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Timbren

Timbren Rear Suspension Enhancement System

Part Number: TNRTTN

7294 Reviews | 15 Questions

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$269.36

Retail:$316.90

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2003 GMC Sierra

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SCHEDULE AN INSTALLATION

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 Rear Suspension Enhancement System part number TNRTTN can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.

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Timbren Vehicle Suspension - TNRTTN

Highlights

Custom Fit for Your Vehicle: Mounts to existing attachment points
6,000-lb Load Support: Keeps your truck level and stable when towing or hauling heavy gear.
Smoother, Safer Ride: Hollow rubber springs absorb road shock and reduce bounce on rough roads.
Better Steering and Braking: Prevents rear sag so handling and control stay consistent under load.
Handles Off-Center Loads: Each spring works independently to reduce roll and sway in turns.
No-Drill DIY Setup: Bolts to existing bump stop mounts with vehicle-specific brackets and hardware.

Features to know about

Stay Level and Confident Under Load: 6,000-lb Rear Suspension Support

Heavy trailers and bed loads can make the rear of your truck sag and throw off handling. The Timbren Rear Suspension Enhancement System adds up to 6,000 lbs of load support to keep your ride level when towing or hauling gear. The hollow Aeon rubber springs mount above the rear axle, working with your factory suspension to maintain a stable ride height and better steering and braking no matter how much weight is in back.

Truck bed loaded with heavy cargo showing rear axle sag before installing Timbren Rear Suspension Enhancement System

Smooth Ride When Empty, Firm Support When Loaded: Progressive Rubber Springs

These hollow rubber springs stay clear of the axle under light loads, so your truck rides just like stock when empty. As you add weight, the convoluted design compresses progressively—soft at first, then more rigid as the load increases. That means smooth comfort on daily drives and firm support when towing or carrying heavy cargo.

Keep Control Through Corners and Crosswinds: Independent Spring Action

Each spring works on its own to support the driver or passenger side as needed. That independent action keeps your vehicle steady when making sharp turns or hauling uneven loads. It also helps reduce body roll and trailer sway, so highway gusts or a passing semi don’t push you around.

Timbren suspension system reducing body roll and squat to improve vehicle stability during cornering and uneven loads

Towing setup showing trailer sway reduction with Timbren Rear Suspension Enhancement System for improved towing stability

Built Simple and Tough: No Air Lines, No Adjustments

The system bolts to existing frame points in place of factory bump stops—no drilling, air hoses, compressors, or manual adjustments required. The durable rubber design absorbs road shock and prevents bottoming out on rough roads while extending the life of your suspension components. It’s a straightforward setup that’s made to last and ready for real work.

Empty pickup truck on a rough road illustrating how Timbren suspension absorbs shocks and prevents bottoming out

Specs

Weight and Capacity

Capacity: 6,000 lbs

Included Components

Includes: 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation

Installation

Replaces: axle bump stops on frame
Drilling Required: No drilling required

Compatibility

Designed to work with: a suspension system that is in good working order

Warranty

Warranty: Limited lifetime warranty - satisfaction guarantee

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

Installation Details TNRTTN Installation instructions

This Product Fits The Following Vehicles

2017 - 2024 Nissan Titan 2 Wheel Drive
2004 - 2024 Nissan Titan 4 Wheel Drive

Customer Satisfaction Score:

90% were satisfied with this product

10% of customers were not satisfied

Arrived Damaged
Wrong item was ordered

10% of customers were not satisfied

Arrived Damaged
Wrong item was ordered

4.7

7294 reviews

5 Stars		(5873)
4 Stars		(882)
3 Stars		(207)
2 Stars		(135)
1 Star		(197)

by: Steven 06/25/2025 One Year Later

Ordering and shipping great. Good value. Installation simple although I did have experienced help. I tow a 30' TT, approx 6500#, with a Titan. The Timbrens have helped with sway control. Recommended.

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Gwendolyn Y.

