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

Timbren Rear Suspension Enhancement System

Item # TFR250SDG
Our Price: $252.45
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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. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TFR250SDG can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFR250SDG

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Timbren
  • Extra Heavy 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
    • 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
  • Overall height: 6-1/2"
    • Height of bracket sides: 2"
    • Spring length: 4-1/2"
  • 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.

FR250SDG - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Rear Suspension Enhancement System - TFR250SDG

Average Customer Rating:  4.7 out of 5 stars   (4792 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.

Nissan Leaf

The system works well while under load with a gooseneck or bumper pull trailer, however when unladen the ride can be bumpy as there is not a lot of Gap between the leaf springs in the timberland rubber shocks. The system works for us because we usually haul with this truck. If you use your truck as a daily driver with no load an air bag system would give a more comfortable ride.


Great product there leveled the load and made tow way better.


Great the timbrens took the sag and sway out when towing my 5th wheel camper.
Steven - 12/14/2022

2012 Ford F-250 Super Duty

Here are some pics. I installed the timbren could in about 20 minutes and put them to work the very next day pulling my LE3505 Weekend Warrior Fifth wheel. My 2012 F250 power strike was sagging horribly before purchasing these coils. The coils make the truck perform like a one ton & rides wonderful! Thanks for the opportunity to not have to install Air Bags!!

2016 Ford F-250 Super Duty

After one year the Timbren Rear Suspension Enhancement System has performed as
advertised. My 2016 F-250 does NOT squat with the fifth wheel trailer attached and the ride quality with trailer attached has also improved. Springs arrived quickly and took about 30-40 minutes to install. Excellent Product for towing!!!

Product is in the third year of service and has performed flawlessly. Just a warning to everyone CHECK THE BOLTS!!!! I found one of them loose and vibrating while doing a pre-trip check!!
Patrick G - 11/05/2018

2012 Ford F-250 Super Duty

I read the recommendation to another buyer and decided to try this product on my 2012 Ford F250 Superduty. I needed help for my 25' goose neck trailer. EASY to install. Worked perfectly with 15K of hay + 6K of trailer weight. The rear of the truck barely set down on the factory overload springs. Empty ride does not seem to be affected as the Timbren pads do not contact the overload stops.
Thanks for a perfect solution without great cost and installation hassle!

Still going strong even pulling a 38 foot fifth wheel toy hauler.
Tom W - 07/20/2014

Ford F-250 Super Duty

The Timbren Rear Suspension Enhancement System was easy to install and works very well with our 5th Wheel attached. With no load in the bed of the truck (F250 Super Duty) the ride is a bit stiff, but with a load or with the 5th Wheel in tow the ride is very smooth and the Truck no longer dips in the back.


Took the dip out of my truck with 35ft travel trailer. Got smoother ride going down the road with less chucking. GREAT!!

couldt be happier. Timbrens continue to give me smoother ride and keeping trailer level with truck in towing.
Chuck - 08/02/2022


Just installed these so haven't had a chance to put them to use. We have a 5th wheel RV and was told by a mechanic that these will stop the rear end sag and also help with any sway problems.
Also need to really give a big cheer for etrailer, very friendly and fast service! Thanks etrailer!

2019 Nissan Leaf

The Timbren rubber springs are a great addition to the truck 2013 Super Duty Lariat Crew Cab 172" 4x4. The truck has the 20" wheel option which requires the factory to place a 2" leveling block up front. That makes the truck level of course, taking away the rake, however in doing so makes it look like it's squatting when loaded. Before installing the Timbren springs I loaded the truck with a pallet of pellets and the wheel well sat at 38 5/16" from the ground. After the installation the same load was placed in the bed and the wheel well measured 39 9/16" from the ground. The Timbren springs saved over an inch of squatting meaning more weight on the front for steering and breaking. The ride improved from the motion of the ocean leaf spring ride while pulling our travel trailer to a more smooth but firm at the same time feel, a better ride than empty which does not engage the Timbren springs. This product is the fraction of the price of air bags and far less complicated/ less parts and things to go wrong. One of the original bump stops gave me a hard way but wasn't too bad. I installed the Timbren springs 19 March 2016.

