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  1. Trailer Axles
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  5. Spindles Only
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Timbren Axle-Less Trailer Suspension - Standard Duty - 4" Drop - 5 Bolt Flange - 5,200 lbs
Timbren

Timbren Axle-Less Trailer Suspension - Standard Duty - 4" Drop - 5 Bolt Flange - 5,200 lbs

Part Number: ASR5200S04
In Stock
$1,470.81
Trailer Axles
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Get more ground 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" drop spindle lowers deck height for easy loading. Fits any trailer frame width. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension - Standard Duty - 4" Drop - 5 Bolt Flange - 5,200 lbs part number ASR5200S04 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - ASR5200S04

  • 5200 lbs
  • Universal Fit
  • Spindles Only
  • Drop - 4 Inch
  • Rubber Spring Suspension
  • Standard Grade
  • Timbren

Get more ground 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" drop spindle lowers deck height for easy loading. 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 on-road adventures
    • Strong steel construction is built to last
    • Black powder coat resists rust and corrosion
  • Lowers trailer deck height for easier loading and unloading
    • 4" Drop 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: 5,200 lbs
  • Brake flange configuration: 5 bolt
  • Bolt hole diameter: 5/8"
  • Suspension travel: 2-3/4"
  • 3-Year limited warranty


Tire, Wheel, and Hub Compatibility

  • Tire size: ST235/85R16 or smaller
  • Wheel diameter: 16" or smaller
    • This assumes a wheel with zero offset
  • 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 pavement. With 2 independently operating units, you'll get better handling when making tight turns. And because this system eliminates your axle and has drop spindles built in, you'll get a lower deck height without sacrificing 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 and a high deck height. This may make it difficult to navigate rough roads and to load items into your trailer.


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 drop spindles on this setup will also lower your deck height, making loading and unloading your trailer 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" 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 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" 18-3/8" 1-1/2" 6-1/4" -3/8" 5"


Axle-Less dimensions top view

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




ASR5200S04 Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Without Hubs - 5,200 lbs

Installation Details ASR5200S04 Installation instructionsAlternate Instructions ASR5200S04 Installation instructions



Ratings & Reviews

4.6

128 reviews
Get more ground 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" drop spindle lowers deck height for easy loading. Fits any trailer frame width.

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See what our Experts say about this Timbren Trailer Axles

