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  1. Trailer Axles
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Timbren Axle-Less Trailer Suspension - Heavy Duty - 4" Lift - 5 Bolt Flange - 3,500 lbs

Timbren Axle-Less Trailer Suspension - Heavy Duty - 4" Lift - 5 Bolt Flange - 3,500 lbs

Item # ASR35HDS05
Our Price: $1,253.60
Trailer Axles
Shipping Weight: 151 lbs
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Get more clearance and a smoother ride when towing with Axle-Less trailer suspension. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, 4" lift spindle raises deck height for additional clearance. Fits any trailer frame width. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension - Heavy Duty - 4" Lift - 5 Bolt Flange - 3,500 lbs part number ASR35HDS05 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - ASR35HDS05

  • 3500 lbs
  • Universal Fit
  • Spindles Only
  • Lift - 4 Inch
  • Rubber Spring Suspension
  • Timbren
  • Easy Lube Spindles

Get more clearance and a smoother ride when towing with Axle-Less trailer suspension. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, 4" lift spindle raises deck height for additional clearance. Fits any trailer frame width.


Features:

  • Delivers a smooth, stable, quiet ride - regardless of load size
    • Jounce springs absorb road shock and support trailer's load
    • Rebound springs minimize body roll, rattle, and bottoming out
    • Built-in camber and toe-in reduce wear on your trailer's tires
    • Units work independently - what affects one side of your trailer won't affect the other
  • Eliminates axle beam to increase ground clearance and fit any trailer frame width
    • System replaces 1 trailer axle and suspension components
    • 2 Separate units bolt directly to your trailer's frame
  • Designed for your overlanding or off-road adventures
    • Robust, heavy-gauge steel construction is built to handle abuse
    • Black powder coat resists rust and corrosion
  • Raises trailer deck height for maximum ground clearance
    • 4" Lift spindle is built in
  • Allows for simple bearing maintenance with built-in grease zerks


Specs:

  • Application: single- and tandem-axle trailers that use regular tires
    • Tandem-axle trailers require 2 complete systems
    • Not recommended for triple-axle trailers
  • Quantity: 2 suspension units (without hubs)
  • Weight capacity: 3,500 lbs
  • Brake flange configuration: 5 bolt
  • Bolt hole diameter: 5/8"
  • Suspension travel: 2-5/8"
  • 3-Year limited warranty


Tire, Wheel, and Hub Compatibility

  • Tire size: 235/85R16 or smaller
  • Wheel diameter: 16" or smaller
  • Bearings (sold separately)
    • Inner: 25580
    • Outer: 14125A or 15123
  • Races (sold separately)
    • Inner: 25520
    • Outer: 142376 or 15245
  • Seal: 10-36 (sold separately)
    • 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.


Get more ground clearance and a more comfortable ride when you're towing with Timbren's Axle-Less trailer suspension. This suspension system provides great shock absorption to comfortably get you where you need to go and to protect your precious cargo as you travel - even on rough terrain. With 2 independently operating units, you'll get better handling when making tight turns. And because this system eliminates your axle and has lift spindles built in, you'll get maximum ground clearance.


Timbren Axle-Less Suspension vs. Other Suspension Systems

There are many suspension options for your trailer or camper. So, what makes Timbren Axle-Less different?


Leaf Spring Example

Axle-Less systems are a definitive upgrade over traditional leaf springs, in part because they allow you to do away with your thru-axle, allowing for maximum clearance. As you've probably noticed, having a leaf spring suspension means that your axle will always hang at least a few inches below your trailer's frame, resulting in limited ground clearance. This may make it difficult to navigate off-road terrain.


In addition, while leaf springs do a great job of supporting an even load, they may cause your trailer to bounce and rattle when it's empty or to bottom out with a heavy load. And they don't offer any type of shock absorption for a smooth ride - unless you have upgrades built in. With Timbren's Axle-Less system, gone are the days of dealing with these annoyances - this suspension is designed for a quiet, balanced ride, whether your trailer's fully loaded or empty.


Torsion Axle Example

A torsion axle is a step up in terms of shock absorption, and it provides more clearance than a traditional, leaf spring suspension, but that crossbeam will still hang down some. And if your torsion axle gets damaged in any way, it can't be repaired - you'll have to replace the entire thing with a setup that matches your exact trailer frame width.