7/1/2025

That's great to hear, Steven! Are you heading out for the holiday weekend with your TT?

by: Andrew D 07/31/2020

2019 Nissan Titan

Very easy to install even though the istructions haven't been updated to the '17-'19 model year Titans. You have to remove the bump stop that is mounted to the top (instructions show it mounted to the leaf spring). To install the bump stops simply pull out, then you remove the mounting plate with a 1/2" socket, then follow the included instructions.

I bought this to help my pickup sit more level and to help provide a little extra lateral stability in crosswinds when towing my travel trailer. It certainly helps with being more level, but I haven't towed in the wind yet to see if it helps in that area. I measured the top of the tire to the fender and it is 5.5" in the front, 5.25" in the rear with the travel trailer fully loaded and ready for camping.

I gave this four stars because it looked like it was used when it showed up. It doesn't have to be pretty, but I really don't like buying new items and receiving used ones.

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by: James 03/13/2023

2004 Nissan Titan

So far soo good. Very easy to install on my 04 Nissan Titan. Took a little over two hours total to assemble all the tools lift the truck, set up my pneumatic tools, remove old bumppad and install new spring helpers. Hauled my first load of 2700 pounds of gravel. Much improved ride and vehicle control compared with stock suspension. Also rear end was atleast 3 inches higher than stock

James One Year Later

3/14/2024

Still works great when hauling a load. Unloaded, ride is very firm but to be expected

by: GH 11/07/2020 One Year Later

I installed the timbren rear suspension system... I have been very happy with the product and would encourage anyone looking to enhance tow capacity of a truck to use this system

Jon G.

11/11/2020

Glad to hear that you are happy with your Timbren suspension kit! Please just keep in mind that while this kit does enhance your vehicle suspension, it will not increase the actual weight capacity of your vehicle. This is the same among all of the suspension enhancement products.

by: Dave B 09/25/2019 One Year Later

The Timbren Aeon Spring System Vehicle Suspension was easy to install on my 2005 Nissan Titan. The only problem I have is that the, per the Timbren instructions, your load is only taken on by the Tembren (rubbers) after the load on your vehicle's leaf springs depressing allows contact with rubbers. Only on my truck the it's the opposite. I'm riding on the rubbers without any extra weight in my bed, causing a very uncomportable ride, and a lot of unnecessary bouncing around. It's great when I'm pulling my 26' travel trailer, or my fully loaded 16' wood hauling utility trailer. They also make the back of my tailgate higher, making it harder to load and unload. After I bring my travel trailer down from my hunting camp the Timbren rubbers are coming off.

by: Corey W. 08/19/2012

2007 Nissan Titan

installed on my Nissan Titan, especially on rough roads! Timbren should have used a much softer rubber spring for this application. I chose to remove these after only one week because I could not tolerate the ride. Unfortunately I didn't experience this product under a loaded condition when pulling my travel trailer. I am going to try the Firestone Workrite product next (I hope it is better), sine I want to stick with an airless helper spring system.

by: Carlos 07/16/2014

Put a set on my Dodge and now I have them on my Nissan.

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by: Andrew 04/26/2018

2004 Nissan Titan

This is the second truck that I own which I have them on. I have them on my Ford diesel truck which I pull a 12000 lb 5th wheel, and now my nissan truck for pulling my boat and 4 wheeled. These are a great cheap investment which I recommend.

Andrew One Year Later

4/28/2019

Absolutely would recommend these springs. I have recommended them to others who have also purchased them. They also are sold.

by: Terry B. 12/02/2011

2011 Nissan Titan

Titan.

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by: Andrew Novak 05/10/2022 One Year Later

No complaints! Does a great job of keeping my Nissan Titan level when pulling my car hauler or camper. Install was very simple

Andrew N.

