bing tracking image
  1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Our Price: $252.45
You Save: $191.25
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Shipping Weight: 4 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
3,000-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 Rear Suspension Enhancement System part number TFRFLX can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (5572)
  • Q & A (0)
  • Photos

Timbren Vehicle Suspension - TFRFLX

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Standard Duty
  • Timbren

3,000-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 get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces rear sag
  • Works independently - side to side
    • Helps to compensate for off-center loads
    • Reduces body roll when you have to swerve or execute a sharp turn
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required


  • Capacity: 3,000 lbs
    • Do not exceed your vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guaranteed

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.

FRFLX Timbren Rear Suspension Enhancement System

Installation Details TFRFLX Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Rear Suspension Enhancement System - TFRFLX

Average Customer Rating:  4.7 out of 5 stars   (5572 Customer Reviews)

3,000-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.

2019 Ford Flex

Had to have it professionly installed.bolts were torqued to the max and access to the bolts was impossible to get clear line for wrenches, when completed ride is better and vehicle sits higher. service and delivery was great

John P.




Does a great job when towing a travel trailer. Really helps with windy conditions keeping the vehicle from dipping in rear with sway of trailer. Vehicle is much more stabile after the install.

2016 Ford Explorer

Supports my power wheelchair and rack with no problems. Handling is the same with or without a rear load. Very easy to install, [online] video was great


The product works great on my Ford Flex



Working great, it’s a nice and tough product

2018 Ford Explorer

Item is just as described, thank you etrailer for the how to video install for my Ford Explorer. Install took 1hr.


These were very easy to install, about 15 mins each. I have not been able to test them with a loaded trailer but they look like they will certainly help with back end sag.





Etrailer Expert

Mike L.


@Steve Thanks, we're glad you're happy with your # TFRFLX Timbren helper springs!

2017 Ford Flex

Fits perfect on our Ford Flex's. Half the price compared to the shop.

2012 Ford Flex

pretty ez delivery


The job took about 1 hour all went wel l.

2016 Ford Explorer


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.


Despite reading about the popularity in using Timbren’s for suspension modifications to assist in ride quality when loading up the Odyssey, I haven’t found many reviews about the Timbren’s for 4th gen Odyssey though there are a ton of positive reviews for the 5th gen Odyssey on the forums and internet.

I went with Timbren’s due to the “set it and forget it” lack of maintenance. I do notice a more stable ride even unloaded at highway speeds. There’s less sway in on/off-ramps and big sweepers. Not a huge change, but warmly noticeable. About the same quality of change one might experience from buying a brand new set of tires vs. not dangerously worn down tread. Where it really shines is under load/heavy cargo.

Before Pic (unloaded mulch); After Pic (loaded) - definitely not as much squat as with the prior OEM bump stops! Comfortable ride with less jostling/sway and haven’t bottomed out the springs over rough road. I’m impressed! Install was fairly easy, about 45 min per side taking my time, cleaning removed parts. One year later, I haven’t had any issues, and I feel very comfortable loading the minivan with all our gear/stuff.

I do not tow.


These keep my truck level with my slide in camper on board. It no longer rests on the helper springs. I have gained over 2” of height on the bed. Super easy to install. They also are noticeable on corners. Not nearly as much lean.


ordered over the phone and got a very nice lady that was very helpful. was feeling like crap so took a few days to open box up and found out only half was there no bolts only one top mounting piece and only one rubber spring part. but i got two big rubber washer things


I have a ram 5500 rollback towtruck it works great no more draging or saggin even with heavy loads has the truck level


I was back and forth between Timbren SES and airbags. Everyone in forums were very biased toward air bags and very opinionated on the Timbren SES. Yet I could find one instance in which someone tried the Timbrens, were dissatisfied and then switched to air bags. I called etrailer, Jamie recommended this product to me for my application. Installation on a 20-year-old truck had me nervous, I live in the Midwest and have a lot of salt. Installation was a breeze, and I have a B&W 5th Wheel Hitch (turnover gooseneck ball). This made the install a bit more challenging simply because I had a large bolt through the frame directly above my bump stop nut. If you do this install with the B&W Hitch, get a set of gear wrenches, or borrow a buddies 15mm and 9/16 wrenches. You need the 15mm to remove the factory nut and the 9/16 to install the Timbrens. I sprayed wd40 two nights in a row prior to installation to make sure I had good penetration of oil - I didn't break a bolt or a knuckle. I recommend installing the Timbren spring to the mounting plate, then install the mounting plate with Timbren to the truck. I didn’t need to remove my wheels or my spare, I jacked up the back under the hitch, used jack stands and let the weight of the axle separate the rear end from the truck giving ample room for the installation. After installation, I checked the clearance of the TImbren from the axle and had 1 inch of clearance. I installed my 1200-pound pickup camper and the springs just started touching the axle. I have a 21-foot fiberglass boat and seen about a 1/4-inch drop after I connected it to my truck. These things work and best part is – no maintenance and no danger of shifting weight if an airbag lost pressure or was punctured/damaged. I hunt with this vehicle and drive through thick brush and timber, I feel airbags wouldn’t hold up with the abuse I put my truck through. The Timbren SES system took the squat out of my truck and made the drop from the connection of my heavy boat hardly noticeable. Thank you etrailer, great experience as usual!


