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

Item # TFRF53A
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Vehicle Suspension TFRF53A - Jounce-Style Springs - Timbren
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8,600-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. Lowest Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TFRF53A can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Timbren Vehicle Suspension - TFRF53A

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

8,600-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
      • Does not affect the empty ride of the vehicle
    • Becomes more rigid as more weight is added
      • Increases stability - providing great performance while hauling heavy loads
      • Reduces vehicle sag
  • Works independently - side-to-side
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as shock absorbers, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension


  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 8,600 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee

An example of sag on a truck's rear axle under a heavy load. The Timbren Suspension Enhancement System levels the vehicle.

Whether you're hauling heavy loads in the cargo area or by pulling a trailer, you will often see the rear sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but more of the truck's weight, as well. 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 has a custom-fit bracket that will be 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, one inch 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 the truck level.

Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's 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 the truck. 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.

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.

FRF53A - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TFRF53A Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Timbren Rear Suspension Enhancement System - TFRF53A

Average Customer Rating:  4.7 out of 5 stars   (2370 Customer Reviews)

8,600-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.

2018 Ford F-53

Delivery by etrailer was fast. Their advice as to proper application of the Timbrens saved me lots of money! 749745


It was very easy to order this item from Etrailer. The item was delivered earlier than expected in strong packaging. Now for the Springs. I chose these because of the no drill install and reading a lot of reviews. I placed the springs on the rear axle of my 2018 Georgetown GT5 on the Ford F53 20,500lb chassis. It took around 20 min on my back but was easier than expected and I am 74. I have driven 1200 miles on the springs and I am more than happy with them, worth every penny. Side wind and passing trucks was almost eliminated, almost. 643899

Still going strong.I still feel that they were a great choice.
Joe T - 05/20/2020



Best investment for suspension so far!! Had wind, semi’s and large dips in road sway our 2015 Bounder all over the road. With the timbrens installed took care of almost all of that! Big dips, Bounce one time, done. Semi’s pass no issue, Wyoming winds cuts right through! 869071

2016 Fleetwood Southwind Motorhome

Ordered Timbren from etrailer.com on Monday and received them today (4 days). I installed them on the rear of my 2016 Fleetwood Southwind Class A motorhome. Install took an hour with a short break between sides. I’m 67 years old and it was a hot day. So I thought the install went really well. A couple of tips: Use a cordless impact wrench with deep well socket. Also I used wood shims to hold Timbrens in place while securing the bolts through the frame. A quick test drive revealed a smooth ride on the straight away. What was immediately apparent was during turns the was a noticeable decrease in body sway. I have 2 piece Sumo springs on the front. I feel like this is going to be a great combination and looking forward to hit the road! 844658


Help with not hitting so hard 820994


Reviewed with the vent covers I purchased. I would highly recommend adding these or other suspension products especially for Class A. I chose the Timbren because I could install them without taking the tires off and without drilling any additional holes in the chassis. 804123


The vent covers and Timbren products were shipped quickly and everything I needed was included. They were very easy to install, 3 covers done in 20 minutes. Timbren suspension products I chose because of ease of installation, no additional drilling, no taking the tires off. These did take some time but we’ll worth the effort, handling greatly improved. Also added Safe-T-Plus steering. 804120


Product is as represented. Thank you. 799184

2005 Ford F-53

Installed Timbren on my 2007 coachman Mirada , Ford F 53 chassis (2005) with a panhard bar , tight fit with the bar brackets. I spaced the Timbren away from the frame with large flat washers which gave a more comfortable clearance to brackets. Some brake line and vent hose adjustments and a hole to drill for a Factory electrical part mount . I gained 1 1/4 “ trailer hitch height , very satisfied. 796840


The front and rear kits came yesterday and I installed them today in my pole barn while the winter weather blew out side. Will try them next month! I am 75 years old and did the install myself , the rear took the longest as it is a tight area. My unit is a 2017 Georgetown XL Thanks for the videos and info online. 756628


Just installed the Timbren suspension stabilizers on the rear of my Newmar Canyon Star 3911 motor-home. The installation was easy and simple. As the video showed, just remove the old bump stops and install the Timbren's. They are significantly larger than the stock bump stops. After having installed the Sumo Springs on the front and the Timbrens on the rear, the ride is so much better. No more swaying back and forth when a big truck passes or a crosswind. I highly recommend this combination since there is no drilling into the frame of the motor home and you do not have to remove the tires either. 695925


The help I received from E trailer was great. They fit perfect! Highly recommend 680204

