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  1. Trailer Axles
  2. Timbren
  3. 5200 lbs
  4. Universal Fit
  5. Spindles Only
  6. No Drop or Lift
Timbren Axle-Less Trailer Suspension - Heavy Duty - Long Spindle w/ No Drop - 5 Bolt - 5.2K
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Timbren

Timbren Axle-Less Trailer Suspension - Heavy Duty - Long Spindle w/ No Drop - 5 Bolt - 5.2K

Part Number: T43AV
In Stock
$1,548.96
Trailer Axles
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Designed for use with wide, off-road tires, this setup gives you more clearance and a smooth ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, long, standard-height spindle maintains deck height. Fits any trailer frame width. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension - Heavy Duty - Long Spindle w/ No Drop - 5 Bolt - 5.2K part number T43AV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (167)
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Timbren Trailer Axles - T43AV

Highlights

  • 5,200-lb Capacity: Handles heavy trailers while keeping ride stable and controlled.
  • Axle-Less Design: Increases ground clearance and fits any trailer frame width.
  • Rubber Jounce & Rebound Springs: Absorb road shock for a smoother, quieter tow.
  • Independent Suspension Units: Each side moves separately for better handling on rough terrain.
  • E-Z Lube Long Spindles: Simplifies bearing maintenance with built-in grease zerks.
  • 5-Bolt Brake Flange: Accepts standard electric brake setups for reliable stopping power.

Features to know about

More Clearance When You Need It: 4" Lift Spindle Handles Off-Road Tires

Tight driveways, rocky trails, and steep ramps are no match for the 4" lift built into this Axle-Less suspension. With room for tires up to 35" x 12.5" x 20", it gives the trailer the ground clearance it needs for off-pavement use. The design eliminates the thru-axle completely, so you get full clearance from front to back without anything hanging low to snag.

Independent Suspension That Tracks Straight

Each wheel works on its own, so bumps on one side don’t send the whole trailer rocking. Built-in camber and toe-in keep things aligned so it tracks straight and wears tires evenly. The AEON springs compress vertically instead of twisting like a torsion axle, which keeps stress down on suspension parts and makes cornering more stable with less roll.

Side-by-side comparison of torsion axle and Timbren Axle-Less Suspension showing improved clearance from front to rear of trailer

Built Tough for Heavy Loads: 5,200-lb Capacity Steel Construction

This system is rated for 5,200 lbs and built from heavy-duty steel with a black powder coat finish that resists rust and road wear. The EZ Lube spindles make greasing simple, and if a spindle ever gets damaged, it can be removed and replaced without changing the whole unit. It’s a strong, serviceable setup that’s ready for long miles under load.

Simple Bolt-On or Weld-On Installation Options

No custom axle fabrication needed—each unit bolts or welds directly to the trailer frame. If there’s no crossmember where you’re mounting it, a piece of 2" x 3" steel tubing can tie both sides together using the built-in holes for added strength. Three clear install methods make it easy to reinforce your frame and get everything square so alignment stays right from the start.

Installation option one for Timbren Axle-Less Suspension using 2x3 inch steel tubing through integrated hole for added trailer frame support

Timbren Axle-Less Suspension installation option two using fabricated inboard extension plate for frame connection

Timbren Axle-Less Suspension installation option three showing hanger bolted to trailer frame and existing crossmember for secure fit

Specs

Application

  • Application: single- and tandem-axle trailers that use wide, off-road tires
  • Tandem-axle trailers require: 2 complete systems
  • Not recommended for: triple-axle trailers

Quantity

  • Quantity: 2 suspension units (without hubs)

Weight and Capacity

  • Weight capacity: 5,200 lbs

Brake and Mounting

  • Brake flange configuration: 5 bolt
  • Bolt hole diameter: 5/8"

Suspension

  • Suspension travel: 2-5/8"

Warranty

  • Warranty: 3-Year limited warranty

Tire, Wheel, and Hub Compatibility

  • Tire size: 35 x 12.5 x 20 or smaller
  • Wheel diameter: 16" or larger
  • Assumes a wheel with: zero offset

Bearings (sold separately)

  • Inner: 25580
  • Outer: 14125A or 15123

Races (sold separately)

  • Inner: 25520
  • Outer: 142376 or 15245

Seal (sold separately)

  • Seal number: 10-36
  • Inner diameter: 2.250"
  • Outer diameter: 3.376"

Note

This Axle-Less system requires crossbeam support. If your trailer frame doesn’t have a crossmember in place, you can retrofit it with one, or you can add a support by running a piece of 2" x 3" steel tubing through the square holes cut into these units. You could also add a steel reinforcement bracket to the inside of the trailer frame.