2/20/2024

that's great to hear!

by: Logan 02/25/2022 One Year Later

2006 Chevrolet Colorado

Threw these on my 06 Nissan Titan. Towed a 5th wheel from Colorado to New Jersy and back. The drive felt great with these on.

by: Gary 09/14/2024

Everything was good until I found the bolt did not have the six sided head formed on it.(see attached) It took longer(45 mins) to get a replacement bolt at Ace Hardware than it was to install. Oops Timbren a fail. Gary

by: John Mayer 01/31/2023

Very satisfied! Easy to install and use on my Nissan Titan. I didn’t even need to remove the wheel to install it. Now my truck does not squat when pulling a trailer or carrying heavy load.

by: Ronald 05/02/2024

Awesome. Easy to install. Much better than OEM bump stop.

by: Richard 06/28/2023

2007 Nissan Titan

I would love to give a review on your product. If there WAS a product in the box that was delivered to my house. How can a business send an empty box to a customer instead of the product that was ordered?

Jenny N.

6/29/2023

Oh my goodness! I am not sure what happened there however I will have our Customer Service team reach out to you. We can have a replacement sent out.

by: Michael B. 08/25/2017 One Year Later

2005 Nissan Titan

I put them on a 2005 Nissan Titan. We up graded tires to LTs and dropped 25 hundred pounds of salt and the truck sat level. Very pleased with them

by: Cody 09/08/2022 One Year Later

It's been a great product. Helping with towing greatly.

by: Don 05/03/2013

2010 Nissan Titan

Easy to install, makes the truck ride like a 1 ton though.

by: Phillip 10/25/2020

2012 Nissan Titan

Great product for your towing needs. I added these to my 2012 Nissan Titan SV. Easy install and could feel a difference in support.

by: Duane 05/08/2018

2008 Nissan Titan

Easy install fast service

by: Kevin 12/22/2020

2017 Nissan Titan

Smooth

by: Harold 08/03/2022

by: Susan 07/26/2023

by: Jim - On a ranch near San Antonio 09/20/2026

Installed the Timbren TFR250SDJ on my 2025 F-250 Platinum Plus 4WD Short Bed with 6.7 HO Powerstroke. Fit perfectly. It takes a few minutes to get the bags attached to the base. It seems like the bolt is too long but I used a vise to hold the unit while I tightened it down more and cinched the bag to the base. So if it seems it wont get tight enough and is still loose, find a way to secure the base... there's still a few more turns.

Attaching to the truck takes a few minutes to remove the OEM (2 nuts) and a few minutes to install the Timbren SES. I added about 45 minutes by dropping one of the nuts, which I finally found inside the shock absorber bracket!!

I used a hand socket but would recommend air or power tools, if you can get to the nuts, but it can be done manually. Probably took me a few extra minutes with a socket wrench because of limited space, and I'm old!

I have not tested the SES under load yet, but I was really more concerned with the ride unloaded.I ended up with a gap right at 1" between the peg and bottom of the SES. Some reviews said the unloaded ride worsened. So I drove to the nearest small town with horrible streets, bumps, holes, broken concrete, sewer covers 3" below the asphalt, etc. On the highway, the ride was perfect, completely unaffected. On my bad road obstacle course, I thought the ride improved significantly. So I think the system will give a better ride unloaded. It was a little stiffer, less roll, and smoother. It was not "bouncy" or jarring, like some reviews mention. Very smooth and felt beefier on bad roads.

I'll update after I've driven loaded. I tow a 12,000# 2025 Rockwood TT 36' with a ProPride 3P hitch. We put 7,000 miles on it across 15 states this past year, so I've definitely got a "before" baseline using the OEM bumpers.

The ordering process was great. Naomi D had great product knowledge. At first I thought I was talking to my granddaughter, but after putting her through the paces, It felt like I was getting sage advice from my Grandfather. e-Trailer seems to really invest in their customer service reps knowledge base. Also completely satisfied with the order process and delivery. They were able to mail to our PO Box, which seems to be a problem for most (our physical address is a gate on the side of a highway, with cows on the other side).

100% satisfied so far and would recommend both e-trailer and Timbren to a friend. Will update once I've done some towing, but can say the unloaded ride is unaffected or improved for my application. So far, very happy.

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Robin H.