2018 Thor Windsport Motorhome

Great service, will install this afternoon. assemble in my garage should have them on the afternoon, trip tomorrow will report the change to the ride next week. 605206


Review from a similar Aeon Spring System in Vehicle Suspension

this is the second set of Timbren springs I have purchased, the first set was on my Ford Raptor, they took all of the sag and sway out of pulling my boat. I have this set on my 2015 GMC Denali 2500HD, I pull a 42 ft. 5th wheel and the Timbren's take all of the sag and sway out, these are in my opinion the best product I have purchased for my truck. 683687

this is still an amazing product! works as good today as the day I installed it. I recommend this to all my friends.
John G - 08/12/2020


- TDVR05096

Review from a similar Aeon Spring System in Vehicle Suspension

I carry 1400 pounds of tools and supplies in my NV200. These helped carry the load, along with heavier shocks. Very happy! 691745


Review from a similar Aeon Spring System in Vehicle Suspension

5 stars. Easy to install and made a big difference when pulling a 9k pound travel trailer. I would recommend it to anyone pulling a trailer. Kept it from sagging and level. 699184

Awesome and still working
02 F - 09/09/2020



Review from a similar Aeon Spring System in Vehicle Suspension

Installed this on my 2009 Caravan because when I had a hitch mount 4-bike platform rack hanging off the back and was loaded with camping gear and family, the rear suspension was terrible, it would bottom out, and my headlights pointed up so that everyone would flash their brights at me. New shocks helped, but did not solve the problem. This product did fix the problem and I am very happy. I was concerned about the feel when the van us unloaded, but this has not been an issue. I highly recommend this product. 796869


Review from a similar Aeon Spring System in Vehicle Suspension

I first put the Timbrens on the rear to help stop bouncing and porpoising on highways and bridge ends when towing. The rears have a gap and do not touch the springs until the truck is loaded, working great and keeping a smooth unloaded ride. The front Timbrens fit snugly and touch all the time. The ride is firm and a bit harsh with my unloaded truck having a snow plow spring option. When my trailer 30 ft trailer is hooked up, the front of the truck is slightly lighter. Towing with the Timbrens is nice and the bounce and rebound porpoising is very controlled. I would like the front Timbrens to be a little softer when the truck is unloaded, but I think these units are a nice add-on for better control, safety, and preventing damages. I had the fronts installed at the shop when rotating tires and a front end alignment. The rears installed easily. 691475

They have worked out great when towing my 30 ft trailer. We took a coast-to-coast trip across the northern USA and into Canadian Rockies and excessive bouncing was controlled. I still would like the front to be a bit shorter and not always touching, so the unloaded ride would be less harsh.
Greg B - 08/20/2020



Review from a similar Aeon Spring System in Vehicle Suspension

So far they look great. I will put on this weekend and see how they work with my travel trailer. 476068

- TDR1500DS

Review from a similar Aeon Spring System in Vehicle Suspension

Doesn't get any easier for an install. A jack, some soapy water and a couple pieces of 2x4. In about 5 minutes you're done. Took out almost all sag when I dropped my travel trailer on the ball. Great addition to the suspension. 488109

- TDR1500DS

Review from a similar Aeon Spring System in Vehicle Suspension

Not sure these were the best thing for my Ram 1500 pulling a 5th wheel. On some roads get a lot of bucking. Just ordered a set of Air Ride 5000's to try next. Larry T 617920


Review from a similar Aeon Spring System in Vehicle Suspension

These arrived as scheduled. The look good, well made. On my way out to install them now. The will get tested later today on the way to the lake. 703241

- TDR1500DS

Review from a similar Aeon Spring System in Vehicle Suspension

Very happy with my timbrens and quick shipping. Added these to a 2013 2500HD 4X4. Quick and simple to install. improved ride quality and takes the squat out when pulling a gooseneck trailer. Very happy and would recommend to anyone wanting to improve quality of ride height. 493335

- TDR1500DQ

Review from a similar Aeon Spring System in Vehicle Suspension

This was ordered because the truck seemed overloaded with just s few items. I haven't installed it yet but will let you know how it works after I do The shipping and packing were excellent and arrived quickly. 420483

