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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Standard Duty
THIS ITEM IS NOT A FIT FOR
1998 Nissan Maxima
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Timbren

Timbren Suspension Enhancement System - Rear Axle

Part Number: TFR150RB
In Stock
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Not Confirmed to Fit

1998 Nissan Maxima

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2,400-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 TFR150RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFR150RB

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 2,400-lb Load Support: Keeps your truck level and steady when towing or hauling heavy gear.
  • Better Ride Comfort: Hollow rubber springs absorb road shock for a smoother, more stable drive.
  • Less Sag and Roll: Progressive design stiffens under weight to cut body roll and rear-end squat.
  • Handles Off-Center Loads: Each side works independently to balance uneven cargo or turns.
  • Simple, No-Drill Install: Bolts directly to the frame with custom brackets and included hardware.

Features to know about

Stay Level Under Heavy Loads: 2,400-lb Rear Axle Support

When you’re hauling a heavy load or towing a trailer, rear-end sag throws off handling and headlight aim. The Timbren Suspension Enhancement System adds up to 2,400 lbs of load-leveling support to keep your vehicle level and steady. Its hollow rubber springs work with your factory suspension to reduce squat and maintain control under load—no air lines, compressors, or adjustments needed.

Truck bed loaded with cargo showing rear sag caused by weight before using Timbren Suspension Enhancement System.

Smooth Over Rough Roads: Progressive Hollow Rubber Springs

Rough pavement and potholes can beat up your suspension. Timbren’s Aeon hollow rubber springs absorb road shock and cushion bumps so you get a smoother, more stable ride when loaded. The progressive spring rate means they stay soft when lightly loaded and get firmer as weight increases, taking the brunt of impacts before they reach the frame or cargo.

Pickup truck driving on rough road demonstrating shock absorption provided by Timbren rubber suspension springs.

Animation showing compressed Timbren hollow rubber spring demonstrating progressive suspension resistance under load.

Diagram showing Timbren suspension spring installed above rear axle with clearance when unloaded and compression when loaded.

Stay Steady in Crosswinds and Turns: Independent Spring Action

Heavy loads or off-center cargo can make your truck lean through corners or sway on the highway. Each Timbren spring works independently to keep your vehicle balanced side to side. This design helps cut down on body roll when turning or swerving and keeps trailer sway from transferring back into the vehicle for better control on the open road.

Diagram showing how Timbren suspension system reduces body roll and sway when cornering or carrying uneven loads.

Towing vehicle with trailer beginning to sway illustrating stability improvement from Timbren Suspension Enhancement System.

Install It Once and Get to Work: No-Drill Brackets and Hardware

Adding rear support doesn’t need to be complicated. The Timbren system bolts directly onto the frame using custom-fit brackets, spacers, and included hardware—no drilling required. Once mounted, the springs automatically engage as the load increases, giving you reliable suspension support without any manual setup or maintenance.

Specs

Weight and Capacity

  • Load-leveling capacity: 2,400 lbs

Warranty

  • Lifetime warranty
  • Satisfaction guarantee

Note

  • Important: Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.

FR150RB Timbren SES with Aeon Hollow Rubber Springs - Rear Axle

Installation Details TFR150RB Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

7302 reviews
5 Stars
(5878)
4 Stars
(885)
3 Stars
(207)
2 Stars
(135)
1 Star
(197)
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by:
The last two things I bought from E-trailer looked like they were used. This one at least had all of the fasteners, although they didn’t seem to be the ones in the directions. These had Allen heads and I had to buy a socket that had an Allen key. The directions included aren’t very clear. I had to find some YouTube videos to make sense of the install unloaded I can’t tell any difference, which is great. Hoping this fixes my backend squat with the boat trailer attached which is so severe I can’t flip down the trailer jack. Fingers crossed. Get a jack under the hitch and really unload the axle from the frame. Once I got enough clearance it was truly a 30 minute job.
by:
Hey Katherine good morning from Puerto Rico, hope you are doing well.