Ford F-250 Super Duty

I was undecided what I needed to replace the factory bump stops on my F250. Erica G. was very knowledgeable about my situation and steered me toward the product that I needed. Thanks!


After a year these suspension supports have been put through the ultimate test from pulling a 35 foot bumper pull RV and a fully loaded 28ft car hauler not to mention all of the landscape supplies loaded in the bed of the truck. In all the situations I absolutely had no problems with sag or sway. With no load my truck had the same ride as factory. Very pleased.


I have a 2015 Ford F250 Lariat, I pull a 7000 lb. travel trailer. I was led to believe that My empty ride comfort would not change, NOT TRUE. I have removed them.

This product is basic and will get the job done, however, a set of airbags will give you both increased support and improved ride quality. I recommend trying the Firestone Ride-Rite Red Label Extreme Duty Air Helper Springs part # F2703
Firestone Ride-Rite Red Label Extreme Duty Air Helper Springs - Rear Axle
. If you want to operate the airbags inside the truck you can use the Firestone Air Command I part # F2097
Firestone Air Command I - Analog Gauge w/ Heavy-Duty Compressor - Single Path - 150 psi
. You could also try the Roadmaster Active Suspension system part # RAS3611-SHD
RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
as long as you do not have a factory overload spring. If you do have a factory overload spring then part # RAS3611-SLHD
RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
is the one you will want to use.
-- Etrailer Expert Sierra K - 05/03/2022

2016 Ford F-250 Super Duty

These may be a five rating, just put them on today so time will tell so I rated them a 4 for now, and the install was a bit of a pain as a result of short bolts. After installation, my F250 Super Duty 4x4 (no lift) has about ½” between the frame and the Timbren SES bump stop. Took me about 1.5 hours to install both sides. Taking off the old bump stock while not complicated was a bit of a chore. But a little muscle and time and they came off.

I did encounter an issue which certainly elongated the install time. The two bolts (long ones) that are meant to feed up through the bump stop with a lock washer through the internal bulb washer were “to short”! I tried and tried, I even smashed the lock washer down a bit and retried, no go. The bolts on either side would not thread unless the washer was off, so…I installed them without the lock washer. I’ll have to keep an eye on them I guess? Analysis…the two long bolts supplied are too short by about an 1/8th of an inch to thread into the Timbren SES frame assembly.

2015 Ford F-250 Super Duty

It took 3 hours from start to finish the old stops took the most time to remove once installed we went for a ride with the slide in camper it was amazing I would recommend it to others


Holds the truck level, and a bit smoother ride with the camper or a trailer on. So far they have been great!

2015 Ford F-250 Super Duty

It was easy to install. I haven't
my toyhauler yet. But did read reviews and I'm sure I will love them.

2013 Ford F-250 Super Duty

I ordered the Timbren Suspension Enhancement Kit on Monday and received it on Wednesday with the standard shipping. (Free on orders over $150.00). This is the third order from and every order has been expedited quickly and received before date quoted. All my orders have been correct and good quality. I installed the Aeon Rubber springs on my 2013 F-250 4x4 Diesel in about 20 minutes just like the video showed. With my truck bed loaded with supplies and bumper hitch trailer hooked up, my truck bed is just a hair below level; before it squatted a couple of inches. The road test will be tomorrow.

2012 Ford F-250 Super Duty

I installed these on my 2012 Ford F250 because I have two friends who have them on their trucks and they pull a travel trailer and a fifth wheel camper. I was impressed with the difference it made compared to my truck and camper Parked next to theirs'. I am mechanic and I see no reason why anyone would have trouble installing these them selves. Clean off the Nut and end of bolts before trying to loosen. Spray some WD-40 on the threads. Put on some gloves and use a 15mm wrench to loosen factory nut. Be sure to hold up on the factory bump stop because it has a line up pin that keeps it from turning as you loosen the nut. The driver side is a little more aggravating to get to because of wiring harness but there's plenty of room to use a wrench first then a 3/8" drive rachet and short extension with a good 6point 15mm standard depth socket will speed up removal. Then installing the new parts is a breeze. Just follow directions or etrailer videos on YouTube. Took longer to remove factory bump stomps than to install new ones. Maybe 45 mins total on original ones maybe. Then after preassembly of new ones, it took maybe 20 mins to install completely. Give yourself 1:30 hrs of time and enjoy your truck not sagging around town when loaded.

