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  1. Trailer Axles
  2. Timbren
  3. 2000 lbs
  4. Universal Fit
  5. 4 on 4 Inch
  6. No Drop or Lift
Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs

Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs

Item # A20RS440
Our Price: $840.97
Trailer Axles
Shipping Weight: 68 lbs
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Get more clearance and a smoother ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Includes inner (L44649) and outer (L44649) bearings. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs part number A20RS440 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - A20RS440

  • 2000 lbs
  • Universal Fit
  • 4 on 4 Inch
  • No Drop or Lift
  • Rubber Spring Suspension
  • Idler Hubs
  • Timbren
  • Easy Lube Spindles

Get more clearance and a smoother ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Includes inner (L44649) and outer (L44649) bearings.


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 on-road adventures
    • Strong steel construction is built to last
    • Black powder coat resists rust and corrosion
  • Keeps trailer deck height the same while increasing ground clearance
    • Standard-height spindle is built in
  • Includes idler hubs with bearings, races, and seals
  • 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 (with hubs)
  • Weight capacity: 2,000 lbs
  • Bolt pattern: 4 on 4"
  • Bolt hole diameter: 1/2"
  • Suspension travel: 2-7/16"
  • 3-Year limited warranty


Tire, Wheel, and Hub Compatibility

  • Tire size: 235/85R16 or smaller
  • Wheel diameter: 16" or smaller
  • Bearings (included)
    • Inner: L44649
    • Outer: L44649
  • Races (included)
    • Inner: L44610
    • Outer: L44610
  • Seal: 10-9 (included)
    • Inner diameter: 1.500"
    • Outer diameter: 1.987"

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 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.


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 pavement. With 2 independently operating units, you'll get better handling when making tight turns. And because this system eliminates your axle and has standard-height spindles built in, you'll get more clearance without having to raise your deck height.


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 rough roads.


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're driving on rough roads. The standard-height spindles on this setup will keep your deck height the same, so you'll get that extra clearance and still be able to easily load and unload your trailer. 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 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 2" 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, 1/2" 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 2" 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 without hubs.

Axle-Less dimensions front view

A B C D E F
11-3/8" 13-13/16" 1" 5" 3-7/8" 3-3/4"


Axle-Less dimensions top view

G H I K L
4-5/8" 4-7/8" 3-7/8" 3-3/4" 3-1/8"




ASR2000S01 Axleless Trailer Suspension System by Timbren - Standard Height Spindle - 4 on 4" Hubs - 2,000 lbs

88440-2 Timbren Idler Hub Assemblies - 1/2" Studs - Quantity 2






Customer Reviews

Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs - A20RS440

Average Customer Rating:  4.6 out of 5 stars   (287 Customer Reviews)

Get more clearance and a smoother ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Includes inner (L44649) and outer (L44649) bearings.

by:

The parts and prices are great but really for me was Kate Answering my questions and following up later to make sure everything was fine. Hands down best customer service experience I have ever had I don’t see taking my business anywhere else.

Bobby

8/4/2023

This was the best upgrade I’ve made to just about anything really, any trailers I buy in the future will get the timbren suspension.



by:

I used these parts to build a motorcycle trailer. (See attached pictures) It pulls and handles like a dream. The Atwood coupler and the Timbren axle-less suspension are both very well designed and of high quality manufacture. I would recommend these parts to anyone.

Redbone

2/11/2018

I love this suspension. Even empty, the trailer huggs the road and doesnt bounce around. Its smooth as silk when loaded.



by:

excellent product, works so well. needed to lower the motorcycle trailer, and a standard axle was going to place the height of the trailer bed too high. the ride is awesome and the install was simple.

i ordered on a tuesday night and had thursday afternoon. great service

C M.

4/22/2020

excellent- highly recomend, needed to lower height of motorcycle trailer and increase width so can easily carry three motos now.... over 4500 lbs !! handles great, no issues directions and install was a breeze !



by:

Everything was as advertised! Fast shipping and well packaged! And good quality.
And the best part, they respond very fast to my emails!! very nice! Don't think all be using my local retailers anymore.



by:

easy to install, works well.



by:

Very nice product and fast shipping, good price



by:

great customer support and help, wonderful advice. fast shipping and the best - great value for the dollar



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by:

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:

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:

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:

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:

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:

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:

Pleased with ETRAILER, will order here again. Not as happy with the torsion axle setup. 2 inch square opening for tying both axles together with your own 2" square tubing are not shaped to match 2x2x1/8 tubing. Grinding and welding of tubing required to make it fit. Also found the overslung stub axle left the end of the pivot arm without much ground clearance though the unit was intended and spec'd for atv tire off road use. A pivot arm with mounting pads top and bottom would be better and allow the user to choose high or low clearance use. I found the units were perfectly suited to offroad use once I fabricated new mounting pads and welded them to the bottom of the arms.