9/22/2026

Thanks for taking the time to share such a detailed review and all of the pictures! The unloaded ride is a concern we hear fairly often with SES upgrades, so your experience with the 1" gap and rough-road testing will be really helpful to others considering these for their F-250. We appreciate the kind words about Naomi and our team as well. Looking forward to your update once you get some miles on them with the Rockwood!

by: Adam 08/12/2026

I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!

Click to Enlarge

Christopher H.

8/14/2026

Love hearing this! Really appreciate the detailed feedback and photos. That extra stability when you're loaded up can make a huge difference. And installing them at 11 at night—that's commitment. Hope they treat you just as well on those mountain roads. Safe travels and we'll definitely make sure Dee Dee gets the shoutout.

Adam R.

8/14/2026

@ChristopherH Dee Dee was great. Tell her I owe her a coffee!????

7294

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See what our Experts say about this Timbren Vehicle Suspension

Do you have a question about this Vehicle Suspension?

Comparing The Timbren # TNRTTNB And # TNRTTN For A 2024 Nissan Titan SV
Hey Mitchell, The Timbren Suspension Enhancement System # TNRTTNB is designed specifically for Pro 4x models so it wouldn't be the right fit for your SV. Both the # TNRTTNB and # TNRTTN (which would be a fit for your SV) have 5" tall springs. The # TNRTTNB uses HCS M8 x 50 x 1.25 Grade 8.8 zinc coated bolts and the # TNRTTN uses HCS M10 x 40 x 1.5 Grade 8.8 zinc coated bolts. These both have a 6,000lb capacity and will make a significant difference to your unloaded ride quality. I personally...
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Recommended Timbren Suspension Enhancement System for 2010 Nissan Titan
Since you are towing a travel trailer, you are going to want to use a Timbren system that enhances your rear suspension. Should your 2010 Nissan Titan be a 4 wheel drive model you would want # TNRTTN, and for 2 wheel drive models you'd want # TTORTUN4. This system is going to level out your ride and help reduce sag when hauling heavier loads. They install without requiring drilling and replace your axle's bump stops. I've included a photo showing what a Timbren looks like installed on...
view full answer...
Will Timbren Suspension Enhancement System Increase Payload of 2012 Nissan Titan Pro 4X?
Adding suspension enhancement like the Timbren # TNRTTN you referenced does substantially help with load support and reducing sag, however it does not increase the payload capacity of your truck. Your 2012 Nissan Titan Pro 4X will have the same 1850 lbs of payload but the system will assist with stability by reducing squat, reducing body roll, and assisting with shock absorption. It will assist far better than adding a leaf spring as that will change the ride of your truck when not...
view full answer...
Does Timbren for 2019 Nissan Titan Install On Bump Stop Bracket or Leaf Spring
The Timbren install pictures you saw might have been from a different vehicle as the # TNRTTN that you referenced installs by attaching to the bottom of the bump stop bracket that you found.
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Towing Fifth Wheel Trailer With 2006 Nissan Titan
From what you describe, your trailer isn't very heavy. Pin weight can range from 15-20 percent of the trailer weight, or up to 25 percent for some larger toy haulers. Worst case scenario, you're looking at about 1500 lbs or so of pin weight which is pretty minimal. To determine the towing capacity of your truck, take a look at the sticker on the driver's door jamb. Look for the GCWR, the gross combined weight rating. This represents the maximum amount the trailer and truck can weigh....
view full answer...
Is There A Spacer Available For A SumoSprings Solo Helper Spring On A 2019 Nissan Titan
As you mentioned your 2019 Nissan Titan being a work truck there will be another option, but there is no spacer available for the SumoSprings Solo Custom Helper Springs # SS95GR, unfortunately. With that said, as the # SS95GR is rated to 1,500 pounds of capacity, you may want to go with a higher rated product, like the Timbren Rear Suspension Enhancement System # TNRTTN. This will have a 6,000 pound capacity and will do a better job for getting rid of the sag, but I do have to mention...
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Is the 1/2" Spacer # TA25722-90P00 Compatible with the Timbren # TNRTTN on a 2017 Nissan Titan
