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Bumps and potholes don’t have to shake everything inside your trailer. This Axle-Less suspension uses AEON heavy-duty jounce and rebound rubber springs to absorb hits and limit body roll, bounce, and bottoming out. The jounce spring supports the load while the rebound spring evens out movement, giving you a calm, stable ride whether you’re hauling gear or running empty.
Heavy loading height can turn every job into a struggle. The built-in 4" drop spindle lowers your trailer’s deck height without adding extra hardware. That means easier loading and unloading while the frame still clears obstacles underneath. The spindle includes E-Z Lube grease zerks for simple bearing service and maintains a strong connection through its 4-bolt brake flange and 1/2" bolt holes.
Traditional axles tie both sides together, so every bump travels across the frame. This system eliminates the axle beam entirely—each side moves on its own for smoother tracking and less noise. If one wheel hits a rut, it won’t jolt the other side. Built-in camber and toe-in also help reduce tire wear so your setup runs straight and predictable mile after mile.
This suspension bolts directly to your trailer’s frame with three Grade 8, 1/2" bolts per side for a solid hold. Strong steel construction with a black powder coat finish resists rust and corrosion. A built-in square hole accepts 2" x 2" steel tubing (not included) if you want to add a crossbeam support or reinforcement bracket to keep your frame square and tight under load.
Each unit carries up to 3,500 lbs total weight capacity and works with regular trailer tires up to ST215/75R15 on 15" wheels or smaller. The spindles fit inner bearing L68149 and outer bearing L44649 combinations with 10-19 seals and a standard 4-bolt brake flange—so adding electric or disc brakes later is easy. It’s a tough, versatile suspension that sets up cleanly and keeps rolling smooth trip after trip.
| A | B | C | D | E | F |
|---|---|---|---|---|---|
| 13" | 16-3/8" | 1" | 5" | 0" | 4-1/4" |
| G | H | I | J | K | L |
|---|---|---|---|---|---|
| 5-5/8" | 6" | 4-3/4" | 1-3/4" | 3-3/8" | 3-11/16" |
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 2" 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.
Alternate Instructions
Ratings & Reviews
This is my second Timbren independent suspension. Definitely the best ride on the road.
These are going on a single axle trailer. They appear to be heavy duty and well made. The shipping was quick.
Best suspension you can get for off-road trailers. We use this suspension on all of our VORSHEER XER trailers.
Five star. shipping was slow. Product was great 14 K 14 plies under 2000 pounds independent suspension. Low fast and sassy. Yep that’s how I build them.
We use Timbren's ASR5200S03 on all of our XOC and XOC-R trailers. These suspension are well built and have always performed well for us.
This is as close to a bulletproof suspension as they come. We use this suspension on all of our VORSHEER XOC trailers. They have performed flawlessly as an off-road suspension.
A must have suspension if you're building an off-road trailer!
We use Timbren's ASR3500S06 on all of our XER trailers. We couldn't be happier. It is a well built suspension.
Actual trailer weight 1540#, 210# tongue weight. 1310# suspension load. After 600 miles, both springs collapsed making the suspension rigid. Have received replacement springs from Timbren but haven't had a chance to try them out.
The order came in on time and the customer service at etrailer.com (Ashley) and Sean from Tmbren was outstanding. They both were very helpful in my choosing the right product for my needs. The axle less suspension's performance is absolutely superb. It vastly improves ride quality. I am using it on a teardrop camper that often goes on gravel roads and the raddling sound from the leaf axles was horrible. A couple of points to consider before you settle on the axle less suspension: keep in mind that you will lose some hight of the trailer. While you will gain clearance from the lack of the axle, the suspension will make the trailer sit lower than before.i had to lower my hitch by an inch to maintain the trailer leveled. Also it does appear to compress at higher rate than the leaf springs, which makes it softer but easier to reach it's limit. Overall this product is absolutely a must if you are looking to improve the safety and the quality of your towing.
Timbren saved our RV road trip! The leafs on the axle on our 2018 Jayco TT came apart while driving in Maryland. We tried going to the manufacturer, but they were useless. Going to a RV mechanic meant being grounded for at least 2 months. Then we found Timbren. With the help of Timbren's excellent staff we purchased axle-less system through etrailer, who made sure we got as quick as possible. It came ahead of schedule, my husband installed the Timbren system and we were back on the road! The axle-less system is better than the original manufacturers. If you plan on taking your RV or TT farther than 100 miles GET THIS INSTALLED and get it through etrailer.
