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Rough terrain or an empty trailer can make for a harsh ride. The Timbren Axle-Less Trailer Suspension uses AEON heavy-duty hollow rubber jounce springs that absorb road shock and support the trailer’s load. A matching rebound spring keeps body roll and rattle to a minimum, so towing feels steady whether you’re fully loaded or running light. With 2-5/8" of suspension travel, this setup smooths out the bumps and keeps your cargo protected.
Standard axles hang low and limit where you can tow. This system eliminates the thru-axle entirely, giving your trailer full ground clearance between the wheels. The built-in 4" drop spindle lowers the deck height for easier loading and unloading, while still keeping plumbing and frame components higher off the ground. The result is a trailer that’s easier to load and better suited for uneven roads or steep driveways.
Traditional axles tie both sides together so one bump affects the whole trailer. With this Timbren setup, each side works independently. That means smoother cornering, less sway, and more control when navigating uneven ground or making tight turns. The built-in camber and toe-in help reduce tire wear, keeping your setup tracking straight and stable mile after mile.
Built for real-world use, each suspension unit is made from robust heavy-gauge steel that’s designed to handle abuse. The black powder-coat finish resists rust and corrosion from water, salt, and road grime. Polyurethane bushings at the control arm pivot points don’t need lubrication, and the E-Z Lube 4" drop spindles include grease zerks for simple bearing maintenance.
Because there’s no cross-axle to size or align, this Axle-Less suspension bolts directly to your trailer frame and fits any frame width. The system replaces one entire axle and suspension assembly with two separate units rated for a combined 3,500-lb capacity. Each has a 5-bolt brake flange with 5/8" bolt holes and mounts using Grade 5 hardware (not included). A crossmember or 2" x 3" steel tube can be added through the built-in square holes for extra frame support, ensuring the trailer stays square and true.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Now, let's take a look at our conventional Lee Spring suspension versus our Timbren suspension. As you can see, there's a lot less movement. The trailer doesn't bounce up nearly as much, so it's generating a lot less noise. Overall, it's going to offer a much smoother and more controlled ride. Now, let's take a look at our Axle-Less suspension system as we go out through our test course. You can see as we're hitting the different bumps, you're not seeing as much movement as what we're used to with the conventional suspension system.
It recovers very quickly. Now, as we're just doing some maneuvering around our parking lot, you can see there's no trailer roll side to side. With them working independently, it helps keep everything level.
Ratings & Reviews
Conrad S.
4/1/2015
HI Matt,WHat size wheel did you use and which hub did you get to match?Appreciate the info
Matt N.
2/6/2016
They are GREAT! I put them on a small offroad trailer that has followed me all over some really rough roads in remote Oregon, Washington, and Idaho. They have performed flawlessly, helped the trailer tow extremely well, and were the single best upgrade I did to that trailer. Very much looking forward to another summer of exploring! Massive upgrade to the stock axle leaf spring combo, and I have had the opportunity to show it off to alot of fellow overlanders. I cant speak high enough of them. I also purchased a set of airbags for my vehicle which unfortunately have not held up terribly well. I have had to field repair one once already, and neither holds air terribly well. Truth be told they seem very underdesigned for the job they perform. From my super secret high tech pocket internet window.
Michael
1/15/2016
Ashley, the 4 version doesnt actually give it more travel. Its the same was the standard or the system as far as suspension travel. What the 4 system does it lift the height of the trailer from the ground, depending on what youre doing with the trailer. For an off road trailer I personally would do the 4raise for added ground clearance, just gotta make sure the trailer doesnt get top heavy. The standard system is good for pretty much all uses and the system is for when you need a really low deck height for a lawn mower or go kart for example. I appreciate your review as I am going to be building a small off road campingbug-out trailer to tow behind my lifted FJ cruiser. I havent decided if I am going to go with the standard height or the 4 lift as I am going to be running the same off road tires toyo RT that I have on my FJ on the trailer and I want the trailer to sit around the same height. Did you add brakes to yours? Im planning on either running electric brakes or if available in am going to run surge brakes.
Ashley
1/18/2016
Michael, My trailer was so light even fully loaded that I didnt see the need for brakes and never missed having them.I stand corrected: We did get the 4 lift, but the non-HD instead of the HD because the specs said that it had a bit more travel. and we didnt need the weight capacity. That being said, Im still happy with how this suspension performs. My trailer is on 31s on a stock Cherokee.
Gwendolyn Y.
10/23/2025
Can't wait to hear how the install goes, Christopher! What kind of trailer are you going to install them on?
Steve
9/11/2025
It is perfect.
Quality M.
9/26/2013
Your comments regarding the Axle-Less Suspension are greatly appreciated. To address the issues you have pointed out, we have carefully reviewed our assembly. While we did not come across any major issues, we did however discover a few areas where the quality could be improved, specifically in the areas you brought to our attention. The following improvements have been made to improve the manufacturing process: - Robotic welder gun re-programmed so that it stops from getting too close to the areas adjacent to the mounting holes of the outboard arm and control arm. This will minimize weld spatter. - The distortion of the flat plates is due to the high degree of heat generated during welding. We conducted experiments, changing the sequence of welding operations until we were successful in minimizing the distortion. We apologize if our customer service in addressing your concerns was insufficient at the time of your phone call. Timbren is an ISO 9001:2008 company with an excellent reputation for providing customers with quality products that are well-performing and easy to install.
Larry D.
9/28/2017
WORKING GREAT MUCH BETTER RIDE STILL 5 STARS
Robert
3/7/2021
Fantastic O will ONLY use Timbren Axles on my Overland Campers
Robert
3/7/2021
Fantastic O will ONLY use Timbren Axles on my Overland Campers
Philtreeman
11/20/2019
We just drove 1200 miles mostly at 75mph. The axles work very well in all conditions, trailer ride very smoothly.
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Pat A.
3/15/2018
Its been a year since Ive installed the new axles on my trailer my comments above still hold true. Im very pleased with the ride quality of the system after a year. The trailer tracks true and has hauled many things other than my motorcycle. Even empty it doesnt hop around like the original stock straight axle did. No regrets on the purchase.