Im sending this email just to let you know that i was very pleased with the service you provided me by phone explaining what was the correct part i needed for my ford f150 raptor 2017. You also helped me order and purchase the part by phone, thanks again.

I received the part yesterday and I installed it myself in a very easy way, and the part worked perfectly. I could load 270 gallons of diesel on my pickup efficiently without hurting the suspension of my raptor and the ride quality was upgraded in a very significant way.

Thanks again Katherine and etrailer.
by:
Great product. Have towed multiple trailers and loads. Same ride when empty. Ride still good when fully loaded. Would by again. And recommend
Philip profile picture

Philip

12/9/2022

Great,

by:
Worst investment ever!!!! The suspension doesn’t sit in the bottom at all and it will slide right off the frame for anything over 1000lbs leaving it basically with no support. Save your money and buy air lift bags instead!
by:
2019 Ford F-150 Raptor
The product is nice once it finally arrived. Item was only in USPS hands for a few days. Took etrailer over two weeks to even ship it out!!
by:
Phil S. profile picture

Phil S.

8/21/2021

Simple, easy install, works great.

by:
Easy to install and works well.
by:
by:
by:
2019 Ford F-150 Raptor
by:
by:
2017 Ford F-150 Raptor
by:
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!!
Christopher H. profile picture
Etrailer Expert

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. profile picture

Adam R.

8/14/2026

@ChristopherH Dee Dee was great. Tell her I owe her a coffee!????
by:
2024 Toyota Tundra
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
Lazer S. profile picture
Etrailer Expert

Lazer S.

8/19/2026

Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?

by:
2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.
Jay S. profile picture

Jay S.

8/14/2026

Now that its been a year Im very impressed with them. Theres no ride detriment without the 5th wheel attached and they do a great job of mitigating squat

by:
Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.
Brooke M. profile picture
Etrailer Expert

Brooke M.

5/7/2025

Wow, thank you for sticking with us, Don! That is awesome. I think you made an excellent choice here. Timbrens are tough and the heavy duty are SUPER tough. Glad to hear these were a good fit. Love the photos! Is that your own property?

Don profile picture

Don

5/21/2026

The TIMBRENs work as stated during when I am pulling anything heavy. However, when the truck is not pulling anything, anyone riding in the rear seat gets a very hard jarring jolt when driving over any roadway repairs, bumps, expansion joints on bridges. I wished that I would have went with the Super Springs, or the Road Active Suspension. I may replace the TIMBRENS later.

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

5/21/2026

@Don I'm sorry to hear that the Timbrens didn’t pan out to be as great as you originally hoped. Swapping over to the SuperSprings or the RoadActive Suspension will definitely have less of an impact on your day-to-day driving. Out of the two, the RoadActive Suspension would have the least effect. If you ever have questions about the RoadActive Suspension or the SuperSprings, let me know and I’d be happy to help out.
by:
It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.
Kate F. profile picture
Etrailer Expert

Kate F.

5/6/2026

Glad to hear the Timbren systems worked out so well for your RAM Van Mitchell! It’s great that you noticed the smoother, more progressive response compared to the factory bump stops, especially under load. Thanks for sharing your experience with both the front and rear installs, that’s really helpful for others considering the upgrade. What kind of loads are you usually hauling with your van?

by:
The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.
Lazer S. profile picture
Etrailer Expert

Lazer S.

6/16/2026

They definitely look like they are helping, Orlando! How are they when you aren't towing? We hear a lot of people say they can be pretty harsh when unloaded.

by:
Stiffens and corrects kneel in rear end of 2023 Chevy Silverado 1500. You will notice a stiffening of the rear end suspension while unloaded, but it’s a fair trade off to prevent sagging and porpoising while towing. I found it easier to pull the rear wheels and work from the side than underneath the vehicle while installing.
Kate F. profile picture
Etrailer Expert

Kate F.

