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Dragging an axle across rough ground can end a trip fast. This heavy-duty Timbren Axle-Less trailer suspension solves that with a built-in 4" lift and no thru-axle hanging below the frame. The design fits any trailer frame width and gives wider, off-road tires room to work. With up to 7,000 lbs of capacity and long spindles that accept wide tires, it keeps the deck height the same while adding serious ground clearance for uneven roads or steep driveways.
Bouncing and rattling are common when you haul over washboard roads or hit potholes. This suspension uses Timbren’s AEON rubber jounce springs to absorb impacts and support the trailer’s load, while rebound springs steady the ride and cut down on roll and bottoming out. Each side works independently, so bumps on one side don’t transfer shock to the other. The result is a stable, quiet ride whether the trailer is empty or fully loaded.
When you’re hauling big weight, you need suspension parts that can take it. These two bolt-on units replace one full axle assembly and are built from heavy-gauge steel with a black powder-coat finish that resists rust and corrosion. The setup carries up to 7,000 lbs and uses a 5-bolt brake flange and 1/2" bolt holes for secure mounting. It’s the kind of hardware that stands up to abuse on long, demanding trips.
Keeping bearings greased shouldn’t be a chore. The E-Z Lube spindles have built-in grease zerks for simple maintenance. If a spindle ever gets damaged, it can be replaced without swapping the entire suspension. The polyurethane pivot bushings never need lubrication and keep movement smooth through 3-3/8" of suspension travel.
Because this system removes the axle beam, it includes square holes for a 2" x 2" steel crossmember to keep the frame square and strong. That tubing sits higher than a traditional axle, so you keep the clearance advantage while reinforcing the frame. It’s a straightforward way to combine solid structure with off-road performance.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello neighbor Steven here with etrailer.com. Today we're looking at the Timbren axle lift trailer suspension with the heavy duty long spindle and a four inch lift. Now folks, this is what they consider a five volt spindle and it's rated at 7,000 pounds capacity. Now folks, I'm kinda limited on space today, so I wanted to kind of throw everything up here the best I could and give you an idea of what you're gonna give. But I wanna start off, I show you an image so you will get all the hardware and everything you see in the picture. I don't have the hardware laid out today due to space.
So again, you're left and right hand side, two spindle assemblies and all the hardware spacers, castle nuts, Kotter pins, everything you see there. Now getting into it folks, this will help deliver a nice smooth, stable, quiet ride regardless of the load size up to 7,000 pounds. This internal jounce here is gonna absorb the road shock and also support your trailer's load. The spring does rebound, which is gonna reduce body roll rattle, bottoming out, those kind of things. And it has a built-in Camber and tow in to help reduce the wear and tear on those trailer tires.
The units do work independently, one from each side, so what affects one side will not affect the other side. So that's a nice upgrade and feature of these as well. Now again, I don't have the hardware laid out here, but roughly to show you what this guy looks like installed pretty much something like this and you'd have it all bolted together obviously and everything. It does have a nice black powder coat finish. It's gonna resist rust and corrosion.
It is super, super thick, very robust, heavy gauge steel construction. It's gonna handle all the road abuse that you can send its way. Now the long spindle here accepts wide Off-Road Trailer Tire, so that's a nice feature and it is two separate units so you can bolt directly to your trailer frame and it is designed for like over-landing, off-road, that kind of stuff. Now the nice thing with a drop spindle is that it'll keep your trailer deck height the same but increase the ground clearance. Now everything here has built-in greaser, so you can see on the tip of the spindle there to make maintenance and that kind of stuff, minimal and easier to get to.
So it's compatible with the tire size of 235 85 16 or larger, and a wheel diameter of 16 inches or larger, the bearings and everything is sold separately. That's part number 25580 on the inner bearing. And the outer bearing is a 14125A. And then those matching races are sold separately. The grease seal would be a 10-36 also sold separately. Now folks, this is designed for a single tandem use trailers. Do not use it for three axles, it's all rated for two axles, most. Now if you want to do two axles, you would need two sets of this kit. Now keep in mind your hub drums, all that stuff is sold separately, 7,000 pound capacity. And one other thing to note that you can kind of see the square that goes all the way through. Let me zoom in here. So this square goes all the way through. That's for installing a cross beam support. So this axle system still requires a cross beam support. If your trailer frame doesn't already have one in place, you can retrofit it by simply getting a two by two inch steel tubing and run it through those and cut it to length as needed. Or you could also simply add a steel reinforcement bracket on the inside of the trailer frame. Well, I think it's gonna wrap it up for our look at this Timbren axle list trailer suspension. Again, you're getting the whole kit, all the hardware and everything included as you see in the photo there. Folks, thank you so much for your time. I'm Steven, thanks for watching and have a great day.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
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.