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  1. Trailer Axles
  2. Timbren
  3. 1200 lbs
  4. Universal Fit
  5. Spindles Only
  6. No Drop or Lift
Timbren Axle-Less Trailer Suspension - Standard Duty - No Drop - 4 Bolt Flange - 1,200 lbs
Timbren

Timbren Axle-Less Trailer Suspension - Standard Duty - No Drop - 4 Bolt Flange - 1,200 lbs

Part Number: ASR1200S04
$753.27
Trailer Axles
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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, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension - Standard Duty - No Drop - 4 Bolt Flange - 1,200 lbs part number ASR1200S04 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - ASR1200S04

  • 1200 lbs
  • Universal Fit
  • Spindles Only
  • No Drop or Lift
  • No Hubs
  • Rubber Spring Suspension
  • Standard Grade
  • Timbren

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, standard-height spindle keeps your deck height the same. 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
    • Spindles accept idler hubs
    • 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
  • Allows for simple bearing maintenance with built-in grease zerks


Specs:

  • Application: single- and tandem-axle trailers that use regular tires
    • Maximum tire size: ST205/75R15
    • Wheel diameter: 15" or smaller
      • This assumes a wheel with zero offset
    • Tandem-axle trailers require 2 complete systems
    • Not recommended for triple-axle trailers
  • Quantity: 2 suspension units (without hubs)
  • Weight capacity: 1,200 lbs
  • Brake flange configuration: 4 bolt
  • Bolt hole diameter: 1/2"
  • Suspension travel: 2-1/4"
  • 3-Year limited warranty


Bearing, Race, and Seal Information

  • Bearings (sold separately)
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (sold separately)
    • Inner race: L68111
    • Outer race: L44610
  • Grease seal (sold separately): 58846
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

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.

Axle-Less dimensions front view

A B C D E F
11-3/8" 13-13/16" 1" 5" 3-1/2" 3-3/4"


Axle-Less dimensions top view

G H I K L
4-5/8" 6" 3-7/8" 3-3/4" 3-1/8"




ASR1200S04 Axleless Trailer Suspension System by Timbren - Standard Height Spindle - Without Hubs - 1,200 lbs

Installation Details ASR1200S04 Installation instructions



Ratings & Reviews

4.7

125 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, standard-height spindle keeps your deck height the same. Fits any trailer frame width.

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See what our Experts say about this Timbren Trailer Axles

