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  1. Vehicle Suspension
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Timbren Suspension Enhancement System - Rear Axle

Timbren Suspension Enhancement System - Rear Axle

Item # TJRC01
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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. Lowest Prices for the best vehicle suspension from Timbren. Timbren Suspension Enhancement System - Rear Axle part number TJRC01 can be ordered online at or call 1-833-496-1390 for expert service.
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Timbren Vehicle Suspension - TJRC01

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

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 and handling
    • Prevents body roll with improved weight distribution
    • Stabilizes the front or rear of the vehicle for better handling of heavy loads
  • Adjusts progressively to the road and the load so you always have a smooth, comfortable ride
    • Allows the spring ample movement while it provides cushioning for light loads
    • Increases stability and enhances performance when you are cornering, swerving or hauling large loads
  • Takes the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
      • Designed to work with a suspension system that is in good working order
    • Requires no air hoses, compressors or manual adjustments
  • Offers pre-loaded, continuous support to your vehicle's suspension


  • Includes 2 hollow rubber springs, vehicle-specific brackets and hardware for a simple installation
    • Installs directly onto frame
    • No drilling required
  • Capacity: 3,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Lifetime warranty
  • Satisfaction guarantee

Reduced rear axle sag with Timbren suspension enhancement

Whether you're hauling heavy loads in your bed or cargo area or 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 your rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the leaf 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.

Action 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.

Trailer swaying as it is towed behind a truck

Because your 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 SES

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.

JRC01 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TJRC01 Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Timbren Suspension Enhancement System - Rear Axle - TJRC01

Average Customer Rating:  4.7 out of 5 stars   (4473 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.

2009 Nissan Xterra

Installed kit on 2009 Nissan Xterra on place of factory rear bump stops. It greatly reduced the hard bottoming out when carrying passengers or a load in the back. This is an easy fix to an annoying problem.

I did find it easier to remove the rear wheel for installation. This gives direct access to the bump stops.

2009 Nissan Xterra

Quick delivery from Etrailer.. Thank you! I put these on my 2009 Xterra Offroad. Install was easy. I jacked up one side at a time, removed the wheel and had great access to do the swap. My leaf springs are original and likely sagging a bit.

Without load, there is a .75" space between these bumpers and the u-bolts/axle (Note: Contact points on the axle are not ideal. These do not have clean contact with the axle as the OEM bumpers did. Instead they contact the u-bolts first then squeeze down towards the axle). Which generally offers an unchanged ride for day to day driving (except for when you hit big bumps/dips. Then you can feel the stiff bumpers).

With load (trailer, tongue: 200 lbs) these bumpers sit on the u-bolts. Ride is definitely stiffer/less hitch float. However, larger bumps are a bit jarring as you are sitting on the bumpers. Also, if you get into rough stuff, these limit your axle articulation some. I think adjustable air bags may have been a better solution, even though a bit pricier.

Thanks etrailer!

2011 Nissan Xterra

I bought these for my Xterra to help eliminate sag when towing. I don't tow a lot and I liked the idea that these units wouldn't affect the ride the rest of the time.

First impressions of the quality. The thickness of the steel brackets is great almost look heavier than they need to be. The rubber springs are very solid and seem like they will last a long time. The included hardware seemed to be of good quality as well. My only complaint was the finish on the brackets. At this price point I was hoping they would be powder coated but they are painted. Not a huge deal but right out of the box some of the paint was flaking off like the parts weren't prepped properly. I ended up scuffing them down and spraying two coats of bedliner on them. I am hoping that will help keep them rust free.

Installation was very easy and I had no problems getting them pretty centered over the axle. I did have the opportunity to tow since the install and they really did make a huge difference. I gained about 2 inches of height when fully loaded. The ride of the vehicle was very good and the handling was very stable. I drive this vehicle every day and when not towing it is a little stiffer at times, but certainly not enough to be a problem. I am at 60k now and plan on replacing my shocks shortly so I am hoping that will help.

Overall, it was a worthwhile upgrade and I would do them again in a minute.