Working great.
Glenn L - 08/15/2018


- TDR1500DS

Review from a similar Aeon Spring System in Vehicle Suspension

Great product. 597716

Show More Reviews

Ask the Experts about this Timbren Vehicle Suspension

  • Comparing Timbren and SumoSprings Suspension Enhancement for 2019 Thor ACE 30.2 Motorhome
    The biggest difference between the two for your 2019 Thor ACE 30.2 motorhome, and the reason why I highly recommend the SumoSprings over the Timbren, is what each product is constructed from. The Timbrens are made from a strong, rigid rubber while the SumoSprings are made from microcellular urethane. This is important because it means the SumoSprings will compress more gently, while the Timbrens are known to give a much stiffer ride. The front axle and rear axle fits for your 2019 Thor...
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  • Comparing Timbren and SumoSprings for a 2018 Ace 30.2 Motorhome
    Yes, the front # TFFF53B Timbren suspension enhancement are similar to the front # SSF-170-40-2 SumoSprings for your 2018 Thor ACE 30.2 Motorhome. Timbren is a little more well-known but we have received feedback from our customers that the SumoSprings offer better ride quality as they aren't as stiff. If you are comparing the rear Timbren # TFRF53A with the rear SuperSprings # SSA41 for the leaf springs then they are comparable when it comes to performance but they work slightly...
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  • Rear Suspension Enhancement Recommendation for 2018 Thor ACE 30.3 Motorhome
    For sway reduction the SuperSprings # SSA41 are the best option for your 2018 Thor ACE 30.3. This upgrade is known to have the best anti-sway characteristics of all of the suspension enhancement kits out there.
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  • Does the Timbren FRF53A Fit on a 2019 Holiday Rambler 33C Vacationer on Ford F-53 Chassis
    I was able to confirm with Timbren that the Timbren Rear Suspension Enhancement System # TFRF53A is a confirmed fit on the rear axle of your 2019 Holiday Rambler 33c Vacationer on the Ford F-53 chassis. I've linked the installation we did on a similar F-53 chassis coach that you may want to refer if you're going to be installing these jounce bumpers yourself.
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  • Dimensional Drawing of the Timbren Rear Suspension System # TFRF53A
    I spoke to my contact at Timbren and she emailed me a picture of a Timbren # TFRF53A with handwritten dimensions drawn on the picture. See attached picture. I attached installation instructions for this product for you to check out.
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  • Recommended Suspension Enhancement for Smoother Ride on 2018 Thor ACE 30.3 Motorhome
    For your Thor ACE 30.3 Motor coach, I recommend the Timbren Rear Suspension # TFRF53A and front suspension # TFFF53B. This will help with the stability of your coach and act as a shock absorber as well. They help reduce body roll and compensates for off center loads as each spring works independently. At this time, these are the only confirmed fit parts for your 2018 Thor ACE 30.3 motorhome on Ford F53 Chassis.
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  • Suspension Enhancement to Reduce Sag and Roll on a 2000 Hurricane Motorhome Ford F53 Chassis
    First, if your RV is sagging because the suspension is worn, you will need to have the suspension fixed before adding springs. Suspension enhancement systems are designed to be installed on a vehicle with suspension that is in good working order. Once you are sure your suspension is in good working order I recommend using a system with a higher capacity. For a higher capacity system, 16K to 22K, use # SSR-181-54-1. This system will reduce sag and help reduce side to side roll. Using...
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  • Can Timbren Rear Suspension Enhancement Fit 2018 Thor Windsport Motorhome with SumoSprings Front
    Timbrens on the rear of your 2018 Thor Windsport Motorhome with the part # TFRF53A would work great with the SumoSprings you already have installed on the front. You should note that the biggest ride quality improvement you'll be able to make for the Ford F-53 chassis is a rear sway bar. Which for that you'd want the part # RM-1139-140 which is a confirmed fit for your motorhome. This is what we recommend everyone start with to improve the ride of the F-53 motorhomes. I attached an install...
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  • Timbren Suspension Kit Recommendation for 2007 Four Winds 32 Foot Motorhome
    Your 2007 Four Winds 32 chassis is a Ford F-53 chassis so for a Timbren kit you'd want the # TFRF53A which is a confirmed fit for the rear and part # TFFF53B for the front.
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  • Combining SafeTPlus with SumoSprings Suspension and Roadmaster AntiSway Bars on a 2020 Thor Ace 27.2
    You can most definitely use SumoSprings front and rear suspension springs along with Roadmaster front and rear anti-sway bars. This isn't overkill, it's just wanting complete control of your motorhome! Here are the part numbers for the springs and bars that are confirmed to fit your chassis: - SumoSprings Front Springs: # SSF-170-40-2 (included video is an installation on a 2020 F-53 chassis) - SumoSprings Rear Springs: # SSR-187-40-1 (included video is an installation on a 2018...