With the Axle-Less system from Timbren, you won't have a low-hanging axle beam to get in the way when you want to go off-road. The lift spindles on this setup will also raise your deck height, making navigating off-road terrain way easier. And the rubber springs and independent operation both combine to absorb shock and deliver a smooth, easy ride. In addition, the Axle-Less system can be easily maintained over time, and it will fit any trailer frame width, so you don't have to worry about potentially ordering the wrong size like you might with other systems.


Timbren Silent Ride Example

Another suspension upgrade on the market is Timbren's Silent Ride. This setup is a great option to reduce bounce and rattle because it has the same AEON rubber springs as the Axle-Less system. But the Silent Ride still requires an axle, so you won't get the same ground clearance or low deck height as you will with the Axle-Less suspension.


Timbren Axle-Less Suspension Parts

The Timbren Axle-Less suspension is designed with you in mind. All of the parts work together so you can tow your trailer comfortably - regardless of load size.


Timbren Axle-Less Suspension Parts Diagram

  1. 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.
  2. 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.
  3. The trailing arm with integrated hanger attaches the suspension to the side and bottom of the trailer frame.
  4. The control arm carries the spindle and the hub. It pivots on strong, long-lasting polyurethane bushings that never require lubrication.
  5. The E-Z Lube, 4" lift spindle is simple to grease. If damaged, it can be removed and replaced, saving you both time and money compared to a traditional axle.
  6. 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.

Installing the Timbren Axle-Less Suspension

Measuring Diagram

The first step in installing the Timbren Axle-Less suspension is to make sure that the mounting points for each unit are directly across from each other. The easiest way to measure this is to mark the desired mounting points on your trailer's frame. Then measure the distance between these points and the center of your trailer coupler. These measurements (A and B) need to be within 1/8" to keep your trailer frame square.


Once you have your mounting points lined up, you'll be ready to install the system. Drill 3 holes into your trailer frame at the desired mounting points. Then bolt each unit to the frame with Grade 5, 5/8" bolts (not included).


Keep Your Trailer Frame Square

Because Timbren's Axle-Less system eliminates your trailer's thru-axle, you'll have to find another way to get the crossbeam support that keeps your trailer frame square. You have a few different options to do this depending on your application and how much fabricating you're comfortable doing.


Crossmember Installation

If you're building a trailer, the best option is to begin building with the Timbren Axle-Less in mind and include a crossmember where you want to install the units on your frame. You can also retrofit an existing trailer with a crossmember.


Steel Tubing Installation

If you don't have a crossmember where you want to install the Axle-Less system (and you don't want to add one), pick up a section of 2" x 3" steel tubing from a nearby weld shop. This tubing will serve as a support to keep your trailer square. It will hang only about an inch down from your trailer frame, providing more clearance than a thru-axle.


After you've mounted both of the units to your frame, you'll need to drill 3 holes into the steel tubing and into the built-in, square holes. Then, insert the tubing through the holes and secure it with 3 bolts (not included) on each side.


Reinforcement Bracket Installation

The last option is to fabricate a reinforcement bracket that can be attached to the inside of your trailer frame and to the Axle-Less suspension. It may be a little harder to fabricate a compatible bracket than to mount steel tubing, but you may get additional clearance with this method.


Dimensions of the Timbren Axle-Less Suspension

The following diagrams show measurements taken on the Timbren Axle-Less suspension system.

Axle-Less dimensions front view

A B C D E F
14-5/16" 16-1/8" 1-1/2" 6-1/4" 7-5/16" 5"


Axle-Less dimensions top view

G H I J K L
5-5/8" 6-11/16" 5-3/4" 2-1/4" 3-1/4" 5-1/4"




ASR35HDS05 Axleless Trailer Suspension System by Timbren - 4" Lift Spindle - Without Hubs - 3,500 lbs HD

Installation Details ASR35HDS05 Installation instructionsAlternate Instructions ASR35HDS05 Installation instructions



Customer Satisfaction Score:


Customer Reviews

Timbren Axle-Less Trailer Suspension - Heavy Duty - 4" Lift - 5 Bolt Flange - 3,500 lbs - ASR35HDS05

Average Customer Rating:  4.6 out of 5 stars   (294 Customer Reviews)

Get more clearance and a smoother ride when towing with Axle-Less trailer suspension. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, 4" lift spindle raises deck height for additional clearance. Fits any trailer frame width.

by:

Fast service from etrailer sending me my Timbren kit. They are always very helpful. Unfortunately it looks like UPS mishandled one of the 3 boxes and had to re-tape it all over. I just rcv'd the shipment, so I will have to open the box when I get home and make sure everything is inside. This is no fault of etrailer, just the shipping companies these days.