These are still holding up great a year later. I’ve pulled a loaded trailer twice in the last month and it keeps the Xterra perfectly level. I have not noticed any harshness in the ride with a loaded trailer, but when not towing it can get a little bumpy on rough roads. Not enough to cause any controversy problems and I still think these are an easy solution.
Ryan C - 06/28/2018

2011 Nissan Xterra

Both the Timbren product and the etrailer service are excellent. I have a 2011 Nissan Xterra and purchased the TJRC01 system to stop the bottoming out I was experiencing over bumps and dips in the road. The Timbren system was super easy to install. I just jacked-up the car one side at a time and removed the wheels first to gain access to the bump stops. The whole process took less than an hour. My car is only 5 years old, so the old bolts were not rusted on and came off easily (I did use a little PB Blaster, so that may have helped). The ride now over the same old bumps is sooooo much better. Thank you -

2007 Nissan Xterra

I put the Trimbrens on my wife's 2007 Xterra in the hope that it would take the shock out of the rear end bottoming out especially on speed bumps and road bumps with any kind of weight in the back. The Timbrens work as advertised and eliminated the harsh contact between the frame and the axle. Installation took about 20 minutes total with air tools.

Nissan Xterra

Installed on an Xterra S. Took less than 30 minutes, very easy. On the Xterra, it is constant contact with the axle. The ride is more firm but not uncomfortable. I'm using it to pull my Casita camper (tongue weight about 350 lbs). This Timbren package levels the vehicle for a very stable ride and elimanes the need for an unusually high rise hitch. Recommended.

2005 Nissan Xterra

I call it a “poor man’s suspension upgrade”. The installation was straightforward and it took a few months to break-in, but I’d definitely recommend the product and prefer it over the stock bump stops.

2012 Nissan Xterra

The Timbren kit I bout for my 2012 Xterra was as easy to install as the pictures and directions showed. It worked perfect and leveled everything out for towing our travel trailer on a 2500 mile road trip. Great product and at a better price point than the other options.

Nissan Xterra

Needs a little more slot in base plate. I could not line up to center of axle. With that said it works great and has taken out those harsh bumps.

Nissan Xterra

Awesome Product , if you have a lifted Xterra add the extra washer
etrailer rocks thanks for the fast shipping


Great solid product!

2008 Nissan Xterra

I have used these on both of our vehicles, and they do a great job of improving handling and load hauling ability.





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


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).


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Installed these with only one issue, which was on the driver side rear axle. The axle had a ABS sensor cable bracket on the axle that need to be readjusted and trimmed down. The BumpStock was hitting this bracket on one edge. So actually, it's not and exact fit. But this issue is really a FORD placement issue of that cable. So just be aware that some extra work may be needed to install them. Passenger rear side install perfectly. Next is the drive to see how much better the coach drives, heard great reviews on that


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Worked great on our 2019 Honda Odyssey Elite to the East coast.Fully loaded with 4 people and a car top carrier,the Timbrens kept the van stable and level.
Sold the 2019 but took the Timbren system out and put them in our new 2022 Elite. Very easy to install, highly recommend.


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.

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

by: 08/20/2022

Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Easy r&r on our NV200
Attached photos
show the stock bumpers
alongside the newly installed Timbrens,
which exceeded my expectations. Use photos as
you wish. JW


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

I really like these Timbren bump stops. I think the best thing about them is the simplicity, both how they work and how easy the install was. I bought these when I added a dump insert (similar to a salt spreader) into my 2019 F-250. I have loaded this truck heavy before with dirt and the truck sagged tremendously and had a lot of body roll. To prevent this with the now added dump insert, I installed these. Super easy to install! Took maybe 30 min. It reduces body roll and seems to improve the ride depending on how loaded the truck is.

One unfortunate consequence to the install is that the Timbrens brought to light that I have a weak leaf spring on my passenger side, which was suspect previously.

Overall, I'm very pleased with this purchase and would buy again!


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.


