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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 # TWRW22
Retail:$547.61
Our Price: $465.47
You Save: $82.14
Vehicle Suspension

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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 TWRW22 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TWRW22

  • 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.


Features:

  • 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


Specs:

  • 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.



WRW22 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TWRW22 Installation instructions

This Product Fits The Following Vehicles




Video of Timbren Rear Suspension Enhancement System

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Timbren Vehicle Suspension - Rear Axle Suspension Enhancement - TWRW22 Review

Today we're going to take a look at the Timbren Rear Suspension Enhancement System. Now this is a custom fit part. It is designed to fit the 2000 to 2011 Work Horse P Series and W series chassis models. Now in any custom fit part, I always like to recommend for you to go to our website, use our fit guide, put in your year and model vehicle and it'll show you if this part will work for your application. Now this will improve the suspension, handling and safety of your vehicle. Provides additional support as needed so you always have a nice, smooth comfortable ride. It will allow the least spring ample movement, while cushioning light loads, so it does not affect the empty ride of your vehicle. Now these do become more rigid as more weight is added, helps increase stability, providing great performance while hauling heavy loads.

Helps reduce vehicle sag. Now these do work independently side to side, helps compensate for any off-center loads. They do reduce body roll when you're swerving or turning corners, and will also act as shock absorbers taking the brunt of any bumps in rough roads. This will help extend the life of your vehicle's suspension. Includes everything shown here, the two AEON hollow rubber springs, the vehicle specific brackets, the hardware for nice, simple installation.

Comes with a nice set of detailed instructions on how to install everything. Now these do replace the actual bump stops on your frame, so there's no drilling required. Specs on this, the weight capacity is 8,600 pounds. You do want to make sure not to exceed your vehicles weight bearing capacity. And the last note is these are designed to work with a suspension system that is in good working order. But that should do it for the review on the Timbren Rear Suspension Enhancement System.

Customer Satisfaction Score:


Customer Reviews

Timbren Rear Suspension Enhancement System - TWRW22

Average Customer Rating:  4.7 out of 5 stars   (4787 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.

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Timbren is a nice product but overpriced for what you get. They did give my motorhome a bit more sway support but made the ride more sharp, even on small cracks/bumps in the road. A sway bar would have been a much better way to go.




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These “overloads” are such a great answer to suspension needs! They are made with high grade materials and the installation was a snap! I would buy them again many times over! Don’t mess with air bags, compressors, air lines and all that “stuff.” These are the deal!! Pictures of before and after. Simple way to add significant suspension payload quickly with little fuss.




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I've had them installed for a year, still working great! Easy installation with no drilling needed. Simply bolt right in. Great product.




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Its ok but not that differences, highly recommended for air bags instead these




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The hardest part was the de-installation of the factory bump stop. Installation of the Timbren’s was simple and easy.

My truck is 2008 F250 V10 Crew Cab 4x4 with factory overload springs. I have a B&W fifth wheel & gooseneck hitch installed. I did notice the difference in towing my 34’ fifth wheel trailer. The ride and handling was improved. I would recommend them.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


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.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


They may be a great product but they did not work on my 22 f350. Even with the spacers provided they would not make contact with the trucks axle even with a heavy slide in camper. If I am going to keep them I’ll have to make welding modifications to extend the bracket so it will work on my truck model pictures with and without the camper loaded.



I would like to update my review to say that Timbren came through and made my application work by sending me the right parts so my truck doesn’t squat and it handles my truck camper much better. Timbren has great customer service


Comments
I see what youre saying here. From the photos, it looks like you have everything set up the way it should be. 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.
-- Etrailer Expert Brooke M - 12/29/2022


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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


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.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I installed Timbren on front and rear of Georgetown motorhome. The install was easy and the improvement in overall handling was noticeable. No more bottoming out on bad roads, and a reduction in sway or lean in and out of turns. Worth the money, especially in conjunction with my other bolt on upgrades. Safety steer, Rear sway bar, and Rear trac bar




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The Timbren rear suspension enhancement system helped with the truck swaying side to side when the slide in camper is on the truck.
The photos show right and left rear with Timbren’s installed (2 photos), with slide in camper on the truck (2 photos) and when the camper was removed (2photos).




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have used Timberns on 2 other vehicles, a Toyota 4Runner and an S10 Blazer with out complaint.

I transport RVs as a contractor for an RV transport company. My truck is 2021 Ram 3500 crew cab, 6.7 diesel.

Because the weight of the units is different with each unit I haul I wanted an easy, no maintenance solution to maintain as level a ride as possible. I haul both bumper pull and 5th wheel units. In addition to the weight of the unit I'm hauling I can carry 110 gallons of fuel with both the factory fuel tank and my auxiliary tank. Additionally, there is the weight of my Curt 25K 5th wheel hitch, Curt 14K equalizer hitch and bars, and approximately 300 pounds in tools.

