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

Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 5 on 4-1/2 - 2K

Item # A20RS545
Our Price: $750.30
Trailer Axles
Shipping Weight: 72 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 - 5 on 4-1/2 - 2K part number A20RS545 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - A20RS545

  • 2000 lbs
  • Universal Fit
  • 5 on 4-1/2 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: 5 on 4-1/2"
  • Bolt hole diameter: 1/2"
  • Suspension travel: 2-7/16"
  • 3-Year limited warranty


Tire, Wheel, and Hub Compatibility

  • Tire size: 195/75R14 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 drop 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.

Axle-Less dimensions front view

A B C D E F
11-3/8" 13-3/4" 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 - 5 on 4-1/2" Hubs - 2,000 lbs

88545_2 Trailer Idler Hub Assemblies - 1/2" Studs - Quantity 2





Customer Satisfaction Score:


Customer Reviews

Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 5 on 4-1/2 - 2K - A20RS545

Average Customer Rating:  4.6 out of 5 stars   (300 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:

It is important to know that your wheels are going to sit very tight to the trailer frame. I needed to add an extension to the hub for it to clear the sides of the camper I built.

Matthew

4/21/2024

This suspension is rated for 2000 lbs, and my trailer weighs in at 1600 lbs. After about 30,000 miles though, elastic bumpers where basically flattened out. Good news is that these are super easy to replace, but bad news is that Ill be replacing the whole system with the 3600 lb system. Im guess that the bouncing on the suspension, even with a trailer that was under spec, exceeds the 2000 lb rating. So, the short story - these systems arent rated to the weight of your trailer, but the force of your trailers bouncing. Extra bad news - each of the Timbren systems are different sizes. The arm in this new one is longer, the distance of the hub from the suspension arm is greater, even the holes for mounting it are different spaces. So, it aint like you can just bolt on a different Timbren. Since the fenders on my camper are fixed, Ill be welding a plate over the existing drill holes and drilling new ones. I wish I had known before I purchased the first suspension system that the rating isnt about trailer weight. Still, the folks at etrailer have been super nice through the whole process.



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:

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.

Etrailer Expert

Sierra K.

7/7/2021

Really cool work!



by:

My only complaint is that I had to strip off the bad paint job, grind the sharp edges and apply real primer and paint. The factory paint was crap. I completed the build and have yet to load up the trailer to see what it can carry.



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:

This suspension system did EXACTLY what I wanted. I replaced the leaf springs, axle/hubs on my small trailer. The new suspension improved the capacity, lowered the bed 4+inches, improved ground clearance and allowed me to rebalance the trailer all WITHOUT having to have any welding done. Everything needs to be measured very exactly and the alignment technique is fairly cumbersome and takes a bit of time. In the end, I have a quiet, steady, strong, low riding trailer. What more could you ask for



by:

So far great! I used one of the Timbren Axles in a mountain trail camp/SAR trailer I just finished building. I have only had the trailer on roads because all the trails I want to try it on are still under snow...but it is melting fast. I have included a couple of photos.



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.



by:

Very easy to install, rides and tracks really good! I highly recommend these axles



by:

Two of the holes need to be offset about a half inch from each other for bolts to fit proper. The middle hole on the side and the back Hole on the flat are in line with corresponding holes and hard to get bolts in both. Had to redrill the two.



by:

Very well made and love the ride compared to regular leaf spring axles.



by:

The spring part seems weak. It has held up so far. Drove 3000 miles 1500 with a load of about 1200 lbs. Handles well on hiway but off road, like my gravel sandy clay road with wash boards, cattle guards and bumps, uneven terrain yet not serious off road altogether, the things are tipping at times and slowy becoming lower and less travel. Occasional the entire trailer bounces in air. These will need replacement before too much longer and seem a bit weak over all. Nice quiet sound and overall great but just not heavy enough to hold up off the smooth hiway



by:

I think this is a great product, the holes on the sides could be a little bit higher, I had to double up the frame area for strength and the bolt holes were to low .



by:

Very well made ( thickness of steel, welding, overall construction, all the hardware for installation ) Installation very simple. Great product.



by:

I am not a mechanic so Brandi was real helpful. Had to get some professional help to remove the old suspension and install the new suspension. The only drawback we ran into was the spindle did not extend out far enough to mount the tires in the normal way. We had to put the tires on backwards. It all worked out beautifully. Towed the trailer for over 1700 miles without any problems. Brandi was delightful to talk with and very patient with me. Her help was most appreciated. Sorry, I didn't take any pictures.