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Delivered a day early, easy installation, just what I was after for my 2010 2500,with a leveling kit 63 gal auxiliary tank,generator, tools, and the like in the bed,probably 1000 pounds or so,300 or so behind the center of the rear axel, not so much by choice just the way it had to be ,these got rid of that annoying little squat,much more satisfied with the stance with the tongue weight on it,easy order easy delivery , you can see the before and after, awesome product!!


Review from a similar Timbren Aeon Spring System in Vehicle Suspension

Ok, the drivers side was very easy to install. Maybe 15 minutes. The passengers side was another story, the rear bolt was very difficult to get at and took a great deal of time and creativity to get the bolt tight do to no room to turn the wench.
That being said it did improved the ride a great deal with no load, I drive country roads that are very rough , it completely stoped the wheel hop and provide a much better ride.
I would recommend installing these I’m glad I did! I would give this 5 stars if it were not for the passenger installation.

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • How Tall are Timbren Springs # TJRC01 for a 2014 Nissan Xterra
    The springs in Timbren kit # TJRC01 for your 2014 Nissan Xterra are 3-3/4 inches tall. They also come with 1 inch spacers should you need the additional height. Once installed there should be just a slight gap between the top of the axle and the bottoms of the Timbren springs. I have included a link to the instructions for you.
    view full answer...
    Image 1 for
  • Will Timbren Springs Eliminate Sag on 2011 Nissan Xterra Towing a Horse Trailer
    Sag caused by the tongue weight of a trailer is best resolved using weight distribution, not suspension enhancement, but if you do not want weight distribution then using Timbren springs would help. And they would likely eliminate most, if not all, of the sag on your 2011 Nissan Xterra. The Timbren springs # TJRC01 are rated for up to 3,000 pounds so they can easily handle the tongue weight of your horse trailer loaded or empty. I have included a link to the installation instructions for you.
    view full answer...
  • Should the Timbren System part # TJRC01 Fit Loosely
    The Timbren System part # TJRC01 that you referenced should not fit tightly. I spoke to my contact at Timbren and he advised me to tell you that you would want to assemble system off of the vehicle on a work bench using vise grips to hold the assembly so that you can get everything torqued down good and tight and then install it on your Nissan Xterra.
    view full answer...
  • Recommended Suspension Enhancement for a 2013 Nissa Xterra that Bottoms Out and Sways
    The Timbren # TJRC01 provides the leveling and stabilization you are looking for. These rear axle suspension rubber springs replace your factory original bump stops and require no drilling to install. Typically, we only recommend the front suspension if you are using a snow plow or carrying a front load. I recommend starting with the rear and if that doesn't perform to your desired stiffness, then upgrade the front suspension as well. Adding a more rigid setup to both axles could make...
    view full answer...
  • Recommended Timbren Springs to Help Bottoming Out in 2007 Nissan Xterra
    For your 2007 Nissan Xterra I recommend going with the Timbren Active Off-Road Bumpstops # TABSJRC01 that you referenced. These are really designed for exactly what you're needing them for on your Xterra. They will replace your factory bumpstops and while they won't completely prevent you for bottoming out (no suspension enhancement system will), they are specifically designed to cushion the impact when it does happen so you don't experience that spine-crushing jolt. I actually also called...
    view full answer...
  • How to Order a Custom Timbren Suspension Enhancement System for a Jeep Cherokee Lifted 5-1/2 Inches
    We have front, item # TJFC01, and Rear, item # TJRC01, Timbren Suspension enhancement systems for the 1992 Jeep Cherokee. Since you have modified your suspension, you will need a custom Timbren SES kit which is available. You will need to call Customer Service department, see link, with the following information at hand: Year, make, and model of your vehicle Whether it is 2-wheel or 4-wheel drive Measurement from the top axle to the bottom of the frame directly above the axle Once...
    view full answer...
  • Helper Springs for a 2007 Nissan Xterra S-V6 4x2 Towing 4,500 Pound Travel Trailer
