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

Timbren Suspension Enhancement System - Rear Axle

Item # TNRTTNB
Retail:$297.00
Our Price: $252.45
You Save: $44.55
Vehicle Suspension

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Product Expert Chris R

Is this right for you? Product Expert Chris R says:

Yes, if you:

  • Your loaded cargo or trailer tongue weight changes often
  • You are wanting the smoothest ride possible
  • If your truck/vehicle is empty more often than it's not

No, if you:

  • You want jounce-style springs known for their strength and durability
  • Your towing or carrying needs are pretty consistent
  • You don't want to worry about checking the springs before each trip
6,000-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 Suspension Enhancement System - Rear Axle part number TNRTTNB can be ordered online at etrailer.com or call 1-833-496-1390 for expert service.
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Timbren Vehicle Suspension - TNRTTNB

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Timbren
  • Extra Heavy Duty

6,000-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.


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 for great performance when you're hauling a heavy load
      • Increases stability
      • Reduces vehicle sag
  • Works independently - side-to-side adjustment
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
  • Includes 2 Aeon hollow rubber springs, custom-fit brackets, and hardware for a simple installation
    • Installs directly onto frame
    • No drilling required


Specs:

  • Load-leveling capacity: 6,000 lbs
    • Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • 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.



NRTTNB Timbren SES with Aeon Hollow Rubber Springs - Rear Axle

Installation Details TNRTTNB Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Suspension Enhancement System - Rear Axle - TNRTTNB

Average Customer Rating:  4.7 out of 5 stars   (4688 Customer Reviews)

6,000-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:
Nissan Titan

This is a great system for keeping the rear end of my 2021 Nissan Titan CC Pro-4x from sagging when carrying heavier loads and the accompanying tongue weight. Towing feels solid, even at 8k lbs+ trailer weight. After a 3" lift, I ordered spacers to make up the difference and it continues to perform well. I would definitely recommend.




by:
2018 Nissan Titan

Timbren operats flawless. About an inch of clearance after installation. Installing these on my 2018 Titan pro4x (non XD) was not a bolt on installation. The hardware provided was not the same that I took out of my truck. I had to tap the nut in the frame starting with a M8-1.25, Then tap using M9-1.25, then finish off using M10-1.5. The bolt provided did not have enough thread on it (timbren was not tight to the frame), so I made an additional 1 inch of thread to the bolt, then everything went together smoothly. Ride is just like factory, until the 1 inch gap closes. I am still happy with the timbrens despite installation.




by:

They are fine when empty or with a heavy load but beat you to death with a light load. If I had to do it over again I would choose airbags for my application.


Comments
The jounce style Timbren springs are made of dense rubber so they can create a rougher ride. I recommend air bags for the 2021 Nissan Titan with part # AL57331
Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle
$412.47
. The Air Lift LoadLifter 5000 springs are designed to adjust the air pressure from 5 psi - 100 psi to adjust for a heavy or light load. An air compressor system part # AL25856
Air Lift Load Controller Compressor System for Air Helper Springs- Heavy Duty - Dual Path
$438.71
makes it more convenient to put air in the bags compared to stopping for air when you want to adjust the air pressure. This system is dual path so you can also adjust each side of the truck bed individually to balance the load. Please keep in mind these air bags are not compatible with a in-bed hitch like a fifth wheel or gooseneck.
-- Etrailer Expert Heather A - 09/08/2021


by:

I haven’t installed yet but what really impressed me was how quick they responded to my order and got it out the door




by:
2018 Nissan Titan

PRODUCT IS GOOD, BUT THE SUPPLIED BOLTS ARE NOT CORRECT FOR MY APPLICATION AS THEY STATED THEY WOULD FIT. HAD TO FIND AND BUY NEW BOLTS. 2018 NISSAN TITAN PLATINUM RESERVE. BEST TO ADD IN THE DIFFERENT SIZED BOLTS IN THE BOX.




by:
Nissan Titan

Installation went good except the bolts sent with were too big to fit into the factory Nissan Titan holes. Used 13mm bolt and worked fine. Overall very pleased.




by:
2019 Nissan Titan

Easy installation. 15 mins total time. Highly recommended if tow anything.




by:

No difference at all, did not help me.




by:

They do what they should do




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by:

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.




by:

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.




by:

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!




by:

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.




by:

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.




by:

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




by:

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




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I haven’t hooked up to the fifth wheel yet or else it might be a 5 star. Based on the 15 minute installation time and the price compared to air bags this appears to be a logical way to go. I will update this as I hook up and put a load on it.




by:

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.




by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I have the timbren enhancement system on my 2020 canyon. I haul a trailer with Ranger that I pull about 250 miles to hunting camp. It tows great!




