3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift
3500 lb Axle-Less Trailer Suspension w/ 4” Lift

3500 lb Axle-Less Trailer Suspension w/ 4” Lift

SKU# ASR3500S06

FREE Ground Shipping on Orders Over $99

3-Year Warranty

Available to ship within 2 weeks.

Looking for increased versatility for your utility, landscape, or construction trailer? Designing a trailer to have its deck drop down to the ground? Working on another type of light-fit custom or retrofit rig?

Our Axle-Less trailer suspension kits offer ultimate creative freedom for your custom trailer build.

With no through axle, there’s no need to worry about ordering the correct axle dimensions. Shims are also supplied giving you the flexibility to adjust, if necessary, the suspension alignment and camber specific to your trailer frame. And polyurethane bushings — used at the pivot point on the control arm — hold the pin firmly in place, resulting in better stability and a more controlled alignment with each moving component.

Axle-Less trailer suspension features two Aeon® rubber springs, one for jounce and one for rebound, absorbing road shocks and allowing for a quiet, smooth ride, whether on the highway or down a dirt road.

Durable and weather-resistant, these suspensions are built to last in any environment, from the heat of the Outback to the sub-freezing winters of Canada.

Each Axle-Less trailer suspension kit comes with both driver and passenger side to give you a full suspension.

Need something more suited for off-roading and overlanding? We recommend our HD series of Axle-Less trailer suspensions.

Key Features

  • 4” lift outboard arms giving you the maximum ground clearance
  • Standard spindles for use with standard-width tires up to a maximum size of ST215/75R15 *
  • Brake flange included for optional brakes
  • Smooth quiet ride empty or loaded
  • Durable powder coat finish
  • Easy bolt-on installation
  • No thru axle


  • 3500 lb trailer suspension capacity
  • Outboard arms with 4” lift and standard spindles for tires up to a maximum size of ST215/75R15 *

Weights and Dimensions

Choosing A Trailer Suspension

The optimal performance of an Axle-less system is achieved when the average load on the suspension falls within the range of 60 to 80 percent of its rated capacity. For example, a standard ASR35HDS Axle-less suspension with a load rating of 3500 lbs would operate most effectively with an average load between 2100 and 2800 lbs (950 to 1270 Kg).

It is important not to overlook scenarios of maximum load: In addition to the regular weight, consider all sources of extra weight: a full water tank, waste water tank, loaded fridge, generator and any other type of equipment, spare tire, one or two 12V batteries, water hose, power cord, and a propane tank, tent, ladder, tools, etc.

Keep in mind that the load distribution also plays a big role. In the case of a tandem trailer, due to a number of factors (including the height of the hitch, or distance between axles, etc) the load on the front axle could happen to be different that the rear axle. The weight on the left side could also be different from the right side. So one axle or even one corner could potentially be overloaded even if the trailer is not overloaded! Always follow safety guidelines and leave plenty of extra room for weight when choosing your suspension. This isn’t just about safety; it’s also about getting the best ride quality and handling for your trailer.

If you need further assistance in selecting a suspension for your trailer. Please reach out to Timbren’s Customer Service Team.


*Please note that these are the maximum allowable tire sizes for each suspension, not necessarily the most popular or preferred ones for your trailer application. The assumption is that you are using a standard trailer wheel with zero offset.

Each Axle-Less trailer suspension kit comes with both driver and passenger side to give you a full suspension.

What's Included

  • 2x suspensions
  • 2x 4” lift outboard arms with spindles and brake flange
  • Grade 8 zinc coated hardware
  • 8x camber shims

How to Install

3500 lb Axle-Less Trailer Suspension w/ 4” Lift SKU #ASR3500S06

Suspension Capacity

  • 3500 lb

Ride Height

  • 4” Lift

Spindle Arm Length

  • Standard Length

Brake Flange

  • Yes

We offer a 3-year warranty on our Axle-Less trailer suspensions.

Covered under this warranty is the replacement of the failed part. This warranty does not include labor, freight, collateral damage, or any ancillary costs which may arise as a result of the failed part. We retain the right to make our own inspection of the failed part to determine the validity of the claim.

Read more about our warranty policy

FREE Ground Shipping on Orders Over $99

Free ground shipping is available in the contiguous United States on all orders over $99. Normal processing time is between 1 – 2 business days from placing the order.

We make every effort to ship the order within this processing time; however, no guarantees are expressed or implied.


If you’re not happy with your Timbren product, we want to remedy that. If our customer service team can’t find a solution for you, you can return your Axle-Less trailer suspension for a refund within 100 days of purchase. Product cannot have been mounted to your trailer, and return shipping is not covered by Timbren.

Read more about our returns policy

Buy this with

See Our Suspension in Action

See the Specs of Our Axle-Less Design

Our Axle-Less design features our Aeon® rubber spring technology.

A Straightforward Installation: How to Install Axle-Less Trailer Suspension Yourself

Install your Axle-Less suspension in a few simple steps, with just a few tools you already have on hand.

How to Choose the Right Timbren Axle-Less Trailer Suspension

Whether building a custom rig or retrofitting an existing trailer, here’s how to pick the right Axle-Less suspension.

See Our Suspension Go Off-Road

Stay in control of your tow no matter what obstacles you encounter.

Why Axle-Less Suspensions Are the Perfect Fit For Your Utility Trailer

Axle-less suspensions aren’t only for off-roading. Enjoy a smooth, quiet ride for your utility trailer, too.

Better than Torsion, Leaf Spring & Trailing Arm

Axle-Less trailer suspensions are a leader in the industry for a reason — more than one reason, actually.

Axle-Less Trailer Suspension

Torsion Suspension

Leaf Spring Suspension

Trailing Arm Style Suspension






Requires Axle





Improved Ride Quality


Off-Road Capable

Maximum Ground Clearance

Your questions, answered

You want all the info before choosing the right trailer suspension for you. And we want to help.

If you need maximum ground clearance for off-roading, Axle-Less Trailer Suspension is the way to go. If you don’t require ground clearance and want to utilize axles as part of a retrofit, the Silent-Ride Trailer Suspension is your best option.

Learn more about Silent-Ride Trailer Suspension

Axle-Less trailer suspensions are fully independent and do not require an axle, allowing for ultimate control of your rig.

A torsion trailer suspension, on the other hand, is housed within an axle tube and isn’t designed to hold up to the abuse and rigors of off-road or overland travel.

Our jounce and rebound springs are made from natural rubber, with all the unique characteristics that make our Aeon® springs a leader in towing and hauling.

The capacity rating represents one complete Axle-Less trailer suspension (i.e. both sides).

Yes. Some maintenance is required, such as greasing the pivot bushings and wheel bearings.

For detailed maintenance information, refer to the maintenance notes included with the installation instructions.

To begin, you’ll need to make sure the frame is perfectly square. Additionally, some trailer frames require additional support, like an extension plate to allow bolts to be installed vertically. This would eliminate the use of a cross-member, allowing you to achieve maximum ground clearance.

Have questions? Reach out to one of our resident suspension techs about your trailer project to determine whether Axle-Less trailer suspension is right for you.

Talk to a resident suspension tech