    For your 2007 Nissan Xterra I recommend Timbren springs # TJRC01 which is going to help with rear end sag as well as reduce body roll (side to side movement) and overall greater stability and reduced stress on the factory suspension. The StableLoad system, # TLA7311, engages overload springs sooner so the stress is still on the factory suspension. This is a good option if there is something on the vehicle preventing installation of helper springs but for your situation I would go with...
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  • Timbren or RoadActive Suspension Kit Recommendation for 2012 Nissan Xterra
    Overall the RoadActive Suspension kit part # RAS4529-XT will be better. It will give you the additional support you want, it will help make the vehicle handle better, but what really makes it stand out is that it won't make the ride quality as harsh as the Timbren # TJRC01 would.
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    Image 1 for
  • Recommended Suspension Enhancement System for Occasional Towing with 2010 Xterra 4x4 on Rough Roads
    I recommend the SumoSprings # SSR-210-40 for your 2010 Xterra 4x4 since you'll be towing and hitting rough roads occasionally. These are specifically designed to provide extra support to your existing springs while maintaining a smooth ride when driving down the highway without additional weight. The Timbren Suspension Enhancement System # TJRC01 is better suited for vehicles that tow heavy loads on a regular basis and they may be a little stiff on rough roads. Please check out the attached...
    view full answer...
  • Rear Helper Springs for a 2014 Nissan Xterra 4x4 Towing a 5,000 Pound Trailer
    For your 2014 Nissan Xterra 4x4 I recommend the Timbren helper springs # TJRC01. Timbren springs get progressively stiffer the more weight is put on them to better support the vehicle when under load. When not loaded or towing a trailer you may experience a little bit of a stiffer ride. I have included a link to our help article on Timbren springs for you.
    view full answer...
  • Recommended Suspension Enhancement for 1999 Jeep Cherokee
    For your 1999 Jeep Cherokee, the Timbren Suspension Enhancement System - Rear Axle # TJRC01 and front suspension # TJFC01 are confirmed to fit your vehicle. Both install where your factory bump stops are and help with the stability and load of your Jeep. They help reduce body roll and keep your Jeep from squat under the trailer weight. They are a big help when under load and won't engage unless you hit a big bump when unloaded. They are a firm aeon rubber material, so if you want...
    view full answer...
  • Timbrem Vehicle Suspension Enhancement Recommendation for 1998 Jeep Cherokee with 2 Inch Lift
    The Timbren Heavy-Duty Front or Rear Suspension Enhancement System, # TJRC01, does come with a spacer designed to adjust ride height which will take up some of the space created by the 2 inch lift. However, you will most likely need to use spacers as well. We have 1 inch spacers, # A25723-90AH00. I would recommend using the front kit, # TJFC01, if you plan on carrying a plow on the front or doing some winching, or if you are looking for more stability at the front of the Jeep. I have included...
    view full answer...
  • Will Suspension Enhancements for Towing Work On a Lifted 2000 Jeep Cherokee
    The only option we have for suspension support that will fit a lifted 2000 Jeep Cherokee is from Timbren, the Timbren Suspension Enhancement System part # TJRC01. In order to be compatible with the lift you'd need to add spacers to compensate for this, part # A25723-90AH00 is correct and can be stacked. There aren't any spacer options from AirLift or SumoSprings for this vehicle and they won't work as is with a lift.
    view full answer...
  • Suspension Enhancement for 2000 Jeep Cherokee with 1.75 inch Lift
    I have a solution for your, but the Air Lift kit you mentioned can't be installed on lifted vehicles since there isn't a spacer kit that will work with it. Instead you'll want the Timbren kit part # TJRC01 which fits your vehicle and then you'll need to use a spacer on either spring part # A25723-90AH00 and you'd be set. You'll need to provide longer hardware to attach the spacers as that's not included.
    view full answer...
  • How To Prevent Sag While Towing with a Lifted 2012 Nissan Xterra
    I do have an option for you but the SumoSprings Solo Custom Helper Springs part # SSR-210-47 are not the best option for a lifted vehicle because they don't come with spacers nor are they offered separately. The option to make your own spacers is certainly possible however, if you use the Timbren Suspension Enhancement System part # TJRC01 which is a very similar kit you can use a combination of both part # TA25723-90AD00 and part # TA25722-90F00 until you get the gap down to 1/2"-1-1/2"....
    view full answer...

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