Diagram of Timbren Axle-Less suspension parts showing labeled components such as jounce spring, rebound spring, trailing arm, and E-Z Lube spindle.

  • The jounce spring: supports the weight of your trailer and cargo. It easily absorbs road shock and is constructed of AEON heavy-duty, hollow rubber.
  • The rebound spring: delivers a smooth, stable ride - regardless of how much cargo is on the trailer. It controls the movement of the jounce spring to minimize trailer body roll, bounce, rattle, and bottoming out.
  • The trailing arm with integrated hanger: attaches the suspension to the side and bottom of the trailer frame.
  • The control arm: carries the spindle and the hub. It pivots on strong, long-lasting polyurethane bushings that never require lubrication.
  • The E-Z Lube spindle: is simple to grease. If damaged, it can be removed and replaced, saving you both time and money compared to a traditional axle.
  • The built-in hole: accepts 2" x 3" steel tubing (not included) to add support to your trailer's frame. The tubing sits higher than a trailer axle, providing additional ground clearance.

ASR52HDS05 Axleless Trailer Suspension System by Timbren for Off-Road Tires - Standard Height Long Spindle - Without Hubs - 7,000 lbs HD





Video of Timbren Axle-Less Trailer Suspension - Heavy Duty - Long Spindle w/ No Drop - 5 Bolt - 5.2K
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Timbren Trailer Axles - Axle-Less Trailer Suspension - T43AV

Hi everyone, Steve here with etrailer.com. Today we're looking together at our Timbren axle-less trailer suspension system. It's a heavy duty with a long spindle, no drop, and your standard five-volt flange for your brakes, and it's rated to 5,200 pounds capacity. Now I wanna start with saying this should only be used for a single or tandem axle trailer, never up past two axles. And it is pretty much used and designed for low pressure off-road tires. Now the spindles, to start off with, can be disassembled separately from the main unit.

So as you see here, this would mount just like that. The spindles have grease zerks on 'em, all the information as far as the bearing sizes, all that kind of stuff, the hubs, the brake assemblies, that's gonna be on the page. If you scroll down into the specs and everything, you can find all that information. Those are gonna be sold separately. We're just looking at the main kit here.

So this is the right hand side, this is the left. This would be one axle. So if you need to do two axles, you need to change your quantity to two in the cart for the whole system here. Now the neat thing about them being separate across this, it's gonna increase ground clearance, so you're not gonna have to need a through axle. You could potentially lower the deck height to make easier load and unloading and those kind of things.

Now these use what's called an Aeon progressive-rate main spring here, that's this big rubber spring. That's gonna absorb road shock. It's gonna support the trailer's load, deliver a smooth, stable ride regardless of the load size. So these are actually gonna compress and become stiffer as your load weight increases, thus boosting your spring strength. The rebound spring acts like a return device.

It's gonna minimize rattle, minimize bottoming out, and they create a constant pressure on the arm itself. So they're going to minimize rattle and bottoming out. But also the suspension's never gonna be completely relaxed. I already talked about the ground clearance and all that. These can fit any trailer width because they're independent of each other. You can install these one of three ways. The first one, in my opinion is the easiest. You get yourself a two by three inch rectangle tubing from your local weld shop, and you slide that through there to that integrated hole. And then you simply need to bolt the suspension to the trailer side of the trailer frame with the bolts that are included. The second option is gonna be to fabricate an inboard extension plate that would sit up here and that attaches to your trailer's frame and then to this, kind of sandwiching in on this part right up here. Now the last way is to install this suspension hanger here to the trailer's frame and an existing crossmember in the area where you want to install the suspension. So a couple options that you have out there. Just check your personal needs, wants, desires, what you're doing, and make sure you get the best possible choice to fit your needs. Now again, these are rated at 5,200 pounds capacity total when used in conjunction with each other, meaning I've got both of 'em installed correctly. Now these are gonna be easy to install, easy to align. You simply bolt or weld 'em into your trailer's frame. And again, hubs, bearings, brakes, that's all sold separately. As you can see, they're heavy duty steel. They've been black powder coated to give you that nice corrosion-resistant finish. Now these also have built-in camber and toe-in and that's gonna help the trailer to track straight, thus reducing wear and tear on your tires, your brakes, and your overall load. Now again, these are designed for over-landing or off-road adventures, so keep that in mind when you're purchasing this. That's what they're designed for. That's why they have the suspension and everything. So make sure you're getting the right part for your specific needs. As always, we would love to see feedback on the websites and reviews, maybe some photos before and after. How are you using these What are you using them for What could the manufacturer improve on to make it better What kind of things are great that you love about it That's gonna wrap it up. I'm Steven, thanks for watching.