7/13/2026

Bud, thank you so much for taking the time to leave a review! I'm glad to hear the suspension upgrade helped reduce the sagging and porpoising while towing. I also really appreciate you including the installation pictures and sharing your tip about removing the rear wheels. I'm sure that will help the next person tackling the install. Thanks again for choosing etrailer!

by:
The Timbren overload spring/bumper was east to install and did what it was supposed to do when I hitched up a camp trailer. These did not negatively affect the ride by any means and I don't have to worry about the troubles with air bags.
by:
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.
Robin H. profile picture
Etrailer Expert

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:
A very simple and straightforward installation once you get the oem bumper stops off (had a shop do that)
Timbren worked with me as I had a non OEM frame height (vehicle was lower than stock) to recommend the proper kit. Highly recommend contacting timbren if you are unsure of the proper kit to use. Ride is more stable. It does feel stiffer and less bouncy but am looking forward to seeing how it performs with my truck camper. Truck is a 1998 dodge ram 2500. Brake line over left side of axle needed to be secured to prevent damage.
Heather A. profile picture
Etrailer Expert

Heather A.

4/24/2026

Hi there, thanks for reaching out, that’s actually a common issue with this type of trim. The one you tried is a standard flat insert, but some RVs (like your NOBO) use a slightly domed trim to help it sit over the screw heads in the track. If the screws stick up even a little, a flat trim won’t fully snap in place, which sounds like what you’re running into. The best way to find the right replacement is to remove a small piece of your original trim, lay it flat, and measure the full width from edge to edge. Most are either 3/4" or 1", but the shape matters too, not just the width. If yours has that domed profile, you’ll want something similar or a softer vinyl that can flex over the screws. If you’re able to send a quick photo of your track or old trim, I’d be happy to help you find a better match.

by:
2001 toyota Tacoma
Well they are exactly what I thought it would be. Hard for me to say it's what I needed yet.
I installed them on a homemade trailer from a salvaged 2001 base model tacoma. Once I get finished building it out and have some weight in it I'll have a better idea. But from what I've seen so far on a couple test drives they should come into effect when needed.
For reference I building an Tacoma based trailer with an ARE Contractor topper with a Naturnest roof top tent on the very top. So to counter and sway these should be very helpful. At least I hope so. I'm not an engineer but I did stay at an Holliday Inn once.
Mike L. profile picture
Etrailer Expert

Mike L.

4/23/2026

Niiiice, I see what you did there!! That looks like a sweet setup!

Mike L. profile picture
Etrailer Expert

Mike L.

4/23/2026

@Bill That's outstanding, good job!!
by:
2025 Chevrolet Silverado 2500
The Timbren SES is a simple solution for rear squat when towing. When hitched to my 30' Airstream Globetrotter (8800 GVWR) with a tongue weight around 1200 lbs, my Silverado 2500HD had a bit more squat than is ideal. I shopped airbags but didn't want to spend ~$2K for the set up and didn't want the hassle of installation and forever chasing air leaks. The Timbren SES literally installs on the Silverado in about 15 minutes. So simple. No bags, no compressor, no wiring, no air lines, no leaks. And WAY less expensive to boot. Just returned form a 600+ mile trip and it towed flawlessly.
Mike L. profile picture
Etrailer Expert

Mike L.

4/2/2026

Glad to hear they worked well for you Jerrod. Hope you had a good trip!

by:
2,000 miles in on a trip from the east coast to the Canadian Rockies these work great while loaded and towing. Close to zero bounce while towing, I love them. Unloaded, however, the ride in my 2026 Tundra has gone south. There is a noticeable, abrupt stop of the units hitting the axle when going over any kind of bump. When I get home and back to regular driving, I may just take them off, its that bad.
Lazer S. profile picture
Etrailer Expert

Lazer S.

