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  1. Vehicle Suspension
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  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
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Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TGMRC20
Our Price: $252.45
You Save: $44.55
Vehicle Suspension

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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. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TGMRC20 can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMRC20

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

3,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


  • Improves suspension, handling and safety
  • Provides additional support as needed so you always 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: 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
  • Limited lifetime warranty - satisfaction guarantee

An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.

Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.

Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your vehicle level.

Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's side or passenger's side of your vehicle. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you are hauling off-center loads.

An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.

An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.

Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. And more elasticity allows for a more comfortable ride because the rubber has more travel.

GMRC20 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRC20 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Rear Suspension Enhancement System - TGMRC20

Average Customer Rating:  4.7 out of 5 stars   (5744 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.


I was getting a lot of swaying pulling my camper until I put the timbren rear suspension enhancement system on my truck what a difference it made it work well for me

1988 Chevrolet Suburban

Haven't had an opportunity to put these on yet. Heck, haven't even bought the travel trailer that makes these necessary yet. But they look like what I need and they seem well built. I'll update when the time comes.


1985 Chevrolet Blazer


About a 1/2 inch difference in gap at the bump stop perch but still within parameters. Truck sits perfect with trailer attached. Haven’t towed yet. After towing if they perform like they should will upgrade to a 5 star. Easy to install, definitely needed 2x4 and jack. 2011 Silverado ext cab with 30 ft Genisis 5th wheel.


Haven’t had it on long, but so far so good. 1999 F350 dually. Bolted up nicely. Total job took 10 minutes. Have hauled two gooseneck loads of hay and truck drives SO much better. Nice and level. Money well spent so far.


very good product ,received just in time and fit perfectly on my GMC savana 2000 .Be sure to clean the two receptacle thats help.
très bon produit , reçu dans les délais et s'ajuste parfaitement . Assurez-vous de nettoyer le receptacle cela facilite l'installation.


I know it will be lovely when loaded or the trailer on. However,it rides like a wagon empty with brand new premium shocks and struts empty. Thud thud thud. You really cannot feel the shocks or suspension. Found exact same item plentiful for 60 bucks on eBay after I bought these for 250. I may cut these in half or put air bag on. I do not like the ride empty. No hard feelings. It is a good product maybe just not for me.


The timbrens actually did what they were suppose to do. However, once I starter driving out west I notice the timbrens were riding on the axle which cause the speedometer to jump around depending on the road. I would recommend them if you are hauling or towing a camper or RV. I was going to contact etrailer about maybe removing a spacer for one set however the other set came as one unit. The bottom line is the Timbrens does stabilize your load for safe travels. I will be contacting etrailer soon to assist in correcting the problem...Road trip from Idaho,Colorado,Wyoming,and Utah were beautiful... Thank you etrailer


I’d seen similar products rated in the 4,000 lb ratings but I went with these. I’m not a mechanic but I removed the factory bump stops and installed both these in 30 minutes or less. I used my rolling jack and lifted from the drop hitch and easily removed the old ones and soapy water and 1/4 twist and these were on. Placed a block of wood in the space between these coils and lowered the jacks then pressed it with my tractor to confirm full engagement. I carry a lot of tools on a 2020 Chevy 2500 I do feel a bit of butt bounce on large bumps but other than that I’m very pleased.


Easy install took about 20 minutes on my 2017 Ram 3500 SRW. Had about 1/2 inch clearance as recommended. Loaded up my 5th wheel (2350 hitch weight) and about 200 lbs of gear in the bed. Just got back from a 800 mile camping trip through mountains of TN. You can really feel the difference around those sharp corners and uneven surfaces. The truck felt firm and controlled not hard and jarring as some have mentioned. Going over those overpasses with the wonderfully smooth (Not) joists was greatly improved. The truck would squat and rebound again, with a firm controlled response. Driving without a load felt the same as before without them. I would highly recommend these! Ordering from etrailer continues to be my go to option!


The Timbren rear bump stops for 2020 Suburban were great quality and fit perfectly in the replacement of the original ones with no problems. The old ones pulled right out by hand with no hassle. When I installed the new ones I put 2x4 blocks that I cut underneath the bump stops. Then hooked up the 6,400 lbs travel trailer with about 750 lbs of tongue weight on it and they pressed right into place. The Suburban was more stable because it had less swaying while towing. I also gained about 1 inche more in the fender gap which means less rearend saging.


This was my second experience with Timbren. This was for my 2010 Dodge Dakota. Great platform without a lot of aftermarket support. Timbren had a set of these designed just for my truck. I installed and it solved the sagging rear end of the truck and swaying when cornering when carrying my pop up slide in camper. This is a n easy install and completely worth the investment.


I don't usually write reviews but in this case I have to. I have been using these springs for about a year now and they work exactly as advertised. I carry a truck camper on my truck from March until November. Once I loaded my camper the truck sagged very noticeably. I tried the Roadmaster Active Suspension (don't waste your money) before I discovered the Timbren springs. The Timben springs installed easily, eliminated the sag and gave the truck a much more stable ride because it eliminated the side to side rocking in the back. If you are thinking about getting these, you will not be disappointed.


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

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

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

I do not tow.