  • Finding Replacement Axle For Jet Ski Trailer
    The closest standard axle we have available to the dimensions that you mentioned is the CE Smith Trailer Axle Beam # CE33201GA. This galvanized trailer axle has a spring center measurement of 46-1/2 inches and a hub face measurement of 57-1/2 inches. It has an overall length of 62 inches. Since we do not have a standard axle that meets the dimensions you are looking for, another option is an Axle-Less system like the Timbren Trailer Suspension System # ASR1200S04. This system will provide...
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  • Could The Timbren Axle-Less Suspension Be Used For Tow-Behind-Motorcycle Coffin Trailer?
    Hey Joe, thanks for reaching out. Your coffin trailer idea sounds killer! I was able to find a few pictures of similar trailers on google and a lot of those things look pretty cool so hopefully I can be of some help here. I can definitely see the axle-less suspension being a good option for this application. There would be no way to actually "soften" the ride on the Timbren # ASR2KHDS01 but if you think the 2,000 lb capacity would be too stiff, there is a 1,200 lb capacity option that...
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  • Oil Bath Disc Brakes for Timbren Axle-Less Trailer Suspension
    Hey Donny, welcome back! The # ASR1200S04 uses a 3,500 lb axle bearing combination so for oil bath disc brakes you can use the Kodiak # KOD77FR. Then for the 7k # TASR7KS02 you can use the Kodiak # KOD33FR. Let me know if you need anything else.
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  • Axle-Less Trailer Suspension System for a 600 Lb. Trailer and Boat
    We do not carry torsion axles or an axle with that low of a weight capacity. The best option we have are the Timbren Axle-Less Trailer Suspension System # ASR1200S04. Which are an axle-less option with a 1,200 lb. weight capacity.
    view full answer...
  • Do You Have an Axle that Will Have a Good Ride Quality for a 300-500 Pound Load?
    Hello Joseph, Timbren actually makes an axleless suspension rated for 1,200 pounds # ASR1200S04, but the optimal performance would be when it is loaded at 60-80% so 720-960 pounds. When you are rated too high for your 300-500 pound load it can cause a stiffer ride and will have less effective shock absorption. Since you are looking to not use leaf springs I recommend that you look for a torsion axle. We unfortunately do not carry torsion axles, I know that our friends at Dexter make one...
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  • Recommended Trailer Axle For Haul Master 4x8 Foot Trailer
    Replacing your existing axle with the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 60" Long - 2,000 lbs # 20545I-ST-60-15 or Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs # 20440I-ST-60 will work fine as long as the Hub-face-to-hub-face length is 60 inches and spring-center-to-spring-center length is 48 inches. This will give you a higher capacity axle but you will still be limited to whatever weight capacity the weakest component of...
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  • Parts Needed to Replace Axle on M416 Trailer with 6 Lug Toyota Pattern with Parking Brake
    You'd want the Timbren Axle Less part # ASR1200S04 for a replacement axle solution for the M416 trailer and then for hubs to have 6 on 5-1/2 inch bolt pattern you'd want the part # AKHD-655-35-EZ-K and brake assemblies # K23-086-087-00 which have parking brakes.
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  • Replacement Trailer Idler Hub That Uses L68149 Inner and Outer Bearings and 5-on-4-1/2 Bolt Pattern
    We do offer a range of replacement trailer hub assemblies that use the L68149 bearing as their inner bearing and that have the 5-on-4-1/2-inch bolt pattern. All can be seen on the link at right. However, none of these 16 hubs uses that same bearing as its outer bearing - all use an L44649 outer bearing. You may find it easier to replace the entire axle and hubs with new and readily available items. We do offer axles alone, axles with complete hub/bearings kits and axle-less suspension...
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  • How Much Clearance Is Needed For Tires When Installing Timbren Axle-Less System Under Trailer
    I called my contact at Timbren to get some information for you about the axle-less systems. For the 1,200-lb systems the distance from the center of the spindle to the underside of the frame where the bracket mounts it is 2-5/8 inches. And for these systems they have a deflection of 2-1/8 inches. I have attached a drawing that shows these dimensions you can check out. You will want at least an inch over the deflection distance. There is no hard rule because it depends on the road conditions...
    view full answer...
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  • Can the Axle or Spindles be Replaced on a 1,000 Pound Harbor Freight Trailer
    I do have a solution for you but we have only the most common size straight axles. Also you may be able to remove the spindles on your current axle but any new ones would have to be welded on by a professional with experience with this kind of trailer work. What I recommend is to use Timbren Axle-less system # ASR1200S04. You would use this set in place of a traditional axle and leaf spring suspension. The benefits are better ground clearance, less maintenance, and much fewer parts that...
    view full answer...
  • Timbren Axle-Less Trailer Suspension For A 5x8 Northern Tool Aluminum Trailer
    I have the perfect solution for your 5x8 aluminum Northern Tool Trailer! I would recommend going with The Timbren Axle-Less Trailer Suspension System # ASR1200S04 because the 2,000 pound system is overkill. Using this system will give you 2 independent units that can eliminate the need for a thru axle. It will increase the ground clearance and fit any trailer width. The system has a heavy-duty steel construction that has a black powder coat that resists wear and corrosion. It is easy...
    view full answer...
  • What is the Total Weight Capacity for the Timbren Axle-Less Trailer Suspension System # ASR1200S04
    The 1,200 pound capacity listed for the Timbren Axle-Less Trailer Suspension System, # ASR1200S04, is for the pair.
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  • Comparing 1,200 Lb Timbren Axle-Less Trailer Suspension Systems