I don't have to worry about airbags not inflating. The suspension settles about an inch before making contact with the Timberns. Squat while loaded is negligible. The ride empty is the same as it was before installation. The ride loaded is smooth and controlled even when hitting large bumps at highway speeds.

Installation was simple and straightforward. It took me about a half hour.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Went on fairly easy, jacked the rear of truck up pulled out old bump stops,soapy water on new ones positioned them and with the help of two short pieces of 2×4s under each side lowered the truck, they slid right in place. Very easy. Won't be hooking up to 5th wheel for a couple of months, looking forward on how they work on truck squat. Might follow up then and give another star.


Comments
1 year later, they work as advertised, kept rear of truck at a more level stance, also a very smooth ride with very little bounce over rough highways. I would highly recommend.
Paul - 01/14/2023


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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product, it works perfect on my truck. Sometimes I tow up to 30k lbs including my trailer and my truck stays level. No more high beam flashing in my eyes from drivers going in the opposite direction on the road.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


They definitely support and did lift my 2014 toyota tundra up about 1.5 inches.
This application with my weight has trunk riding on the cushions all the time.
That has teavel and bounce issues that do make some driving situations interesting.
I may go ahead and replace with airbags but for now support things well!




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I used this on my Isuzu tow truck. The blocks in and of themselves are fine, they support the weight. Here's the problem: They are pre-loaded, meaning that they always touch between the frame and the rear axle. As you load the vehicle this puts more pressure on the frame in this 5" area where the blocks are. The springs have not yet taken as much weight as they normally would. Now, all this upward pinpoint pressure bends the frame. This is what happened to me on my rollback tow truck. After many hours and now double plating the frame all is well again, but a tremendous amount of work. Yes, the blocks are fine, but the result of installing this product resulted in a bent frame. The vehicle was not overloaded and was within the GVWR.


Comments
I have reached out to the manufacturer who will be reaching out to you.
-- Etrailer Expert Jenny N - 01/20/2022


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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Makes my truck feel better while towing a 5th wheel camper, especially over expansion joints of the expressway.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Very simple to remove and install. I took all of 15 minutes without even removing the wheels




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I think I will be very happy with the ride when I tow our fifth wheel, it definitely needed the extra support especially on rough roads.I chose not to use the spacers because I like the softer ride when the truck is unloaded.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


2022 Ram 3500, 30 minute install time, great product. Hooked up camper without sway bars and only squat 3/4 inch, where before 4 to 5 inches. Recieved product in 3 days with etrailer staff sending me numerous emails. Great job to etrailer staff. Thanks




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


After a year on the road, and a few thousand miles of towing our 5th wheel, the Timbren bump-stops work great. Had air bags that required tinkering and always needed to adjust the pressures. No adjustments needed with Timbren.
Pros: Easy to install, no adjustments, adds stability while towing heavy loads.

Cons: Unloaded, makes driving over seriously large bumps a bit rough with only about an inch or so of factory suspension travel.




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


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




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Review from a similar Timbren Aeon Spring System in Vehicle Suspension


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.



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See what our Experts say about this Timbren Vehicle Suspension

  • Size of Bolt that Comes with Timbren Kit part # TWRW22
    The bolt size that comes with the Timbren kit part # TWRW22 is M10x60mm x 1.5. Basically just enough of the bolt comes through the assembly and frame to secure it with the nut on the truck frame.
    view full answer...
  • Is Weight Capacity for Timbren Suspension Kit # TWRW22 for Both Springs or Per Spring
    The capacity of the Timbren Rear Suspension Enhancement System # TWRW22 that you referenced is 8,600 lbs for both sides together. You should note that these kits give you additional suspension support but they do not add to the capacity of the vehicle. They only allow you to carry your current capacity in a safer way.
    view full answer...
  • Recommended Suspension Enhancement for 2007 Winnebago on Workhorse Chassis
    Based on my research, it looks like your 2007 Winnebago Voyage 33V was built on the Workhorse W20 chassis with 4-wheel drive. I do recommend verifying this information with your paperwork for the RV, as it looks like there were a few different models of that Winnebago. For suspension enhancement, I recommend the Timbren Front Suspension Enhancement System # TWFRW22 and Rear Suspension Enhancement System # TWRW22. These are jounce-style springs like the ones you were looking at that will...
    view full answer...
  • Timbren Rear Suspension Enhancement System for a Food Truck on a 2005 Workhorse P42 chassis
    I have a great solution for you that will not require you to lift your food truck. I recommend the Timbren Rear Suspension Enhancement System item # TWRW22.These hollow rubber springs have an 8,600 lbs capacity and sit above the rear axle to help stabilize and level your food truck. They work independently from side-to-side to minimize sway and help compensate for off-center loads. We have had other customers, with food trucks, use these successful and write us back. We also have a set...
    view full answer...
  • Timbren Suspension Enhancement For 2003 Winnebago Adventurer 38G
    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 # RM-RBK22-RSSA...
    view full answer...

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