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:

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:

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:

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:

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:

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.



by:

Needed a suspension system that I could make a low profile kayak trailer, that would fit in a specific area next to my garage. These were excellent that I could make the trailer any width I wanted. Easy to install and well made.


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See what our Experts say about this Timbren Trailer Axles

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    We don't have an axle compatible with center of spring to center of spring dimension of 42 inches. We do however have an axle-less system that will work. I recommend the Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs # A12RS440 or the 2,000 lb capacity system # A20RS440. This will replace your leaf spring suspension and give you the 4-on-4 idler hubs. It will bolt directly to your trailer frame and give you greater ground clearance because...
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  • Amount of Spring Deflection of Timbren Alxe-Less Suspension # A20RS440
    You are correct, the Aeon spring does indeed function as a dampener, and should not need additional dampening. Each unit is rated at a 1000 lb capacity, so two sets or four units would provide a 4000 lb capacity. The 2-5/8 inch dimension shown is the static position, but this exact dimension will depend on the construction of your trailer and how heavy it is. The engineering folks at Timbren tell me that the springs are capable of 2-1/2 inches of travel or deflection.
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  • Is the Timbren Axle-Less Trailer Suspension System a Good Choice for a Motorcycle Trailer
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    I called my contact at Timbren about the Axle-Less Trailer Suspension System with Hubs, part # A20RS440. I have attached a photo of a # A20RS440. The arrow on the photo is pointing to the 2 inch x 2 inch hole that is designed to be used to add additional support if needed. They told me that you should use 1/4 inch thick walls for the 2 x 2 channel.
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    Yes, when you purchase the Timbren Axle-Less Trailer Suspension System like part # A20RS440 both sides are included in the package. This system has a 2000-lb weight capacity and includes the EZ Lube spindles with the bearings, races, and seals.
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  • How Well Do Timbren Axle Less Systems Work as Replacement for Pop Up Campers
    Yes, a Timbren Axle Less kit like part # A20RS440 would work well on your pop up camper trailer. These are similar to torsion style axles which are commonly found on pop ups like yours. This specific kit is a 2,000 lb axle with hubs that have a 4 on 4 inch bolt pattern which is a very popular pattern on campers as well. If your wheels instead have a 5 on 4-1/2 inch bolt pattern you'd want the part # A20RS545. These kits have the advantage of giving the trailer better ground clearance...
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  • Recommended Replacement Axle for Custom Width Trailer
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  • Replacement Axle Option For a 2006 Yacht Club Trailer With 80" Wide Frame and 91" Hub Face
    While we do not have a traditional trailer axle which matches your dimensions we do have the Timbren Axle-Less Trailer Suspension w/ Idler Hubs. This is available in a 4 on 4" # A20RS440 or 5 on 4-1/2" # A20RS545 bolt pattern. The system will bolt to your trailer frame and includes a rubber jounce bumper system to replace your leaf sprung suspension. Both systems are rated for a trailer up to 2,000lbs and include the EZ-Lube spindles to make filling your hubs with grease easier. The hub...
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  • Replacement Axle and Hubs for Small Boat Trailer that Used Super Lube Hubs
    We don't currently carry Tie Down products, but based on my research it looks like the only difference between the Super Lube Hubs and a standard trailer hub from any other manufacturer is that there is a grease fitting built right into the hub itself. This simply allows you to easily add grease to the hub and bearings for regular maintenance. As long as you make sure the hub uses bearings that will fit your trailer spindle, there is no reason you couldn't use a Super Lube Hub on a different...
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  • Replacement Axle and Tire/Wheel Combo for 1969 Boat Trailer with 5.70-8 Tires
    If the axle, spindle, and hub is original on your 1969 boat trailer then it likely has an outdated bolt pattern since you're not measuring 4" across center to center, and is why you're having issues finding something that works. Since it's unlikely that you'll find something compatible it would be easiest to replace the axle and go from there. We have some standard fitments in the linked selection but you also might be interested in our Timbren Axle-Less Trailer Suspension kits like part...
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  • Replacement Axle For a Small Boat Trailer With an Overall Length of 54
    While we do not have a traditional axle we do have the Timbren Axle-Less Trailer Suspension # A20RS440. This is designed as an axle replacement system which also replaces the suspension. This will mount to the frame rails and positions the hub face 4-7/8" from the frame and the center of the axle tube is 3-7/8" below the frame. The system is rated for 2,000lbs. If you need different weight capacity or height please let me know and I can see what system we might have as a replacement. Otherwise...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
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Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
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Wilson B
Employee Kristina F
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Kristina F
Employee David L
Written by:
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Employee Randy B
Installed by:
Randy B
Employee Zach D
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