by:

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).




by:

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




by:

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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See what our Experts say about this Timbren Vehicle Suspension

  • Which Timbren SES System for 2017 Nissan Titan SL
    For your 2017 Nissan Titan SL you will actually need the # TNRTTN and not the # TNRTTNB, which is only designed to fit on the 2017 Nissan Titan Pro-4x. The difference isn't the ride height, but the available mounting spots for on the two trucks are slightly different. This system will install on your rear axle and provide you with a great system to help reduce vehicle sag when towing or carrying heavy payloads.
    view full answer...
  • Timbren Suspension Enhancement Fit for 2020 Nissan Titan With 2-Wheel Drive
    I checked with Timbren for you, and while we do have a fit for a 2020 Nissan Titan with 2-wheel drive, the part # TNRTTNB is only a fit for the 4-wheel drive 2020 Nissan Titan Pro-4X. For your '20 Titan with 2-wheel drive, I confirmed with Timbren that part that fits your truck is the Timbren Rear Suspension Enhancement System # TTORTUN4. There will be no modifying needed, and the Timbrens will do a superb job of improve your Titan's handling and performance by supporting its suspension...
    view full answer...
  • Suspension Enhancement Recommendation for 2017 Nissan Titan 2 Wheel Drive
    For your 2017 Nissan Titan 2 wheel drive we have great suspension enhancement kits available like the RoadActive Suspension Kit part # RAS4611 but we do not have a Timbren kit or air bag kit that fits your truck due to it being 2 wheel drive. All of those fits are for the 4 wheel drive models. The RAS kit I mentioned really is a great option that I know you'll like. It gives you adjustable support like the air bag setups and is also not quite as harsh as some of the Timbren applications....
    view full answer...
  • Comparing Timbren SES to SuperSprings Sumo Spring Solo Custom Helper Springs for 2017 Nissan Titan
    It's not quite a Ford vs Chevy or Nike vs Adidas argument since there are some functional differences between the suspension enhancements available for your 2017 Nissan Titan SL. The Super Springs Sumo Springs Solo Custom Helper Springs # SS95GR and Timbren SES # TNRTTNB are going to provide different levels of support. The Super Springs are going to do a better job of not affecting the unloaded ride quality since they get progressively stiffer as more weight is applied to them, where...
    view full answer...
  • Air Springs or Timbrens for 2014 Nissan Titan Pro-4X With Equal-i-zer Weight Distribution System
    Using the Equal-i-zer Weight Distribution Hitch # EQ37100ET will be a great help to your 2014 Nissan Titan Pro-4X and a suspension enhancement is compatible with these systems. Between air springs and Timbrens the better option is the Timbren Suspension Enhancement System # TNRTTNB. These are designed specifically to fit your 2014 Nissan Titan Pro-4X and since suspension enhancement is only going to come into play on occasion with your weight distribution system, the Timbrens offer the...
    view full answer...
  • Should I Use Timbren Or SumoSprings Suspension Enhancement On My 2020 Nissan Titan Pro-4X?
    You are on the right track in looking for jounce springs, as this will reduce your Titan's rear sag and also improve the overall handling of the truck while reducing body roll. Jounce springs are also very easy to install and require no maintenance, unlike air bags. When deciding between Sumo Springs and Timbren, it really comes down to how much weight you will be adding to the bed of your truck. It sounds like SumoSprings Solo Custom Helper Springs - Rear Axle # SS95GR is the kit for...
    view full answer...
  • Installing Timbren Rear Suspension Springs on a 2021 Nissan Titan With Rough Country Lift
    The Timbren Suspension Enhancement System # TNRTTNB is designed to only fit a stock suspension height on your 2021 Nissan Titan. You can use the Timbren 1" Spacer # A25723-90AH00 to space out the Timbren for the Rough Country lift since they use lift blocks to gain your rear lift and are not using new leaf springs with different characteristics. We also have the Timbren 1/2" Spacer # TA25722-90P00 that can fine tune the height if needed.
    view full answer...
  • Recommended Helper Springs for 2012 Nissan Titan Pro-4X
    I'm really glad you asked because we only have one confirmed fit for the Pro-4x model. It is the Timbren Suspension Enhancement System - Rear Axle # TNRTTNB which is a jounce style enhancement rated for 6,000 lbs load support. It will give you a progressive support as it provides additional support as needed to increase stability while reducing body roll and vehicle sag. It will not change the factory ride when not hauling a load, but will engage as needed for payload and towing.
    view full answer...

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Info for this part was:

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Installed by:
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Employee Jameson C
Expert Research:
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Employee Jacob T
Video Edited:
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Employee Wilson B
Updated by:
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