It does a good job of dampening the impact of a suspension bottoming out in a fully loaded vehicle. We have owned our 2005 MPV LX sine new and I have 3 children plus a sister-in-law who goes on camping trips with us. Through the years, I noticed that when fully loaded, the van started hitting the bump stops more often and this is felt as a violent thump when going over bumps or dips in the road. This was getting me worried that the springs and shocks were worn out so I had my mechanic replace both of these because on numerous camping trips, this never happened before. It only partially solved the problem. Then it dawned on me- my kids are now all grown up/heavier. I just wasted $2K on new springs/shocks. I tried rubber coil spring spacers and upgraded my Bump stops to sturdier polyurethane units to replace the foam rubber original ones but these did not help at all. I considered the Air spring inserts but was worried about their complexity, durability and difficulty of installation since I wanted a DIY solution. The Timbrens did a good job of softening the impacts such that my rear passengers immediately noticed the improvement. The suspension still bottoms out but the impact is now soft and it does not affect the normal driving dynamics of the vehicle when not fully loaded. Installation was so easy that I made my two teenage sons do each side to teach them a few life skills. I give the product a thumbs up. The only downside is they are very expensive for what they are made of- simple rubber, bolts and washers. To compare, I could buy two new tires for the price of this pair of SES Buffers. Save your money and try these before replacing the rear springs/Shock absorbers.


Works perfectly as expected. Took the extra bounce out of the rear-end when towing out 5th wheel.
It also keeps the tow vehicle level when fully loaded with 5er and all our gear.

