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  1. Vehicle Suspension
  2. Nissan
  3. Frontier
  4. 2021
  5. Timbren
FITS 2021 Nissan Frontier
Timbren Rear Suspension Enhancement System
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TTORTUN4L
In Stock
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Confirmed to Fit
2021 Nissan Frontier

2 Wheel Drive Models

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Call etrailer.com at 1-800-940-8924 for expert service. We are your Nissan vehicle suspension experts, and offer a great price. etrailer.com carries a complete line of Timbren products for your Nissan Frontier 2021. Timbren Rear Suspension Enhancement System part TTORTUN4L from Timbren can be ordered online at etrailer.com. Complete vehicle suspension installation instructions and technical support.
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2021 Nissan Frontier - Timbren Rear Suspension Enhancement System

  • Bump Stops
  • Towing/Load Leveling
  • Timbren
  • Standard Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only

3,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your Nissan Frontier. 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 when towing or hauling gear
    • 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: 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 when loaded. 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 when loaded or towing because the rubber has more travel.



TORTUN4L - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TTORTUN4L Installation instructions

Ratings & Reviews

4.7

3582 reviews
5 Stars
(2854)
4 Stars
(462)
3 Stars
(115)
2 Stars
(70)
1 Star
(81)
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.

by:

Easy to install. You may need an impact wrench to break loose the u-bolts that have to be loosened.



by:

Fast delivery already installed, great product and great job !



by:

These are the hardest ride you could possibly get loaded or unloaded I would not recomend timbrens to anyone. Had to eat the cost and replace them with air bags. (Aweful product)



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We put theese on all our trucks they work great if you use your truck to carry heavy payloads or pull trailers .



by:

easy to install, Solved my trailer bouncing over bumps problem.



by:

Products arrived timely. They appear to be as advertised. Have not been able to install or use them yet. Great Service!!



by:

Improved stability quite a bit on my Lance 815 Tundra combination.



by:

Just received them just install them looks like they work great etrailer is always right on spot



by:

I received my order within days. It was exactly as I expected. The product works as advertised. I am a now a lifelong customer of etrailer.com.



by:

They worked as advertised. I would buy this product again.



by:

Simple installation and the cost is gre at.



by:

Would be great to have better instructions and car specific.



by:

Worked better than I excepted. I have a old pickup with really tired suspension and this product made it better than new.



by:

I have not fully loaded my Odyssey yet BUT compare to original “pacifiers” which are made from kinda tough popcorn, those timbers are looking reliable.



by:

Fast service just as I ordered



by:

Product looks good. Now if only they came with an installer.



by:

Excellent service yet again, as always thank you Etrailer



by:

So far so good works great, now let's see how long they last?



by:

GREAT PRODUCT!!



by:

Exact fit and fast shipping!



by:

Fast shipping



by:

Easy installation and perfect fit!



by:

Great job. Will use etrailer again.



by:

They should call this Sag-b-gone

Solved
sag issue. On hard bumps when unloaded, you will feel a harsh response but that’s a small
Trade off Get em. Install em. And resume your tows sag free



by:

Amazing service. Followed up by amazing shipping!


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See what our Experts say about this Timbren Vehicle Suspension