  • Smallest Diameter Trailer Tire with At Least 1,800 Pounds Capacity and Parts for Building a Trailer
    Assuming the trailer is as single axle and only has two tires the smallest we carry is a 205/75-14 size tire. The Kenda # AM10235 measures 26.3 inches in diameter and has a weight capacity of 2,200 pounds at 75 psi. You also want to make sure the wheel has enough capacity. If you can tell me your bolt pattern I can recommend a wheel as well.
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    Hey Adam! You can do what you're wanting but not with two of the Timbren Axle-Less Trailer Suspension item # A35RD545E you referenced. You'll need different hubs those won't work with hydraulic brakes. I have listed below all of the parts you will need to use a Timbren system with a surge brake actuator with free backing drum brakes: 2 - Timbren Axle-Less Trailer Suspension item # ASR3500S04 4 - Dexter Trailer Hub & Drum Assembly for 3,500-lb Axles item # 84546UC3-EZ 2 - Dexter Free-Backing...
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  • Will Timbren Axle-Less Kit Fit in Place of Torsion Axle on 2018 Winnie WD170S
    Hey Rob, thanks for reaching out! The Timbren kits are designed more around the standard trailer setups, so since your Winnie uses the torsion axle the mounts to the frame further under the trailer, you're going to need to get the same type of axle for everything to line up properly. Your best bet is going to be reaching out to a local trailer shop to see if they can custom order you a replacement torsion axle that matches your specs. You can even talk to them about upping the weight...
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  • What would I Need to Upgrade from 3,500 lbs Tandem Axles to 5,000 lbs Tandem Axles
    We carry the Timbren Axle-Less System rated at 5,200 lbs part # ASR5200S01. The axle-less system mounts to your trailer frame and takes the place of your old axle and springs.# ASR5200S01 is a straight spindle design. Timbren also offers these axles with a 4 inch drop spindle part # ASR5200S04. The Timbren Axle-Less can be mount tandem to repalce your tandem axles. There is no need to install leaf springs, because the Timbren axles have built-in spring system on each axle. However, adding...
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  • Can 3,500 lb Axles be Changed to 5,200 lb Axles and Parts Needed
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  • Replacing Existing 3500 lb Axle With a 5200 lb Axle
    When replacing a trailer axle, the spring seat spacing isn't super-critical because you can always relocate those by obtaining new spring seats and having them tacked into place where you need them. The hub face to hub face distance is what's critical. What's the hub face dimension of your current axles? We offer 5.2K axles in the 3 most popular lengths (hub face to hub face) of 86-1/2 inches, 89 inches or 95 inches. • 86-1/2 inch E-Z Lube axle, part # 8327816 for the axle only or # 8327816-EB...
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  • Is an Axle-Less Suspension Available With Air Bags?
    Though there are a number of axle-less suspension systems available for a trailer, there are none that have air bags to allow the trailer to be lowered. There are axle-less suspension systems with a 4" drop spindle to allow for a lower deck height such as # ASR5200S04. I've added a link to a video review of this system for you as well as a link to each of our Timbren systems.
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  • Recommended Replacement Axles for Old Dexter Axle #11 5,200 lb Torsion Axles
    I reached out to my contact at Dexter Axle who said that based off of the numbers you sent in it sounds like you have a #11 Torsion axle rated for 5,200 lbs that is on a Haulmark Trailer manufactured back in 2001 (at least the axle was). Your axle should use 6 lug hubs with EZ-Lube spindles and that it has a 95" hub-face measurement with a 75-3/4" outside bracket measurement (which would be equivalent to spring-center). The closest thing that we have to this is the Dexter Trailer Axle...
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  • Can New 5200-Lb Axles Replace 4400-lb Axles on Tandem Toy Hauler Trailer
    You can change out your toy hauler's axles to higher-rated ones and this will certainly increase the axles' safety margin but it does not necessarily increase the trailer's capacity. The frame and other parts of the overall structure also have to be rated higher than the existing axles in order for you to end up with a higher actual trailer capacity. You can check with Forest River by giving them the trailer VIN number. They can then tell you if the axles are the weakest link and if replacing...
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  • Recommended Hub/Drum Assembly with 8-on-170mm Wheel Bolt Pattern for Off-Road Trailer
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  • Replacement 5,200 Lb Axle for a Hudson Trailer
    I do have an option for you but we do not have a direct replacement for your trailer. Instead, you will want to take a look at the Timbren Axle-Less Trailer Suspension System part # ASR5200S04. This system will actually replace the axle and leaf springs with an aeon spring that will work to absorb road shock and support the trailer's load better than the system you have now. They have the same 4" drop as your current system and you could use your existing backing plates and drums so long...
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  • Timbren Axle-Less Suspension for 10,000 Pound Mobile Hydraulic Lift
    A tow-behind hydraulic lift is going to need to be stable so I recommend using a tandem axle set up just like you mentioned. That would equate to using 2 sets of Timbren Axle-Less systems rated for 5,200 pounds for a total capacity of 10,400 pounds. We have a couple of options in this capacity: # ASR5200S01 has regular spindles; no rise or drop, and # ASR5200S04 has a 4 inch drop spindle meaning that it will lower the trailer by 4 inches. For a hub and drum assembly that will fit these...
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  • Replacing 3500-lb Axles with 5200-lb Axles on Enclosed Cargo Trailer
    You can change out the 3500-lb axles on your enclosed trailer with higher-capacity 5200-lb axles but this will not necessarily increase the weight capacity of the trailer. The trailer manufacturer should be consulted (giving them your trailer's VIN) to allow them to determine if the other components in it, such as its frame, have the capacity to allow you to benefit from increasing the axle rating. Also, it will likely be necessary to change your hubs to ones that are higher rated to match...
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  • Trailer Frame Mounting Space Required for Installing Timbren Axle-Less Suspension System ASR5200S04
    The Timbren Axle-Less Trailer Suspension System # ASR5200S04 that you referenced will require a trailer frame area of at least 14-5/16" inches long and about 3" tall for proper mounting. I have attached a dimensional diagram below with this and other measurements labeled for the setup (just note that the spindle measurement isn't correct since this model features a 4" drop). When mounting to the frame it's extremely important to use all 3 bolt holes provided, so this full length is needed....
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  • Replacement Axle Solution for 1989 Avion Travel Trailer
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