Ratings & Reviews

4.6

167 reviews
Review sort icon
Designed for use with wide, off-road tires, this setup gives you more clearance and a smooth ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, long, standard-height spindle maintains deck height. Fits any trailer frame width.

by:

We made an amazing creation out of those two axle-less axles.
We made a large fuel cell that is used for offroad use and it has worked excellent this entire time.
They are really great products and we would love to work with them again.
Actually, we do a ton of social media stuff and youtube and if you ever have interest in sending us products to build content around, I would love to have the opportunity!
Thanks,
Michael Brandt
Garage Bound, LLC (On Youtube and Instagram and all the other socials)



by:

Be warned! I would not buy from Etrailer ever again. We received our order and Etrailer failed to send the entire trailer axle kit. They did not include one spindle in the kit, rendering our order useless without ordering an additional spindle. Because more than 30 days had elapsed before reporting the issue, Etrailer refused to send the spindle, in addition to insinuating that I was deceiving them. This must be how they increase their revenues…don’t send the entire order, and if the customer does not catch it within 30 days, the customer loses and Etrailer makes more money. Absolutely horrible customer service from the company who failed to fulfill their end of the contract while accusing me of being deceptive. One star is far too generous for Etrailer and their scams.



by:

I mounted these axels on my off road trailer, this trailer has 37" tires (same as my jeep) tracks perfectly on the road at 60 - 70 mph, Last summer I pulled this trailer on the Rubicon trail were while on the rocks the lean angle was so extream my trailer turned over on its side, when I winched my trailer back on its wheels all the weight of the trailer was on one axel. Timbren Axle-Less trailer axels are so well built and strong nothing bent, everything stayed intact. There is no sag in these axels as well. I could not be more pleased with the Timbren axels.



by:

Very pleased with the design and heavy duty construction of these axles. Used them to build an off-road trailer and they performed flawlessly throughout many challenging trails and off road situations. My only complaint is that the ez-lube hub design does not take grease very easily. I've had to disassemble the hubs to properly grease both bearings due to the inadequate amount of grease flowing into the bearings.



by:

I replaced a failing torsion bar suspension and replaced with a timbren suspension it was a straight forward installation.



by:

I installed these on a small jeep style camping trailer that I built. I plated my frame and also used the suggested two inch square tubing to tie them together. It rides very well, looks like it should be very durable, it's a simple design, simple to install, more economical than other independent systems, has less parts to go bad than other systems, I would highly recommend to any body using a trailer on rough roads!



by:

Hello I just received my order today that I only placed on Wensday. That night at 7:30 pm. I received an email stating your order is ready for shipping! I received my order on Friday WOW FAST FREE SHIPPING. Great product fast shipping. I'm going to start building OVERLAND TRAILERS.



by:

building a ground loading motorcycle trailer the bed drops down flat threw the frame resting on the surface under the trailer allowing the motorcycle to be driven on without ramps or tilting the trailer bed the axle less trailer suspension is the only way to go and it rides better .



by:

I think their axle-less design is very clever. The build quality of the suspension part looks good. I have heartburn over the spindle build quality. The spindle is mounted to the suspension and then the trailer wheel mounts on the spindle. The spindles I received are warped from welding. The plate that bolts onto the suspension does not mount flat due to this warping. I called Timbren. The gentleman that helped me was very pleasant. I described the problems and he said he would check his inventory and call me back. He did call me back and said they are all like that. He said get out the grinder and fix what you can and just tighten the bolts super tight, maybe the gap will go away. Really? Wow. The other problems are a LOT of weld spatter where the bolts are supposed to fit and they made a bend in the plate too close to the bolt holes so two bolt heads hit the bend and dont fit flat against the part they are supposed to hold together. Yikes! I am taking the spindles to a machine shop to fix them but I would not have ordered this Timbren stuff had I been warned before hand. So, fair warning.



by:

I love them ride is great. Quality product and easy installation



by:

Well made quality axle. The box it was shipped in failed. I hope all the parts are there.



by:

Great looking parts, robust design, professional looking welds....Nothing missing...