I have had zero problems with the Timbrens on my truck. I have pulled our camper and several tag along trailers hauling equipment and parts. They do exactly what they are supposed to. Saves on sag by over an inch. No complaints here.
Lance M - 06/08/2020


They work great! Keeps my F-250 level when pulling my 37 ft fifth wheel. No more headlights shining in the trees.

2014 Ford F-250 and F-350 Super Duty

Installed the Timbren stops as instructed. Total time was about 30 minutes. The installation would have been half that but one stock stop was tough to remove due to rust.
I'm very pleased with the looks of the installation, quality of the product and the service from etrailer. I'll report back next week after I hitch up to my 5th wheel but I do expect everything to be good.

2016 Ford F-250 Super Duty

I like the performance of this product. It has helped tremendously carring a loaded trailer. I haul 15,000 lbs on a regular basis.

It is still doing great.
Eric - 03/30/2019


Product is as advertised. Not as versatile as airbags but not as much to go wrong with as airbags either. Nice compromise. etrailer was awesome from ease of finding product that fits my F250 to quick shipping and informative installation video.

2013 Ford F-250 Super Duty

Excellent quick shipping. The install on my 2013 F-250 was very straightforward and quite easy. Product seems very well made. Just as mentioned, they sit about 3/4 inch from making contact while the truck is unloaded, so does not affect the empty ride. I have not towed with them yet, and am looking forward to seeing how they handle the load.

2016 Ford F-250 Super Duty

I had thought I wanted air bags for my 2016 F250 but after talking to some friends I decided to give these a try. EASY installation, and they Work! My truck is not equipped with the factory overload springs and once I loaded my 7x14 dump trailer the suspension sagged a lot. Once the Timbrens were installed the truck sat much more level and drove a lot better! Highly recommend!


These rear SES bump stops were very easy to install. The driver side was a little more difficult due to the wiring harness on the chassis. I installed the at dusk going into darkness with a little light (that was free) from Harbor Freight. It only took about 30-40 minutes to remove the stock bump stops and to install the Timbren SES. I will be using to assist in hauling my fifth wheel camper.