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  • Sumo Springs Versus Timbren Suspension Enhancement For 2019 Jayco Precept 31UL 22,000#
    While both the Timbren Suspension Enhancement System # TFFF53B & # TFRF53A and the SumoSprings Rebel Custom Helper Springs # SSF-170-40-2 & # SSR-180-54-1 are both great solutions for your 2019 Jayco Precept 31UL, there are some differences to take note of. Timbren is a bit more renown in this space and while a very solid product, that strength comes with the tradeoff that the ride quality can be stiff. Made from a rigid rubber construction, it can be less forgiving and this has been...
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  • Timbren Suspension Enhancement Fit for 2018 Newmar Bay Star
    Believe me when I tell you, of all the questions we get, this is definitely NOT a stupid one, and to answer your question, both the Timbren Rear Suspension Enhancement System # TFRF53A and Timbren Front Suspension Enhancement System # TFFF53B will fit on you 2018 Newmar Bay Star which is built on a Ford F-53 chassis. The Timbrens will do a great job of supporting your motorhome's suspension to stabilize it and minimize body roll when taking on tight corners, for example. The Timbrens...
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  • Choosing Between SumoSprings or Timbren for 2013 Fleetwood Storm 32BH
    Although either the # SSR-187-40-1 Sumo Spring or the Timbren # TFRF53A would be a great choice, the Timbren Aeon spring is actually rated higher at 8600 lbs, versus 2600 lbs for the Sumo Springs alternative. Neither of these options will come into play unless the factory suspension gets compressed. If ride quality is the more important consideration, the Sumo Springs option is what I'd recommend as they' give a more supple ride. If reducing roll in the corners is foremost in your mind,...
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  • How to Reduce Jolting Feeling in Steering and Rough Ride on a 1998 Fleetwood Pace Arrow Motorhome
    In order to reduce the jolting feeling in your steering you are going to want to add a steering stabilizer like the Roadmaster Reflex Steering Stabilizer part # RM-RSSA. The Reflex Steering Stabilizer contains a tempered steel spring that will work to return the steering wheel back to its normal state while turning therefore reducing the jolting feeling. The only issue that you are going to have is that they do not make a bracket kit specifically for the V10 model, just the V8 model. However,...
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  • Correct Timbren Suspension Enhancement System for a 2000 Tiffin Allegro Bay Motorhome
    The correct Timbren Suspension Enhancement System for your 2000 Tiffin Allegro Bay Motorhome on a Ford F-53 Chassis is going to be part # TFFF53MH for the front and part # TFRF53A for the rear so long as you have a leaf spring suspension system in the front and not a coil spring suspension system in the front. The Timbrens will do a great job of reducing body roll and absorbing shock. In regards to the steering wheel being off-center, this is an alignment issue that you will need to...
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  • Will The Timbren Rear Suspension Work on the Rear of a 2001 Ford F-53 Class A Motor Home
    Timbren does offer a suspension kit for the rear of your 2001 Ford F-53 Class A Motor Home. It is the Timbren Rear Suspension Enhancement System, part # TFRF53A. It will install in place of the bump stops on the vehicle. They are designed to work with a suspension system that is in good working order. They are not designed to be used as the main suspension system on your vehicle. It works by being installed on the vehicles frame rail one inch above the rear axle. The one inch clearance...
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  • Timbren Suspension Enhancement for a 2002 Jayco Firenza 33A Motor Home on a Ford F-53 Chassis
    There are specific suspension enhancement products made for the 2002 Ford F-53 chassis. I have included a link to them for you. For a Timbren system on the rear axle, if you have an F-53 chassis with front leaf springs, use # TFRF53A. I have included a link to the installation instructions for you. These springs have a capacity of 8,600 pounds. For the front axle, again if the chassis has front leaf springs, you can use # TFFF53B. These springs are rated for 8,000 pounds. I have linked...
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    The Timbren Front axle Suspension Enhancement System part # TWFRW22 is a fit for the 2003 Winnebago Adventurer 38G on the GM Workhorse chassis. I recommend to also add the rear suspension part # TWRW22. The Timbren springs are a great option to level out the motor home and help with body roll when turning corners. If your Winnebago is on a Ford chassis, you need part # TFFF53B for the front and part # TFRF53A for the rear. You may also consider adding a steering stabilizer part...
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Info for this part was:

Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
John H
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
Mary E
Video by:
Jonathan Y
Test Fit:
Robert C
Test Fit:
David F

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