Very exicited about these axels, I have been eyeing these for over a year. (Excellent service from etrailer, they had my parts to me in 1 day from the time of placing the order.) These axles seem to be well made and fit nicely with the Dexter hub and drum assembly and the 12" electric brake kit. I installed this all on a M1101/M1102 trailer frame after removing the factory axel assembly. I have not ran these on the road or off as of yet but will give another review at that time. The fit and finish are great and the packaging was good, a little banged up from shipping (missing 1 washer)
Installed the Timbren Axle-less suspension a little over a year ago and approximately 5000 miles ago. I have been extremely satisfied with the installation and performance thus far and have had no issues. I also chose to install an optional crossmember for more strength using a 1/4" thick piece of 2x3 steel. I had to increase the weight capacity of my campers suspension due to renovating the interior completely and adding more weight. I also strengthened the frame to accommodate the extra weight. In addition to installing the Timbren 5200LB system I installed new 12" electric brakes and upgraded to 225/75R15 tires with E load range rating.
Customer service is amazing! Thanks to all of the team at etrailer.
Trailer suspension and disk brake performance is outstanding big big difference over leaf spring and electric drum brakes.
Installation required modifications to the frame to monut the timbren suspension
Installed the Timbren Axle-less suspension a little over a year ago and approximately 5000 miles ago. I have been extremely satisfied with the installation and performance thus far and have had no issues. I also chose to install an optional crossmember for more strength using a 1/4" thick piece of 2x3 steel. I had to increase the weight capacity of my campers suspension due to renovating the interior completely and adding more weight. I also strengthened the frame to accommodate the extra weight. In addition to installing the Timbren 5200LB system I installed new 12" electric brakes and upgraded to 225/75R15 tires with E load range rating.
The trailer rides great down the road and no more worries about saltwater and rusty leaf springs. Not a cheap option but I’m very happy with the setup. When installing, just be sure to measure accurately and have sharp drill bits. A drill press type of guide also helps ensure correct drilling angles. The first picture is of a mounting gusset a local welding shop made. One is needed for each side and necessary to provide needed mounting strength-at least on my trailer frame. Pics 2 and 3 show the mounted suspension on one side of the trailer. Pic 4 shows the suspension on one side of the trailer with the axle attached and a separately purchased disc brake assembly mounted on it. Finally, pic 5 shows a 2” box channel between both suspension assemblies. Independent suspensions would have been nice, but I wanted to ensure trailer rigidity was maintained. So, after one year, so far, so good. It’s all smooth sailing down the highway.
I purchased the 3500 lb. set w/4" drop. Wish they made a 2" drop. Install was fairly easy, but most of your time will be consumed with alignment measurements, acquiring shims, and making adjustments. I was lucky to have a very square trailer frame. However, the "slop" in the all of the mounting bolts (especially, the spindle mounts) is more than the 1/8" window they specify. You will want to preload all bolts before tightening, and then measure for alignment/toe-in. The units are supposed to have camber built-in, but it's not near enough (more shims). Also, this suspension has more travel then the documents indicated. I had to re-mount my fenders 1" higher to keep the tires front hitting. When fully loaded, you might have 1" of travel left. All that being said, the ride is better than I anticipated. It's less bouncy than a torsion axle, and very quiet. If I was building a trailer from scratch, I would use this system, again.
Packaging very good and shipping fast.
Excellent communication and shipment was tracked by company representative.
Product looks great. I had to some leg work to get shipping moved along but otherwise satisfied.
My trailer is an enclosed race car carrier originally built with dual axles and leaf springs. The maximum weight of the trailer and load would be about 5,000lb.
This Timbren product is well engineered, well constructed and does what it is designed to do. Much better system than the dual axle, leaf spring set up.
Installation may me a bit more complicated than the videos or supplied directions indicate. Look at the videos and directions and your trailer and plan ahead. Take measurements, decide on how to reinforce the frame and buy high quality hardware if you plan on bolting everything together.
This Timbren product would be a great choice if you were building a trailer from scratch. Choosing to convert an existing trailer suspension is a more complicated choice. For me it was worth the effort.
Very nice quality, I had to call Timbren with a question very good company to deal with and etrailer is a first class company very good customer service.
Hi Amy,,
I got my order yesterday, it is perfect for what for my off road camper trailer project.
Maybe a little (lot!) Over kill, but where it will be going I don't think over kill is a bad thing.
I have made a lot of purchases from you guys and have never been disappointed.
I will probably need to purchase the hub/break assembly next.
Thanks for everything,
Best axle system for overland trailers and their travels, great independence system for those 1-6 trail ratings, simple to work on , easy bolt on system. I would recommend to grease after each trip . The standard Duty -4" Drop- 4Bolt Flange- 3500 lbs give me about 21" clearance with 35" x 12.5 tires
Gwendolyn Y.
2/6/2025
Hey Alan. I love seeing all your progress pics. However, I think my favorite part is the camper art on the back! Do you have a bucket list location you want to take it to?
Info for this part was:
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Jon
3/15/2024
Nothing has changed. Still working great.