Etrailer Expert

Jenny N.

11/21/2021

I will have our customer service team reach out to you.



by:

revolutionary. i will never go back to a standard axle ever again. great ride and performance regardless of loading. no need for separate shocks is a real game changer too.



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The axle-less suspension worked very well for my boat trailer. The suspension was easy to attach to the trailer frame and provided a lower profile than the traditional leaf spring and axle system.



by:

The service from etrailer has been great! They have been very helpful through the entire purchasing process. My one star is due to the quality of the product. First, for something as heavy duty as these are, you’d expect better packaging. On arrival, one of the spindles was sticking out of the box and the hand holds were torn on one of the other boxes. I was a little worried what I might find in the damaged box but everything seems to be intact. The disappointing part is the quality of the welds. For the price you are spending on these, I would expect a higher quality of fabrication. There is undercut in the welds that hold the three support plates together and big ol sloppy welds every where else. Unsure of what to do as my trailer has been designed around this suspension system.



by:

Very smooth pull. I'm very impressed on how the trailer pulls. My traditional axle trailer seemed to bounce a lot on the highway which made a lot of noise, but with the Timbren Axle-less that I installed on a new trailer, the trailer is so smooth and way less noise.
Great product.



by:

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.



by:

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.



by:

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.



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:

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.



by:

Purchased 2 sets of the Timbren 1200 Axle-less systems for upgrading the suspension on an older 30' ft glider trailer. Single axle with small (13") tires made towing tough due to porpoising, dragging on drive entrances do to poor flotation; also German made and metric, no repair parts. GVW 2000 lbs equated to bouncy ride.

Dual sets now allow the trailer to ride over bumps and sharp inclines easily, smoothly, little bounce on country roads; porpoising is history. My glider now rides securely, safely, quietly.

Install time 4 1/2 hours (includes head-scratching). Results are outstanding, units are totally solid. Recommend the square tube interconnect, easy and quick - trailer frame was on the light side, so a precautionary fix. Clean look underneath.

Ordered 5 wheels w/tires, very nice.

Helpful neighbor so impressed he ordered a HD single set for his new DIY snowmobile trailer.

Customer satisfaction 100%, from phone order, online support, product information, immediate shipping, install instructions, followup... HIGHLY RECOMMENDED!



by:

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



by:

I rebuilt a 4 x 8 trailer using the Timbren Axle-Less Trailer Leaf Spring Suspension and it works great. I would recommend it to others.



by:

They have more pros than cons, but the second set I bought broke the flat plate that holds the spindle at about 8 months. The steel quality seemed less than I would expect since it basically peeled it back like a pop can as you can see in the pictures. Otherwise I like the clearance and ride. They last 2-3 years where the torsion axles I replaced would wear out in 4 months after driving down rough gravel roads. There is a grade zerk on the underside which I didn't realize until I bought the second set. That would have helped the first set last longer had I known about it.



by:

I put these on an off-road trailer build. They have been fantastic! I've done many miles and they held up great. Highly recommend.



by:

I used these axles in a different way than most would. I needed a trailer that was small, could handle tight switch-backs, carry 600 lbs and be light. I had this idea and as a retired design engineer I saw a great possibility in this axle. I have made four of these trailers now, one as a camp trailer, 2 for trail work for State Parks and one as a utility trailer.



by:

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.



by:

These units install easily, are well made, and perform great! The trailer doesn't bounce around like you see a lot of trailers do while traveling down a bumpy road. I traveled some unpaved roads with no issues. I am certainly glad I went axleless. I installed with 15" tires. Problem is I didn't go big enough.