I now have Timbren springs on 3 different trucks. They are one "solution" for tucks that are heavily loaded occasionally. Honestly, I dont like the handling characteristics of any of these trucks when the rear axle is bearing on the Timbren springs. Im not saying that theyre a bad product, and the company is reputable and easy to work with. I prefer a traditional overload spring or something similar to Stable Load overload spring blocks, which engage the overload springs sooner. I just prefer the way a loaded truck handles when it bears weight on a traditional overload leaf spring as opposed to the Timbren.


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


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


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


2 stars for the directions. Directions on how to remove the old stops and install the new ones are horrible. It took me over hours to get the first one done, and about 15 minutes to do the second one. The biggest issue I had was, it comes with a spacer, but the directions says... use what you need (when it comes to the spacer). HOW THE &$%$ am I supposed to know what I need. I used the 1 inch spacer, now the front end sits about 1/2 inch higher... do I remove it?

4 stars for the ride. The truck rides great and I can tell a difference in how smooth it rides, but still don't now if I need to mess up my back (bad back) more to remove the spacer (I have to take the front wheels off to get the SES installed). I might wait until I get the hardware installed for the plow to see if I need to remove the spacers (they might bring it back down where it should be).

I really want to give this a higher rating. Once you discover how to do the install, it takes a few minutes, but the learning curve is sharp.


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


My 2004 Dodge 3/4 ton was squatting in the rear and handled okay with my camper on it, but I thought there was room for improvement. My clearance between the rear axle and frame of the truck was about 3-1/4 inches when loaded, and I could see that the bump stops had been contacting the top of the axle. My clearance when empty is 7-1/2 inches. The kit was shipped quickly and it was time to see if it was "Easy" to install. It WAS easy. Thank you. I decided to put the spacer in to give me Max support in the back with the camper on the truck. This left me less than 1/2 inch space between the axle and new springs when empty. Happy to say my truck rides fine when empty. Did the road test with the camper on and I'm thrilled, no real sway anymore and I have 6-1/4 inches between axle and frame with the 3500 pound camper on the truck. Great product at a great price. I highly recommend this suspension enhancement. Thank you for a great product that solved my nagging problem on curvy roads and high winds. Photos are of new springs next to the bump stops they replace, the installed springs, the springs compressed with the camper on, and finally a picture of my truck sitting really close to level. It would be 4 inches lower in the back with out the new springs.


First of all…I’m a 64 year old woman that is 5’4” tall. I put these on myself in the garage by jacking up the rear bumper to lift the suspension. One or twice a week I hook up a 16’ trailer and put 2 mowers on it that weigh 1100 lbs each. Before I installed these, the chains in the trailer were dragging on the ground even after I wrapped them a couple of times. Now…they are 6-8” off the ground.
This product is wonderful and easy to install. When my truck is not pulling the trailer, it rides much better. I would recommend these to small truck owners if they need a little extra support. By the way, the kit came with 1” spacers that could be installed on each side, but I didn’t see a need for them.


Works great, even with worn-out shocks and springs.


The Timbrens SES (front and back) works very well on my 2913 Ford E350 heavy duty ambulance. No more leaning when turn the corners and it’s not too bouncy. I had a local shop install them cuz I don’t have a big/high jack to raise the vehicle. Highly recommend the Timbrens .

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Suspension Enhancement for RV Built on 2018 Ford E-450 That Provides Small Lift
    The SumoSprings kit part # TGMRC20 that fits your 2018 Ford E-450 will lift the rear of the RV about an inch so it would be the option you are looking for.
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  • Correct Timbren Springs for a 2022 Ford F-150
    The correct Timbren Rear Suspension Enhancement System for a 2022 Ford F-150 is part # TFR1504E. These will do a great job of helping provide extra rear end support while towing or hauling which in turn reduces sag. They feature a simple bolt-on install and there's no maintenance like with air bags. These are also backed by a lifetime warranty.
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  • Correct SumoSprings for 2022 Jayco Greyhawk Prestige with J-Ride
    I do see how the Hellwig Helper Springs in the rear could affect the SumoSprings but I don't think there is anything on the J-Ride that would affect fit on the front with the SumoSprings Solo Custom Helper Springs part # SSF-106-47. The J-Ride is already pretty great so you should not really need to add much more to the suspension but the front SumoSprings would still be a nice addition for the 2022 Jayco Greyhawk Prestige.
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  • Suspension Stabilization For Trailer on '73-'87 Chevy 3/4 Bed Converted to Trailer
    Appreciate the photo, and this is a pretty new one but I think we do have something for you to help out. I showed that photo to some colleagues and it seems pretty likely what you have there is a 1973 - 1987 Chevy C20, which is the 3/4 ton. And the best option to stabilize the suspension would be bump stops, like you said, as they'll work in the same manner as if they were on a passenger truck. There are actually two options for Timbrens that fit a 1973-1987 Chevy C20, depending on if...
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  • Recommended Rear Suspension Enhancement for my 2018 Nissan Frontier
    We have two really good options to improve the ride quality and handling of your 2018 Nissan Frontier. We have what you looked at in the Timbren Rear Suspension Enhancement System part # TTORTUN4L. This is a fixed aeon rubber spring that engages when you put a load on the truck. We do see from time to time them making contact when hitting larger bumps which tends to be pretty abrupt sacrificing a little ride quality. The second option is the Firestone Ride-Rite Air Helper Springs part...
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