R C.

12/19/2021

good



by:

They worked perfect for my flat load motorcycle trailer. Been to Texas twice and Tennessee.



by:

Always great help from e trailer helping me find what I need



by:

not happy with one lug nut missing threads!!! but I think they also could supply the wedge plate! the horizontal holes never change and the lower vertical should be slots. for the money I shouldn't have to make a plate.



by:

Installed these axels on Custum boat trailer to fit on top of our Jeep... worked perfectly
Thanks



by:

Only axle I could find to fit my application. Very cool product. Fast delivery. Easy instructions



by:

This is my first time in building something like this



by:

This is my favorite suspension system in all the world! Rides like an absolute dream. Easy to set up and install. Works on any trailer frame size.

One thing to know: You don't get the ride height you get with a standard leaf spring suspension. Even with 15-inch wheels, the ride height is pretty low - maybe 10-12 inches of ground clearance to the bottom of the main trailer frame. If you need more ride height, get the lifted version.

A few areas of possible improvement? It's difficult to bolt the suspension unit to a crossmember using the middle bolted hole, which uses a tacked-on weld nut. You have zero room for error when drilling the hole through your cross member, and you can't really use the suspension as a template.

Hmmm ... also, the hanger plate mounting holes are positioned 1-inch from the bottom of the trailer frame. That makes it very difficult, since I use channel side rails, to use standard 1/2-inch USS or SAE washers on the backside. There isn't room. Just an extra 1/4 of a inch would allow me to use standard washers underneath the nuts on a channel frame.

Nitpicking aside, it's amazing.



by:

etrailer does not provide sufficient information for a customer to correctly choose wheels / tires for this item, so while the suspension looks great and I'm looking forward to using it, I ended up with the wrong wheels/tires: specifically, this will NOT work with 14" zero offset rims (which is almost all of them). I got an RA on the wheels which guess what I can't use it because the only reason I know they don't work is I mounted them so I've wasted DAYS of my time with no progress on my trailer and STILL do not have a confirmed answer that if I buy X rim it will work with these despite writing to the person who helped me place the order days ago and no answer. This is really not what I expected I'm pretty wildly unhappy at being ignored.



by:

easy install and worked perfectly for my application



by:

How can I discourage you from buying this product? Almost a $500 item, yet they can't supply you the 6 bolts to attach it to the frame. Get to the hub assembly, and another simple, but hard to find item a "tang washer" is not supplied. The 4 bolts to attach the square tubing is also not supplied, but expected that because they were very clear the tubing was not included. Of course, I expect this review will never be seen.


25
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    view full answer...
  • Is Timbren Axle-Less Suspension Capacity for the Whole System or Each Side
    You are right; Timbren Axle-less suspension systems are perfect for your application! The 2,000 pound capacity of Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Regular Tires - 2,000 lbs Item # A20RS545 is for the whole system so each half is rated for 1,000 pounds. If you need more capacity we have # A35RS545 rated for a total of 3,500 pounds. And up from there is # ASR5200S01 which is rated for 5,200 pounds total but it doesn't come with hubs. For compatible hubs...
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  • What Are The Dimensions Of The # 42 E-Z Lube Spindle TRU37FR?
    There is not a Cad drawing of the #42 E-Z Lube Spindle w/ Flange for 5.2K to 7K Trailer Axles - 2-1/4" Diameter # TRU37FR available, but I did include a diagram showing all of the dimensions. It is recommended to have a an axle shop weld the spindle on as they will have all of the required tools and fixtures to square the spindle perfectly to the trailer.
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  • Option For Suspension if no 2,000 lb Axle Meets Measurements
    Hi Jonathan; we do not offer an axle in the dimensions you have, so you have a couple options. One is to have an axle fabricated for you, with the other option being the 2,000 lb Timbren Axle-Less Trailer Suspension w/ Idler Hubs # A20RS545. This is an independent suspension that doesn't use an axle beam, and bolts to the frame.
    view full answer...


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