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Is Timbren Rear Suspension Enhancement Sold in Pairs
    The Timbren # TFR250SDG is sold in pairs one for each side of the axle.
    view full answer...
  • Rear Suspension Enhancement Recommendation for a 2012 Ford F-250 4x4 Crew Cab Diesel
    The Timbren suspension enhancement, # TFR250SDG, that you have referenced is my first choice for your truck. The Timbren springs are designed to do exactly what you need plus they will reduce side to side body roll, absorb road shock, and will not affect the empty ride of the vehicle. When you have a load in the bed, like your 5th wheel trailer, the bed will drop and what the Timbren springs do is take of the gap between the axle and frame more than the factory bump stops. This is what...
    view full answer...
  • Will Timbren Rear Suspension Enhancement System # TFR250SDG Fit 2011 Ford F-250
    The rubber springs on the Timbren Rear Suspension Enhancement System, # TFR250SDG, measure 4-1/2 inches tall and this system has been confirmed to fit your 2011 Ford F-250 Super Duty. I have included the installation video for you.
    view full answer...
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  • Does Timbren Kit TFR250SDG Fit 2WD and 4WD 2016 Ford F-250
    Yes, the correct Timbren kit for your 2016 Ford F-250 4 wheel drive is the part # TFR250SDG that you referenced. We have some of the fits separated by 4WD or 2WD since some of them only fit one or the other, but the Timbren kit fits both styles.
    view full answer...
  • Total Height of Timbren Spring Kit TFR250SDG Including Bracket
    I spoke with my contact at Timbren and he informed me that the overall height of the Timbren kit part # TFR250SDG is 6-1/2 inches including the spring and the bracket.
    view full answer...
  • Recommending a Timbren Suspension Enhancement System for a 2011 Ford F-250
    Air bags certainly have their uses, but for hauling with a fifth-wheel hitch, I recommend Timbren Rear Suspension Enhancement System, # TFR250SDG, for your 2011 Ford F-250. The pair of rubber springs will increase the stability of your vehicle, reduce sag and limit body roll. They are also simpler to install and will not require the type of regular maintenance that air bags might. I have added links to a video review and installation on a 2011 Ford F-250, as well as a link to a help article...
    view full answer...
  • Do Timbren Suspension Enhancement Springs Affect Unloaded Ride Quality
    We have found that it varies a little bit between vehicles. For some vehicles the unloaded ride quality is totally unaffected with the Timbrens. Typically this is on higher capacity vehicles where the suspension is already pretty stiff and doesn't move much when unloaded. On lighter duty vehicles where the suspension moves quite a bit some people have reported an increase in harshness from the Timbrens. For your 2012 Ford F-250 you probably wouldn't feel them.
    view full answer...
  • Lubricant to Aid Factory Bump Stop Removal on 2013 Ford F-250
    You might try applying some spray-on lubricant like WD-40 or PB Blaster to the bolt that secures your factory bump stops. This may require repeated applications and some time for the solvent/lubricant mixture to work its way into the threads. Otherwise you might need another set of hands to hold the rubber stop while you apply your wrench or socket.
    view full answer...
  • Timbren Suspension Enhancement System For 2016 Ford F-250 Pickup Truck
    The Timbren Rear Suspension Enhancement System, part # TFR250SDG is the correct system you need for your 2016 F-250, whether it is a 2WD or 4WD. There is no drilling required for installation and this system can be used on trucks with or without the overload springs. These are designed to replace the bump stops you have installed on the truck. The system is designed for the rear of the truck and will not increase the weight carrying capacity for your truck.
    view full answer...
  • Where Do Timbren Suspension Enhancement Springs Install on a 2013 Ford F-250
    The rounded platform that comes into contact with the Timbren springs # TFR250SDG on your 2013 Ford F-250 will not be an issue. The Timbren springs install in place of the factory bump stops that would also come into contact with this platform. The Timbren springs are bolted into place and centered over that platform and cannot move so there is no worry of them slipping off. The bed, when loaded down, will come straight down compressing the suspension so there is no worry of it coming...
    view full answer...
    Image 1 for
  • Will Timbren Suspension System Help Smooth Ride For 2013 Ford F-250 Hauling A 5th Wheel Trailer
    For your 2013 Ford F-250, the Timbren Rear Suspension System, part # TFR250SDG, should work just fine. These install in place of the factory installed bump stops so they should not interfere with the fifth wheel installation at all. These are designed to provide additional support as needed when carrying light loads, and become more rigid as more weight is added. One of my co-workers has these installed and said that when traveling over very rough roads, these will cause the ride to be...
    view full answer...
  • Height of Timbren Suspension Kit # TFR250SDG
    The spring length for the Timbren kit part # TFR250SDG is 4-1/2 inches and then the height of the brackets is 3 inches.
    view full answer...
  • Recommended Timbrens for a 2016 Ford F-250
    Yes, the Timbren Rear Suspension Enhancement System part # TFR250SDG is correct for your 2016 Ford F-250 and will do an excellent job of helping to eliminate the rear end sag. This system is very popular are works really well in a multitude of different applications such as towing a heavy 5th wheel trailer. They are also very easy to install as you can see in the attached video which cuts down on cost.