    The only difference between the Timbren Axle-Less Trailer Suspension System part # ASR1200S04 and part # ASR1200S02 is that the former has brake flanges so you can install brakes if needed. I have attached options for each setup below. ASR1200S04 - Dexter Hub/Drum part # 8-173-16UC3-EZ - Dexter Trailer Brakes part # 23-47-48 ASR1200S02 - Dexter Idler Hub part # 8-91-05UC1-EZ
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  • Components Needed to Build a Trailer From Scratch with the Timbren Axle-Less System
    I would be happy to help you put together the components you need to build your own trailer and do my best to keep the weight down. You are off to a good start with the Timbren Axle-Less Trailer Suspension System - Spindle w/Brake Flange item # ASR1200S04. These weigh around 50 lbs. However, the brakes you linked item # 23-48 are for 7" hubs and we do not have any that will fit the Timbren systems so you will need to go up to 10" hubs and drums. I recommend the Dexter Trailer Hub and...
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  • Trailer Axle Recommendation for an ATV Trailer
    For an offroad trailer like you described I would recommend a Timbren Axle-Less system like the part # ASR1200S04 would be a great choice. This is a 1,200 lb axle that depending on how much you plan on towing in the trailer might be more than enough by itself and wouldn't require a second axle. This system comes with the suspension and the spindle all together. Also, this system will give great ground clearance since there doesn't need to be an axle running between the two sides.
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  • Solution to Have 6 Lug Bolt Pattern on M416 Trailer
    Hey Sean, we don't have any hubs that fit the spindles on your M16 trailer axle but we can help with a new axle setup. You'd want the Timbren Axle Less part # ASR1200S04 for a replacement axle solution for the M416 trailer and then for hubs to have 6 on 5-1/2 inch bolt pattern you'd want the part # AKHD-655-35-EZ-K and brake assemblies # AKEBRK-35-SA.
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  • Replacement Axle and Suspension System for Small Boat Trailer
    I have a set-up that may work for you, but unfortunately we do not have exact matches for the parts you are looking for. Since the number of leaves doesn't directly relate to the capacity, the main concern when choosing leaf springs is the length of the spring. The only 26 inch long leaf-spring we have is a 6-leaf spring for 4,500 pound axles, # e27SR. We do not carry any galvanized axles, and none of the common axles that we carry have an overall length of 54 inches. The best solution...
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  • Recommended Brakes and Hubs for a Timbren 1.2K Axle-Less System
    Hey Drew, for the Timbren Axle-Less Trailer Suspension # ASR1200S04 you can use the etrailer Electric Trailer Brakes # AKEBRK-35-SA for brakes, and # AKHD-545-35-EZ-K for a hub and drum assembly.
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  • Selecting Timbren Axle-less Trailer Suspension for Teardrop Trailer with Maximum Weight of 1200-lbs
    If your trailer's maximum fully-loaded weight will be 1200-lbs then you can use one of the 1200-lb-rated Timbren kits shown on the linked page. These are available with or without a choice of idler hubs. One kit include brake flanges in case you want to add brakes in the future, kit # ASR1200S04. The kits rated for 2000-lbs could still be used but you'd find the ride to be a bit rougher since they'd be operated well below their maximum capacity. Their extra stiffness would make the trailer...
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  • Can a Timbren Axle-Less Suspension Be Added To a Single Axle Trailer Creating a Tandem Axle Trailer?
    I do not recommend converting a single axle trailer to a tandem axle by adding the Timbren Heavy-Duty Axle-Less Trailer Suspension # ASR1200S04. This will give you 2 different suspension systems that will not work correctly together. Since your current suspension will react differently than the Timben suspension. If you have a straight axle that is mounted with leaf springs a system like the Timbren Silent Ride Suspension # TSR4000T03 would be the one I recommend. This particular system...
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  • Timbren Axle-Less Trailer Suspension System for Regular Tires
    Yes, there is a Timbren system for standard tires. You are wanting the Timbren Axle-Less Trailer Suspension System - Spindle Only lbs item # ASR1200S04 for regular tires.
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  • Hydraulic Drum Brakes and Hubs for the 1,200 lb Timbren Axle-Less Trailer Suspension System
    We actually do have a Timbren Axle-Less Trailer Suspension System rated for 1,200 lbs that comes with a brake flange. It is listed on our site as part # ASR1200S04. With this system you can use the Hydraulic Trailer Brake Kit # AKFBBRK-35 along with the Dexter Trailer Hub and Drum Assembly # 84546UC3-EZ. These are rated for a 3,500 lb axle but will fit on the 1,200 lb axle-less system. If you don't already have brake lines then I also recommend using the Kodiak Hydraulic Brake Line Kit...
    view full answer...
  • Axle Less System For A Motorcycle Sidecar
    No, The Timbren Axle-Less Trailer Suspension System # ASR1200S04 comes with 2 pieces. You're not able to purchase 1. You will have to purchase the whole kit. This suspension system provides a safe, smooth, quiet ride for your trailer. The two independent units can eliminate the need for a thru axle which will increase the ground clearance and reduce roll during cornering. The kit has a heavy-duty steel construction with a black powder coat finish that resists wear and corrosion. The...
    view full answer...
  • Will Trailer Hub and Drum AKHD-545-2-2K Work with 7 Dexter Brake Assemblies?
    Yep! The trailer hub and drum # AKHD-545-2-2K you were looking at is compatible with 7" Dexter brakes like the # 23-47-48. In addition these are both compatible with the Timbren 1,200lb Axle-less # ASR1200S04 you're wanting, and you'll be good going with a 12" wheel with a 4.80-12 tire like the # AM30670 you had been looking at as well.
    view full answer...


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