7/20/2026

Glad they are working well for you, Kevin! Well, while you are towing, that is. We have heard that these can be pretty rough when unloaded, but work great when you are loaded. A quick release function on these would make taking them off when not towing a lot easier. I may pitch that to Timbren to see if they can work something out. I will tell them to call it something like the Kevin Device if they agree! ^___^ Sounds like quite the trip! What has been your favorite stop so far?

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See what our Experts say about this Timbren Vehicle Suspension

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    You are dead on. The only difference between the Timbren Active Off-Road Bumpstops - Rear Suspension - 2,000 lbs # TABSFR150RB and the 2400lb # TFR150RB for your 2018 Ford F-150 Raptor is the load rating. The correct system will come down to what you plan on towing or hauling, but you will more than likely be just fine with the lower rated # TABSFR150RB, and unless you are truly going to exceed 2000lbs tongue weight or payload I recommend going with this system as the heavier duty system...
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  • Timbren Rear Suspension Springs and Bump Issue on 2019 Ford F-150 Raptor
    The Timbren Suspension Enhancement System - Rear Axle # TFR150RB will provide great load support but it may feel a little jolt when you hit a bump or pothole. There is not a airbag system for your truck presently, so I recommend instead using the SumoSprings Solo Custom Helper Springs - Rear Axle # SS52GR. These springs will provide load support but will not have as harsh a bump when they begin to engage as the TImbren brand. Timbren springs are great but that firm hit going over a...
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  • Jounce Bumper Suspension Enhancement Recommended for 2018 Ford Raptor
    We certainly do have bump stop helper springs that replace the factory bump stops in your 2018 Ford Raptor. For the best ride quality, I'd recommend going with the SumoSprings Solo, part # SS52GR which will provide up to 1500 lbs of additional support. The Timbren # TFR150RB would work as well, but when they're under load, you'll have a harsher ride than what would be experienced with the SumoSprings option I mentioned.
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  • Height Of Timbren Suspension Enhancement System TFR150RB For 2019 Ford Raptor
    I had our warehouse measure the Timbren Suspension Enhancement System # TFR150RB for your 2019 Ford Raptor, and it has an overall height of 5-9/16" as shown in the included diagram. The mounting bracket measures 1-1/8" tall, the spacer is 1/2" tall, and the spring is 3/15/16" tall. I included a video of the # TFR150RB for you to take a look at.
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  • Why Does My Truck Still Have Sag After Using a WDS
    You don't need the Timbren Suspension Enhancement System # TFR150RB, it sounds like you just need to adjust the head on your WDS so that more of the weight gets distributed to the front of your truck. It is worth noting that the Raptor models are not really meant for towing - this is due to the softer off-road style suspension which is designed for more travel than standard suspension. I have also included a video below that shows you how to adjust the head on your WDS as well.
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  • Best Rear Suspension Upgrade for the 2020 Ford Raptor
    I really like the SumoSprings Solo Custom Helper Springs - Rear Axle part # SS52GR for this situation. They engage much more smoothly than the Timbrens part # TFR150RB do. The overall user experience is going to be better for you since you won't feel them engage which is common on the Timbrens. The 1500 lb. capacity is at 50% compression so at about mid stroke the more they get compressed the more weight they take up. Please keep in mind this doesn't raise your vehicles towing capabilities...
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  • Can I Install Timbren Bump Stops in addition to RoadActive #RAS3611 for a 2017 Ford F150 Raptor?
    Hi Teodoro, Since Timbren bump stops will replace your factory bump stops and will sit above the rear axle of your 2017 Ford F150 Raptor, you can install them in addition to the RoadActive suspension # RAS3611 you currently have on your truck as the two systems will work independently of each other. I recommend the Timbren Suspension Enchancement System # TFR150RB which has 2,400lbs of load support to help reduce sag and roll to give a more comfortable ride. I'm thrilled that your RoadActive...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Updated by:
Michael B
Employee Carrie F
Updated by:
Carrie F
Employee Lincoln B
Updated by:
Lincoln B
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H

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