I contacted Timbren prior to my purchase and received a prompt, helpful reply...

The supplied instructions are complete and straight forward, i'm confident should i have any issues, contacting them will get them resolved...



by:

Love these axles. Will install in a week or 2. Fast shipping



by:

Outstanding product. I installed this set up on a M1102 military trailer. Straight forward install once the original axle is out of the way. The ride is much better and handles the roughest of trails very well. Also, with the more modern hub you have a lot more choice in electric brakes and wheel bolt pattern.



by:

Great product so far after 1 year. Everthing is holding up and i have put it to good use on multiple occasions. The lift kit made my trailer off road capable and performed to my expectations.



by:

I love these. 30k miles and still going. Almost 1k offroad and they're still holding up. Fully loaded my overlanding trailer weighs 2k lbs, empty 1360 lbs. They did settle a little, but I just raised my fenders a little.



by:

In one word: awesome! I used these to replace a wimpy torsion suspension on a small trailer. Torsion is not made for offroad and I also wanted to add some lift to the trailer. This thing improved the ride and handling a lot. Before when the trailer was empty it would actual jump off the ground when I hit a bump or speed hump. Now it actually has travel in the suspension whether loaded or not and the improvement is noticeable right away.
Notes:
1) This is a trailing arm suspension, so in order to stay centered in the existing wheel wells it needed to mount about 8 inches further forward than the existing torsion suspension was. My trailer didn't have frame where I needed it, so I had to do some fabrication to mount the Timbren forward the 8 inches needed.
2) My original suspension the wheel center line was actually above the bottom of the frame rail by a few inches. The Timbren as you can see in the pictures the hub (wheel center line) is 6 or 7 inches below the bottom of the frame rail that it mounts to. So in the end the Timbren with no lift or drop actually lifted my trailer about 9 or 10 inches. This was perfect for my needs because it was WAY too low before and I am using it on really hilly dirt roads and it handles them like a champ!
3) You are most likely going to need a 2 inch square bar tube to connect the two sides for stability. If you are doing the install DIY, I would wait until the Timbren are installed so you can measure exactly how long you need. This stuff is really, really hard to cut so it is nice to be able to tell the metal shop to cut to length when you are buying it. I got mine at a local metal shop.
4) IF you are replacing leaf springs with Timbren, notes 1 and 2 will still apply but you will need to make the measurements to make sure you get the wheels in the same spot under the wheel wells and also measure to see if you need to get the no drop, drop or lift version of the Timbren



by:

After a great deal of research, I ultimately chose the Timbren long arm kit to replace the torsion axle under my teardrop trailer. My initial impression is that there is simply no comparison between the two. It now rides better, pulls better and handles better than I could have imagined. The Timbren axle system is incredibly well built and is much more confidence-inspiring. While the spring rate closely matches my trailer weight, the components are much more rugged and robust. The spindles, bearings and brakes are rated at double the capacity of my old axle which gives me great peace of mind. I pull my trailer, both on and off road, anywhere it will fit and the long travel and heavier components are a game-changer for my travels. Installation, while requiring a bit of forethought, was otherwise straightforward and methodical. Documentation available from etrailer and Timbren, is second to none. Instructions were clear and concise with drawings and detail taking the major guesswork out of the equation. Even though, due to the odd frame design of my trailer that required a bit of work to adapt, I ended up making some frame stiffeners, the adaptation was as simple as it could possibly be. I've ordered from etrailer in the past and they were 100% accurate on this order as well. I ordered the Timbren kit without backing plates and hubs due to the requirements of my trailer and etrailer suggested, explained availability and supplied all of the components I needed. They truly a stress-less bunch of folks with an extraordinary website. I'll no doubt turn to them again...



by:

Here are some pictures of my Timbren axle installation. I used a 2000#
axle and a 3500# spindle combination. I am running a original 14" tire.
It was a moderately easy installation.