  • Recommended Timbren Rear Suspension Enhancement For A 2019 Toyota Tacoma With 4WD
    Suspension enhancement systems like Timbren springs are perfect for the scenaro you're describing. These solutions supplement your factory suspension but don't necessarily increase your capacity. Timbrens are hollow rubber springs that sit above the rear axle to help stabilize and level your Toyota Tacoma. Below are what I recommend of the available spring choices. For off road applications, I recommend the Timbren Active Off-Road Bumpstops # TABSOSR for vehicles if the axles are...
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  • Comparing Jounce-Style and Air Bag Enhancements for Off-Road Camping in a 2010 Toyota Tacoma
    Hey Paul, thanks for reaching out again! Looking into suspension enhancements can be exhausting and overwhelming, especially when you've found a solution that works for you but it seems like there is a better alternative out there. You've stumbled upon the exact dilemma that faces everyone wanting to upgrade from jounce-style to air bag enhancement and there's nothing wrong with your thinking - or with either solution. The jounce-style you currently use are designed to be more cost-effective...
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  • Suspension Enhancements for a 2017 Toyota Tacoma with Firestone Airbags
    I do have a suspension enhancement option for your 2017 Toyota Tacoma that is compatible with the Firestone Ride-Rite Air Helper Springs part # F2407, however, the Timbren Rear Suspension Enhancement System part # TTORTUN4L and the Roadmaster Active Suspension Kit part # RAS4514-SAT will not work. In order to use a set of suspension enhancements with your currently installed Firestone Ride-Rite Air Helper Springs, I recommend the TorkLift StableLoad Rear Suspension Upgrade part # TLA7311...
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  • Timbren SES for 2021 Nissan Frontier Hauling Commercial Mower and Towing Utility Trailer
    Hello again Ed! You probably ended up outside our fitguide with some of the Timbren the parts you were looking at. The Timbren SES severe service kit is designed for constant loads like a truck bed camper or salt spreader. Regardless, a severe service kit is not available for the Frontier. The highest rated Timbren SES for your truck is the # TTORTUN4L which has a 3,000 lb capacity. You may have also seen the # T63AV which lists a 4,800 lb capacity but that is only the bump load, the...
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  • Installation Instructions for Timbren Suspension System on a 2012 Nissan Frontier Pro4X 4x4 Off Road
    To install the Timbren Rear Suspension Enhancement System, # TTORTUN4L, on your 2012 Nissan Frontier Pro4x 4x4 you will need to safely raise the vehicle to allow the axle to hang freely, then loosen the axle u-bolts and remove the OEM rubber bump stop. Next, install the lower bracket from the Timbren kit where the OEM bump stop was. Finally, tighten the U-bolts and safely lower the vehicle. I have attached installation instructions for you to review.
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  • How Much Space Between Leaf Spring And Frame For Timbren SES on 2011 Nissan Frontier
    Timbren recommends a 1" gap when the Timbren Rear Suspension Enhancement System # TTORTUN4L is installed. The overall height of this kit is 4.6" so the distance between your leaf spring and the point of contact where the old bump stop hits should be 5.6". It doesn't have to be perfect, but the greater the gap the longer it will take to engage. It is possible to add spacers to close the distance using the 1/2" # TA25722-90P00 and 1" # A25723-90AH00. Adding spacers will require longer bolts...
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  • Recommended Timbrens and Heights for a 2015 Toyota Tacoma w/ a 4 Leaf Spring Pack
    Hey Josh. The Timbren Rear Suspension Enhancement System item # TTORTUN4L has an overall height of 4.6" including the bracket. Timbren recommends a 1" gap between the spring and where the old bump stop hits. The Timbren item # TTORTUN4L is designed for the 2015 Toyota Tacoma with 3 leaf pack springs in the rear suspension. The Timbren item # TTORTUN4 you mentioned have an overall height of 5" so I completely agree with you. Do you tow with your Tacoma? If not why are you wanting to...
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  • Height Of Timbren Springs and Vertical Wheel Travel Loss In 2019 Toyota Tacoma
    When installing any Timbren system on the 2019 Toyota Tacoma you should have about 1/2" to 1-1/2" between the frame and the spring after installation. You won't necessarily be losing wheel travel when you use a Timbren Rear Suspension Enhancement System on the Tacoma. I recommend either the # TTORTUN4 system if you have 4 leaf springs in the rear suspension or # TTORTUN4L if you have 3 leaf springs in the rear suspension. When you switch out the factory bump stops for the Timbren springs...
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  • Will The Air Lift Air Bag Helper Springs # AL39DQ Fit a 2023 Nissan Frontier SV 4X4?
    The Air Lift LoadLifter 5000 Air Helper Springs # AL39DQ are confirmed by Air Lift to fit your 2023 Nissan Frontier SV 4x4. We currently do not have an installation video for this system as we only just began to carry the springs a few months ago(June 2023) and have not had any vehicles in for this installation. These are going to be far superior to the Timbren # TTORTUN4L for helping to keep your Frontier level. The Timbren creates a 1" gap for your suspension so they will not engage until...
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  • Height of the Rubber Spring of the Timbren kit part # TTORTUN4 and # TORTUN4L
    I went out and pulled both the Timbren kit part # TTORTUN4 and # TTORTUN4L from our warehouse to measure them for you and found that they both sit exactly 3-3/4 inches tall.
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  • Will RoadActive Suspension For 2019 Toyota Tacoma Give Smoother Ride Than Timbrens
    That's a good question, and the answer is pretty straightforward - yes, the RoadActive Suspension (RAS) is going to give you a smoother, less bumpy ride than the Timbrens for your 2019 Toyota Tacoma. Like you mentioned, the Timbrens do their job well due to the stiffness of their rubber springs, but that stiffness can also cause the ride to be uncomfortable or even jarring as there isn't much give to them. The RAS will absolutely remedy that while providing the same - or better - enhancement...
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  • Overall Height of Timbren Suspension Enhancement Springs # TTORTUN4 for a 2010 Toyota Tacoma