Yes, the Timbren 1/2" Spacer # TA25722-90P00 is compatible with the Timbren Rear Suspension Enhancement System # TNRTTN for your 2017 Nissan Titan. Please note that per the linked instructions for the suspension kit Timbren says that there should be a 1/2" - 1-1/2" gap between the rubber spring and contact point when there is no load in the vehicle. If you installed this kit and you have 1/2" of space then you actually won't need the spacer.
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Will Timbren Kit for 2017 Nissan Titan Provide Support Even with Weight Distribution
The Timbren kit part # TNRTTN is a confirmed fit for your 2017 Nissan Titan and is going to provide you with additional suspension support when towing. Typically you don't need a kit like this if you already have weight distribution but if you are near the capacity of the truck additional suspension support will help so this would be a solid choice for you.
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Suspension Enhancement Recommendation for 2006 Nissan Titan That Will fit with 5th Wheel Rails
It looks like the Firestone kit part # F2355 could fit on your vehicle with fifth wheel rails # C16470-204, but since it hasn't been tested we really can't say for certain. The safe bet would be the Timbrens that we know will fit. Such as the Timbren kit # TTORTUN4 for 2-wheel-drive Titans (or part # TNRTTN for 4-wheel drive models). Since these springs install in place of the OEM axle bump stops there is no conflict with 5th wheel mounting hardware. Also, since these springs do not...
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Recommendation for a Rear Suspension Enhancement for a 2004 Nissan Titan Pickup
I have a solution that is the confirmed fit for your 2004 Nissan Titan. Unfortunately, the Air Lift AirCell Helper Springs that you asked about will not fit a 2004 Nissan Titan. These helper springs will only fit full-size Ford pickups. For your Nissan, I recommend the Timbren Rear Enhancement System, # TTORTUN4 for 2-wheel dive or # TNRTTN for the 4-wheel drive model Titan. The Timbren system will improve the suspension and handling of your loaded Nissan Titan. The Aeon rubber springs...
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Can Timbren Suspension Enhancement Be Used With Weight Distribution System On 2005 Nissan Titan
You can use a Timbren Rear Suspension Enhancement System, part # TNRTTN on your 2005 Titan with a weight distribution system. The Timbren system is designed to help increase stability and reduce sag when weight is added to the back of a truck. I would recommend adjusting the weight distribution system after installing the Timbren system to make sure it is set up correctly for your camper and any of the load you put in the bed of your truck. The Timbren system will not affect the ride...
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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.
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Rear Suspension Enhancement Recommendation for 2010 Nissan Titan with 1 inch Lift
A shackle lift is considered a suspension lift since it raises the frame of the vehicle away from the axle. So you would need lift spacers to use a suspension enhancement kit. I have a very similar solution, but the Work Rite kits don't have lift spacers available. You would want the very similar Timbren part # TNRTTN and then the 1 inch lift spacer # A25723-90AH00 and you would be set.
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Do Firestone Ride-Rite Rear Air Springs, Part # F2355, Fit 2010 Nissan Titan with a 5th Wheel Hitch
My contact at Firestone does not have a confirmed fit for this air spring kit, part # F2355, on the 2010 Nissan Titan when it is equipped with the mounting hardware for a 5th wheel. This does not necessarily mean there will be a fit issue, only that the combination is untested. The compatibility of this air spring kit with your 5th-wheel-equipped Titan will be a function of the type of base rail installation kit you have and where on the vehicle frame that hardware is mounted. If it mounts...
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Will the Timberens part # TNRTTN Work on my 2018 Nissan Titan with an Equalizer Weight Distribution
Great news! The Timbren Rear Suspension Enhancement System part # TNRTTN will work out great with your 2018 Nissan Titan and will work perfectly in conjunction with your weight distribution system.. With your equalizer system as part of the equation I recommend after installing the Timbrens that you re check the system per the instructions to ensure that the system is still optimized and does not need fine tuning.
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