle # TFRSDE. These aeon rubber springs absorb shock and increase in support as the load increases to give...
    view full answer...
  • Suspension Enhancement System For A 2016 Ford F-450 Cab And Chassis
    The Timbren Suspension Enhancement System # TFRSDE is confirmed to fit your 2016 Ford F-450 Cab and Chassis. Using the Timbren system will improve the suspension, handling, and safety of your vehicle. The springs work independently with side-to-side adjustment. The system acts as a shock absorber, taking the brunt of bumps and rough roads and will extend the life of your vehicle's suspension. They will directly install to your trucks frame with no drilling required. The system has a...
    view full answer...
  • Installation of Timbren Springs On A 2016 F-450 With DANA S130 Square Tube Axle
    The Timbren Rear Suspension Enhancement System # TFRSDE is a confirmed fit for your 2016 Ford F-450. The only thing the instructions state is to make sure that the Aeon Spring does not come in contact with the brake line. The springs are designed for and confirmed to fit your vehicle with the brake lines routed in this area with your Dana axle. None of the installations have required moving brake lines but the brake lines do come close. I reached out to my contact at Timbren and they...
    view full answer...
  • Suspension Enhancement for 2020 Entegra Odyssey 26D
    We have a Timbren solution for the front and rear suspension of your 2020 Entegra Odyssey 26D but we do not have a SumoSpring kit that fits at this time. The Timbrens are a very similar design and would work well to improve suspension support and stability. So for that you'd want the part # TFRSDE for the rear and # TFF550SDH for the front.
    view full answer...
  • 2022 Thor Omni RS36 Motorhome Jounce-Style Suspension Enhancement Recommendation
    We do have a specific product like the SumoSprings that fits your 2022 Thor Omni RS36 on the Ford F-600 chassis; the Timbren Suspension Enhancement System for Front # TFF550SDE and Rear # TFRSDE. This installs similarly to the SumoSprings and is simply a different brand - it doesn't look like SuperSprings has a fit for this chassis as of yet (April 2022). This kit replaces your factory bump stops so you'll get better support for your motorhome.
    view full answer...
  • Recommended Suspension Upgrades for a 2022 Thor Omni Motorhome
    The Timbren item # TFRSDE you were looking at are confirmed to fit the 2022 Thor Omni motorhome that is built on a 2021 Ford F600 4WD chassis. These have a 12,000 lbs capacity that will provide more load support and stability when you are driving your motorhome. They act as a shock absorber by taking the brunt of bumps and rough roads. There will be no issues using Timbrens in the rear of your motor home and SumoSprings for the front end. For your Thor Omni's front end you will want...
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  • Recommended SumoSprings and Sway Bars For a 2019 Nexus Viper 29V On 2019 Ford E-450 Cutaway Chassis
    I recommend the SumoSprings Maxim Custom Helper Springs # SSR-106-47-1 for the rear of your 2019 Nexus Viper 29V on the Ford E-450 Cutaway chassis. You will need to ensure that you have the required 7" between the frame rails and the inside tire for these to fit properly. These springs have a 5,000lb capacity with the microcellular urethane that has a progressive spring rate to help absorb bumps as well as reduce body roll in turns. Do note that these will not increase your capacity and...
    view full answer...

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