    view full answer...
  • Dimensions of Timbren Rear Suspension Jounce Spring TFR250SDG for 2011 Ford F-250
    On Timbren rear axle jounce spring kit # TFR250SDG the brackets are 3-inches tall and the spring itself is 4-1/2-inches tall. These offer no-drill installation in your 2011 F-250 2WD gasser as shown in the linked video.
    view full answer...
  • How Does the Timbren Rear Suspension Enhancement System Install On a 2015 Ford F-250
    I did not catch what kit you were using but if you have a 2015 Ford F-250 then the correct Timbren Rear Suspension Enhancement System is part # TFR250SDG. If this is the kit you have then these will actually attach to the frame and then center over a contact point which is attached to a block under the leaf spring pack. It does not make contact with the axle beam nor does it need to be perfectly centered over this. I have attached a photo to clarify the above for you.
    view full answer...
    Image 1 for
  • Recommended Timbren Suspension Enhancement System for a 2016 Ford F-250 With In-Bed Camper
    Any suspension enhancement, like the Timbren Rear Suspension Enhancement System # TFR250SDG which fit your 2016 Ford F-250, are only meant to supplement a suspension system that is in good working order. If, by adding the slide-in overhead truck camper, you are exceeding the max capacity for your F-250 then the Timbren system will not be the solution. You will either need to get a different truck or a smaller camper. If, however, you are not exceeding the weight capacity for your F-250...
    view full answer...
  • Timbren Kit that Fits 2016 Ford F-250 Towing Fifth Wheel
    Yes, the Timbren kit part # TFR250SDG is the correct fit for your 2016 Ford F250 and would do a great job getting rid of the sag it is experiencing when towing. I attached an install video for more info for you to check out as well.
    view full answer...
  • Height of Timbren Rear Suspension Enhancement System for a 2013 Ford F-250
    The correct Timbren Rear Suspension Enhancement System for a 2013 Ford F-250 is part # TFR250SDG. The overall height of the assembly is 6-1/2" per Timbren. The 1" of space you have between the frame and bump stop should not altered the unloaded ride quality. They typically design these kits so that there is around 1" - 1-1/2" between the frame and bump stop so this kit is right on par with that.
    view full answer...
  • Is it Normal for Timbren To Not be Centered Over Axle Mount
    It's not super common that the Timbrens like the # TFR250SDG aren't centered above the axle plate like what you have but we do see it occasionally. In your situation it appears as if there is possibly an alignment issue with your rear axle based on how one side is forward and the other to the rear. Does truck track straight?
    view full answer...
    Image 1 for Image 2 for
  • Timbren Suspension Enhancement Recommendation for a 2014 Ford F-250
    I spoke to my contact at Timbren, I explained your situation and they said that in your situation you could go ahead and use the Timbren System part # TFR250SDF. The mounting bracket is the same as the # TFR250SDG with the only difference being the 1 inch spacer included with the # TFR250SDF. Before you do this I would recommend you go out and double check the measurements you took on your truck. I attached an install video for you to check out also.
    view full answer...
  • Correct Timbren Rear Suspension Enhancement for a 2013 Ford F-250 4x4
    The Timbren Rear Suspension Enhancement System # TFR250SDF that you referenced is designed to fit 2005-2010 Ford F-250 pickups so for your 2013 F-250 you want the Timbren # TFR250SDG kit instead. This kit is essentially the same thing with the only difference being a higher weight capacity at 8,600 lbs as opposed to the 6,000 lb weight rating of the kit you referenced. Please note that suspension enhancement is designed to be a supplement to your OEM suspension and doesn't increase the...
    view full answer...
  • Timbren Suspension Kit Recommendation for 2014 Ford F-250 Towing Fifth Wheel
    A Timbren setup would be a great way to reduce sag on your 2014 Ford F-250 when towing your fifth wheel. The part # TFR250SDG would be the kit to use and not the part number you referenced. Unlike air suspension kits this would not interfere with your fifth wheel rail brackets or require you to maintain air pressure in the bags. I attached an install video for more info as well.
    view full answer...
  • What Timbren Rear Axle Suspension Kit Best for 2013 Ford F-350 DRW Pulling 5th Wheel Trailer
    Rubber jounce springs such as the Timbren # TFR250SDG that you referenced offer several advantages over air springs. Jounce springs generally cost less, they are easier to install and they require no maintenance or periodic adjustment. Also, since jounce springs do not engage the axle unless the vehicle is under load normal everyday ride quality will be unaffected by their installation, but when under load they will provide progressive resistance as the load increases. Please note that...
    view full answer...
  • Recommended Sockets Needed and Timbren Springs for 2011 Ford F-250
    The factory nut size on your 2011 Ford F-250 has a 15 mm nut to remove your factory bump stop. I've attached a video of the uninstall and installation of the correct Timbren springs to assist. The Timbren Rear Suspension Enhancement System # TFR350SDF you referenced is only a fit for the F-350 model. You will instead want # TFR250SDG for your F-250 which will have a bolt head that is 9/16 inch. I confirmed this with the manufacturer for you.
    view full answer...

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