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Timbren Rear Suspension Enhancement System for a 2017 Ford Explorer Sport
    Yes, the Timbren Rear Suspension Enhancement System item # TFRFLX you referenced fits all models of the 2017 Ford Explorer including your Sport model. I have linked an installation video. These hollow rubber springs have a 3,000 lbs capacity and sit above the rear axle to help stabilize and level your Ford Explorer. I have attached an installation video.
    view full answer...
  • Can Timbren Jounce Springs Be Used With a Weight Distribution Hitch On a 2014 Ford Explorer?
    The Timbren Rear Suspension Enhancement System # TFRFLX can be used with the weight distribution while you are towing with your 2014 Ford Explorer. I always recommend to start with the weight distribution as it helps to reduce sag and like your R3 will reduce trailer sway. Adding the Timbren springs will help improve stability and reduce body roll.
    view full answer...
  • Timbren Suspension Kit that Fits 2015 Ford Explorer Police Interceptor
    Yes, since the 2015 Ford Explorer Police Interceptor is the same height as the standard Explorers the Timbren kit part # TFRFLX that you referenced would fit and work well.
    view full answer...
  • Recommended Suspension to Help Sagging on a 2012 Ford Flex
    I have a solution for you that will keep your rear end from sagging when you're towing with your Ford Flex but there are no air bag systems that will work with struts available. Instead you will want the Timbren Rear Suspension Enhancement System item # TFRFLX. These are confirmed to fit both the 2WD and 4WD models of the 2012 Ford Flex with coil springs or struts. The system provides additional support while becoming more rigid as weight is added to your vehicle. It works exceptionally...
    view full answer...
  • How to Keep the Rear End of a 2017 Ford Explorer from Sagging When Towing a Trailer
    I didn't see any vehicle information but if you are still using a 2017 Ford Explorer you could add some suspension enhancement to the rear end. I recommend the Timbren Rear Suspension Enhancement System item # TFRFLX. These hollow rubber springs keep your rear end from squatting when you're towing a trailer. They have a 3,000 lbs load leveling capacity that progressively engages the springs the more weight you add to the rear of your SUV. I have linked an installation video below so you...
    view full answer...
  • Installation of Timbren Jounce Springs and Suspension Enhancement Recommendation for 2012 Ford Flex
    The Timbren Rear Suspension Enhancement System # TFRFLX that you referenced will install to the inside of the coil spring on your 2012 Ford Flex. The installation instructions for the springs are attached. Timbren states in the instructions that a professional installation is required for these jounce springs. The suspension enhancement system I recommend for your 2012 Ford Flex is the Air Lift AirLift 1000 # AL60821. These airbags do install inside the coil springs of your Flex. With...
    view full answer...
  • Solution for Suspension Enhancement That Fits 2014 Ford Explorer Sport
    Although the the Timbren # TFRFLX is confirmed to fit the 2014 Ford Explorer, it does not fit the Sport models. For suspension enhancement that will fit your 2014 Ford Explorer Sport I recommend the Air Lift 1000 Air Helper Springs for Coil Springs - Rear # AL60821. The Air Lift 1000 will support your existing rear coil springs to help keep you level when towing or hauling a heavy load. They install inside of your rear coil spring suspension and have a durable polyurethane construction....
    view full answer...
  • How To Help Keep A 2017 Ford Explorer From Sagging and Wheels Rubbing While Loaded
    The Air Lift AirLift 1000 Air Helper Springs part # AL60821 are a fit for a 2017 Ford Explorer and will help with your rubbing issue. The air bags install inside the coil springs and when inflated will stop the springs from compressing as much therefore you won't sag as much therefore your tires won't rub. The best part of all is that the air bags are adjustable so you can simply let the air out while a load is not present so it doesn't affect the unloaded ride quality. The Air Lift AirLift...
    view full answer...
  • Rear Axle Suspension Enhancement for 2018 Ford Explorer Sport
    The Timbren rear axle jounce spring kit # TFRFLX will not fit the 2018 Ford Explorer Sport but it is possible to use an AirLift air spring kit, part # AL60821, if you have need for additional rear axle support. This kit fits both 2WD and 4WD versions of your 2018 Ford Explorer Sport. AirLift kit # AL60821 provides up to 1000-lbs of load leveling and it will help reduce strain on your OEM suspension and reduce sway. The air springs install inside your rear coil springs as shown in the instructions...
    view full answer...
  • Comparing TImbren Jounce-Style and Coil SumoSprings for a 2012 Ford Flex
    I personally prefer the Timbren Kit # TFRFLX over the Coil SumoSprings # CSS-1069R for your 2012 Ford Flex basically because the Coil SumoSprings are kind of pressed into place and then secured with zip ties to help keep them where they need to be while the Timbrens are secured in place by a bolt. Both will do a great job at adding support to your suspension but in this comparison I'd go with the Timbren kit. Pro Tip - Make sure that your weight distribution (WD) system is rated properly...
    view full answer...
  • Rear Helper Springs for a 2017 Ford Explorer 4x4
    For your 2017 Ford Explorer 4x4 I recommend the Timbren helper springs # TFRFLX. With this system once it is installed there is no maintenance you have to perform and the ride quality will be improved when loaded or unloaded. If you want to go with air bags and have rear coil springs I recommend the Air Lift system, # AL60821.
    view full answer...
  • Air Bags or Timbrens Recommendation for 2017 Ford Explorer
    For your 2017 Ford Explorer the choice of suspension enhancement comes down to a few things and what you value the most. The Timbren kit part # TFRFLX provides a super easy install, no maintenance, and great suspension support. The downside though is that unloaded ride quality will suffer since the spring is pretty harsh. If you will be in need of suspension enhancement basically all the time and like the no-maintenance aspect this is the winner. But if you need to have a decent ride quality...
    view full answer...
  • Will Timbren Springs Eliminate Rear Sag on 2013 Ford Explorer when Towing a Trailer
    Timbren springs # TFRFLX will still allow the tongue weight of the trailer to pull down the back of your 2013 Ford Explorer a little, about an inch or so, so it won't take out the squat completely. The best solution for squat caused by towing a trailer is weight distribution (provided that your trailer hitch is rated for it). On boat trailers there is usually a straight tongue called a pole tongue. To use weight distribution you will need a pole tongue adapter # EQ95-01-5950. Then you...
    view full answer...
  • Will Timbren Rear Suspension Enhancement System Fit a Lifted 2017 Ford Explorer
    In order to install the Timbren Rear Suspension Enhancement System part # TFRFLX on a lifted 2017 Ford Explorer you'll indeed need spacers to fill the gap. The best option is to match the height of the spacer to the actual lift. We offer both 1" part # A25723-90AH00 and 1/2" part # TA25722-90P00. Please note, because of the spacer's you may need to source longer hardware to attach the spring to the bracket.
    view full answer...

Do you have a question about this Vehicle Suspension?

Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Chris R
Video by:
Chris R
Employee Jonathan Y
Video by:
Jonathan Y
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Carrie F
Updated by:
Carrie F
Employee Bethann B
Updated by:
Bethann B
Employee Brent H
Test Fit:
Brent H
Employee Robert C
Installed by:
Robert C

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.