by:

Incredible system. Handled our Overland trek through Colorado and Moab. These axles on our 1917 Ford bed ran multiple Jeep Badge of Honor trails. The suspension handled flawlessly. Handles off camber rocks and drop offs smoothly. We ran the 4 inch lift and off road offset to fit the factory Jeep wheels.



by:

Used this on a camping trailer behind our Jeep. The suspension handled 1000 miles of washboard gravel roads and mild rocky offroading with ease. We don't drive gently and had the trailer airborne at one point. The brackets that we opted to fabricate for them were straightforward and simple to install. I especially like the ground clearance under the trailer that you gain due to the lack of a solid traditional axle. The ride quality overall was excellent, especially given where we took it. In hindsight we should have gotten the 4" travel version as it may have been able to soak up deep ruts at 40mph a bit better. Only mild complaint is that the powdercoating on the leading edges had already begun to flake off when we received the suspension. I hit it with a can of spray paint, but I would have hoped it would be more durable. Overall, I will definitely be purchasing this axle-less suspension again for my next trailer build.



by:

Excellent, helpful customer service sold me this product, and trust me when I say it's worth the price tag. Pulled the old axle and leaf spring off a 60's era Bantam and swapped out for this with a support bar in between. Bumped up tires to 315/75r16 BFG TA/KO's to match my rig and am amazed at how much better this trailer now pulls. Empty it wad bouncing all over the place with the old axle and leaf spring setup. Now I hardly even know it's there. Was very easy to install, took a couple hours but I am happy with how it turned out. A+++ product and customer service!



by:

I was looking for a low profile axle system for my motorcycle trailer. The primary requirement was to be able to load my motorcycle by myself which required a low-profile trailer. With the 4" drop provided by Timbren, this setup turned out great. I originally intended on using ramps but after I swapped the leaf spring axle out with the Timbren, I found I was able to ride my motorcycle on/off without the need for the ramps.

Originally, I was going to go axle-less but I found when torquing down the assembly to my frame it started to compress the aluminum rail. To take the pressure off the frame I added the 2" bar from axle to axle. Pulls smooth and effortlessly.

I've had several people comment on the trailer height with one wanting to buy the trailer from me. This person worked at the local Honda Dealership. He thought it was a great design and I would imagine he's seen a variety of trailers come through his lot.

The other option I considered was a torsion axle but I was looking for the lowest profile I could get. Therefore, cost was not a key factor. I also like the soft ride the Timbren system provides. Not sure if the torsion design would have been as smooth over bumpy roads. Regardless, I'm pleased with how this project came out.



by:

So we had a torsion axle / frame failure and these and a new subframe was our solution! Amazing product upgrade with 12" brakes and 7000lb HD Running 16" BFG ko2 tires ! These are truly bolt on if you don't have frame problems also if your running single axles on the west coast and mountains the 12" brakes are a huge upgrade!!!



by:

Timbrens work great! They make my homebuilt camper tow smooth, straight, and no bounce. Off road they give me better control and don’t make my light camper jump around on the trail. Install was straight forward, instructions were adequate and overall went pretty well. Staff at etrailer helped me pick the right bearings and provided great customer service as usual. I would recommend these to anyone looking to improve their trailers handling and towing characteristics.


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See what our Experts say about this Timbren Trailer Axles

  • Choosing the Correct Replacement Axle Without a Leaf Spring
    Hey Joaquin, I can definitely help you out with this! What is the weight rating of your axle, and what are the hub-face and spring-center measurements? These will help me to figure out what you need. Also, are you looking to stick with a traditional axle system, or switch over to an alternative style like the Timbren Kit # T43AV that uses rubber springs instead of leaf springs? Let me know what you find with the information above, and we can continue on from there!
    view full answer...
  • Suspension Upgrade Recommendation for Toy Hauler Taken Off Road
    Hey Michael, the Timbren Axle Less systems like the part # T43AV which is a 5.2k axle setup would be your best solution. These are just a lot tougher than standard trailer suspension which just wasn't designed for off-road whereas the Timbrens definitely had that in mind when they designed them. Do you have a "you break it you buy it policy" at all?
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Steven C
Installed by:
Steven C
Employee Leah S
Edited by:
Leah S
Employee Dawn Z
Written by:
Dawn Z

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