    I went out to the warehouse and actually pulled 2 possible fits for your 2010 Toyota Tacoma. First, for Timbren springs # TTORTUN4, the overall height from the bottom of the bracket to the top of the spring is approximately 5 inches. The other kit I pulled was # TTORTUN4L. This kit is a bit shorter at 4-1/2 to 4-5/8 inches tall overall. I have included links to hte isntructions for both kits as well as a link to our FAQ article on Timbren systems for you.
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  • Comparing Timbren Suspension Enhancement for 2018 Toyota Tacoma
    There are six different Timbren kits for suspension enhancement that all fit your 2018 Toyota Tacoma. Four are for the rear and two are for the front. Of the front two, part # TTOFTUN4 is designed for adding support when you put a snow plow on the truck and # TABSTOF is an active bump stop that cushions the shock when off-roading. A couple of the rear kits are designed to support the rear of the truck when either towing a trailer or adding weight in the bed. Use part # TTORTUN4 if your...
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  • Comparing the Timbren Suspension Systems TTORTUN4L and TORTUN4 for 2019 Toyota Tacoma
    The correct Timbren Rear Suspension Enhancement System for a 2019 Toyota Tacoma is part # TTORTUN4L if you have three leaves in the rear leaf spring pack or part # TTORTUN4 if you have four leaves in the rear leaf spring pack. Therefore, the main difference is in regards to fit. The Timbrens are going to do an excellent job of helping to reduce rear end sag/squat while loaded or towing. They also won't affect the unloaded ride quality and they are easy to install which makes them the perfect...
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  • Fit & Height of Timbren Suspension Enhancement on 2019 Toyota Tacoma 4WD
    I reached out to Timbren, who told me the the actual jounce springs are both the same height at 3-3/4 inches, but the bracket height is different. So there aren't shorter springs, and the correct fit for your 2019 Toyota Tacoma 4WD is going to depend on the number of OEM leaf springs your Tacoma has. - 3 Leaf Springs: Timbren Rear Suspension Enhancement System # TTORTUN4L - 4 Leaf Springs: Timbren Rear Suspension Enhancement System # TTORTUN4 So it is possible that you may have the kit...
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    I will first start out by addressing the additional transmission cooler you will want to help keep the transmission fluid temperatures at a safe level, while towing a 5,000 lb. trailer with your 2011 Nissan Frontier. As you mentioned, your Frontier is plenty capable of hauling this load, however, it is never a bad idea to aid your factory transmission cooler with an even larger one for optimal performance. I recommend looking at the Derale Series 8000 Plate-Fin Transmission Cooler Kit...
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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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  • Solution for Rear Sag on Nissan Frontier with Travel Trailer Hooked Up
    We do have a nice selection of suspension enhancement products available for your 2015 Nissan Frontier, such as the TorkLift StableLoad Rear Suspension Upgrade # TLA7311 that you mentioned, however I'm not sure that any of them will provide you much more support than you are already getting with the Timbren Springs like # TTORTUN4L installed. Even though you said that you aren't really having any issues with sway or bounce, the best solution for the rear sag you are experiencing is with...
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  • What Rear Suspension Enhancement do You Recommend for My 2021 Nissan Frontier?
    I have a great rear suspension enhancement solution for you. I checked in with both our air bag manufacturers (Air Lift and Firestone), and they currently do not have an air bag system designed to fit your rear axles of your 2022 Nissan Frontier. The Firestone Ride-Rites # F2558 are not engineered to fit your 2022 model. However, we do have a great Timbren option that will give you extra support on your rear of your vehicle. For that route, I recommend the Timbren Rear Suspension Enhancement...
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  • Recommended Timbren Suspension Enhancements for a 2017 Toyota Tacoma with 4 Leaf Springs
    The Timbren Rear Suspension Enhancement System part # TTORTUN4L is designed to work with the 3 leaf setup on a 2017 Toyota Tacoma, but not the 4 leaf setup. For a 4 leaf setup you would need to use the Timbren Rear Suspension Enhancement System part # TTORTUN4. The jounce spring kit designed to work with 4 leaf spring models has a shorter mounting brackets to allow for the recommended 1/2" - 1" of space between the bump stop and rear axle. Although both jounce springs are the same, you...
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  • What Rear Suspension Enhancement do You Recommend for My 2022 Nissan Frontier Pro?
    I have a great rear suspension enhancement solution for you. I checked in with both our air bag manufacturers (Air Lift and Firestone), and they currently do not have an air bag system designed to fit your rear axles of your 2022 Nissan Frontier Pro. However, we do have a great Timbren option that will give you extra support on your rear of your vehicle. For that route, I recommend the Timbren Rear Suspension Enhancement System # TTORTUN4L. Not only will this work with your Pro model...
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  • Best Suspension Enhancement for a 2018 Nissan Frontier with Factory Ride Quality
    In regards to suspension enhancements for a 2018 Nissan Frontier, you have a few options but there are none from SuperSprings. The best option for unloaded ride quality would be the Firestone Ride-Rite Air Helper Springs part # F2558. However, if you don't want the maintenance upkeep of the airbags then the Timbren Rear Suspension Enhancement System part # TTORTUN4L are a great second best option. They can engage if you go over a big bump but aside from this they will retain a mostly factory...
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  • Timbren Rear Suspension Enhancement Recommendation for a 2016 Toyota Tacoma
    I checked with Timbren and for your 2016 Toyota Tacoma they recommend the part # TTORTUN4L as a confirmed fit and not the # TTORTUN4. I attached a review video for you to check out as well.
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  • Axle U Bolt Torque Recommendation for a 2020 Toyota Tacoma for Timbren Install
    When installing Timbren suspension enhancement kits like the # TTORTUN4L, U-bolt and the straight bolt attaching the spring to the bracket doesn't have a specific torque rating as they're usually 'torqued to yield' meaning they're torqued down until they begin to deflect. I did contact Timbren who confirmed this. Included are additional video resources regarding this solution.
    view full answer...


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