I intended to install on an existing trailer that I had. Changed my mind and built a new trailer. The new trailer came in heavier than I had planned. 2k pound capacity is now too small. I have to watch what I load the trailer with so I don't over load the suspension. I intend on buying the 3500 pound units when I have the money.



by:

enclosed are pics of trailer and spindle units. I was very happy with the end result,
lowering ez loader trailer 8 inches for hovercraft. the spindle units were well made,
very strong but had some weld repairs as pictures show.i could not set the needed
adjustments till I cleaned up the units with a stone and file. also please improve the
packaging . these heavy units need something better than cardboard for shipping.
they were dislodged from Styrofoam and partially poked holes thru cardboard. but
fortunately no damage there. again im happy with the installation.thank you!!!



by:

I installed these on my single axle travel trailer to replace the axle and leaf springs. Weight savings was a wash with the required steel tube for added stability. I installed on an I-Beam using aluminum plate as a spacer. It took my friend and I 3 days to install everything. The hardest part was rerouting my black pipe propane line. I also had to install it just back of center due to a steel cross beam being in the way of the middle bolt hole. I replaced the brakes and hubs as well as the wheels to match the new hubs.

Overall we've been super happy with this upgrade. The trailer rides a lot smoother. I'm not finding random screws on the floor after a long bump ride.

We decided to do this after our leaf spring broke 2 times, 12k miles between. We were done dealing with a subpar suspension. I probably would not recommend doing this if your leaf springs are working for you. We put a lot of miles on our trailer. We aren't weekend campers.



by:

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.


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  • Can I Use Idles Hubs Instead of Drums on the Timbren Axle-Less Trailer Suspension
    Yes the Dexter Trailer Idler Hub Assembly for 6,000-lb E-Z Lube Axles part # 8-213-51UC1-EZ will work with the Timbren Heavy-Duty Axle-Less Trailer Suspension part # ASR35HDS05. I was able to confirm that they use the same bearings. The reason that they say they are for drums is that typically there are brakes on larger trailers like what the spindles are designed for.
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  • Timbren Axle Less Kit that Can Fit Jeep 5 on 5-1/2 inch Bolt Pattern Hub
    The 3,500 Timbren Axle Less kits like the part # ASR35HDS05 you referenced actually have 6k spindles on them so for hubs you have to go with the higher rated setups which unfortunately don't have any options in the Jeep bolt pattern you need. Could you get by with a lower rated Timbren Axle Less like the part # ASR1THDS03 which is a 2,200 lb axle and has 3,500 lb spindles so the hub you mentioned # 84555UC1-EZ would fit.
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  • Lifted Axle Setup for Trailer with 3,000 lb GVWR
    The Timbren Axle Less kit part # ASR35HDS05 would be your best option as it has a 4 inch lift built into it and has a 3,500 lb capacity. Then for idler hubs the part # 8-213-5UC1-EZ would be a great option which fit this spindle and also have a 6 on 5-1/2 inch bolt pattern.
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  • Are 3,500 Timbren Axle-Less Suspension System w/ Lift Weight Capacities for One Side or Both
    That's a good question, and the weight capacities for the Timbren Axle-Less Suspension Systems are for the set (both sides). Just think of it like a normal axle with a 2,000 lb rating being for the entire axle as opposed to just a single side. So because you mentioned your fish house frame was 2,500 lbs semi-loaded you would definitely need to go with a 3,500 lb system. This application can work, it just installs by bolting onto your frame, though you do need to ensure there is enough...
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  • How to Choose Replacement Axle for Trailer With Mobile Home Axle
    We are going to have parts that will work for you, though the issue is your current mobile home axles; these are designed for one-time use (to move mobile home from Point A to Point B) and should not be used continually so you will need to replace them. In order to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center as in the diagram I have added; the other thing you need...
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  • Hubs for Timbren Axle-Less Trailer Suspension ASR35HDS05
    We do have hubs you can use with the 3,500 lb Timbren axle-less system, with the correct set up being the following: - Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - 3,500 lbs # ASR35HDS05 - Dexter Trailer Hub and Drum Assembly # 8-201-5UC3-EZ This hub comes with the bearings, races, and seal so you won't have to purchase anything else. I have added some links below to video reviews for you to check out as well if you'd like to take a look.
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  • Correct Brakes for the Timbren 3,500 Lb Heavy-Duty Axle-Less Trailer Suspension
    In order to add brakes and hubs/drums to the Timbren Heavy-Duty Axle-Less Trailer Suspension part # ASR35HDS05 you'll need to use the Electric Trailer Brake Kit part # AKEBRK-7-SA and the Trailer Hub and Drum Assembly part # AKHD-655-6-EZ-K which has a 6 on 5-1/2" bolt pattern.
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Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Brian B
Updated by:
Brian B
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Laura H
Written by:
Laura H
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

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