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  1. Trailer Axles
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  3. 3500 lbs
  4. Universal Fit
  5. 5 on 4-1/2 Inch
  6. No Drop or Lift
Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K
Timbren

Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K

Part Number: A35RS545E
$1,140.67
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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 (L68149) and outer (L44649) bearings. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K part number A35RS545E can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - A35RS545E

  • 3500 lbs
  • Universal Fit
  • 5 on 4-1/2 Inch
  • No Drop or Lift
  • Electric Brakes
  • Rubber Spring Suspension
  • Timbren
  • EZ 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 (L68149) 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 hubs (with bearings, races, and seals) and electric brakes
  • 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 and electric brakes)
  • Weight capacity: 3,500 lbs
  • Bolt pattern: 5 on 4-1/2"
  • Bolt hole diameter: 1/2"
  • Suspension travel: 1-3/4"
  • 3-Year limited warranty


Tire, Wheel, and Hub Compatibility

  • Tire size: 235/85R16 or smaller
  • Wheel diameter: 16" or smaller
  • Bearings (included)
    • Inner: L68149
    • Outer: L44649
  • Races (included)
    • Inner: L68111
    • Outer: L44610
  • Seal: 10-19 (included)
    • 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 8, 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
13" 15" 1" 5" 3-13/16" 4-1/4"


Axle-Less dimensions top view

G H I J K L
5-5/8" 6" 4-3/4" 1-3/4" 3-3/8" 3-11/16"




ASR3500S045 Axleless Trailer Suspension System by Timbren - Standard Height Spindle - 5 on 4-1/2" - Electric Brakes - 3,500 lbs

94545LH and 94545RH Electric Brake Hubs and Drums for 3,500-lb Axles - 1/2" Studs - Right Hand and Left Hand






Customer Reviews

Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K - A35RS545E

Average Customer Rating:  4.6 out of 5 stars   (323 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 (L68149) and outer (L44649) bearings.

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See what our Experts say about this Timbren Trailer Axles

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    It is difficult to recommend the best replacement without knowing the trailer capacity but the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - Straight Spindle - 3,500 lbs # A35RS545E would definitely fit. These work with any trailer width and can be bolted or welded on for installation. The one thing you will have to keep in mind is the capacity. At the very least you will not be able to exceed the 3,500 lb capacity of this system. If you know the capacity of other...
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  • Determining Parts Needed To Convert Trailer From Hydraulic Brakes To Electric Brakes
    I would be happy to recommend the parts you will need to convert your trailer from hydraulic brakes with 14" wheels to electric trailer brakes with new 5 lug wheels, but first we will need to determine a few things about the trailer. First you will need to find out which inner and outer hub bearings your trailer uses. There is two ways to accomplish this, with the easiest being pulling on hub off and checking for the bearing number on each bearing. This number is stamped on the face of...
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  • What Replacement Pinions Do I Need for My 3,500 Pound Axle?
    As far as the pinion/spindle, you can replace the spindle itself, but there are a few different options as far as the inclusion of a brake flange, the diameter of the end stub, and whether the spindle is square or round. I went ahead and linked all of the available spindles we have for a 3,500 pound torsion axle. As far as the installation process, you will need to grind/drill the old ones off and weld the new ones onto the axle. If you want an easier solution, I recommend replacing the...
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  • What is Smallest Wheel/Tire that Can Fit 3,500 lb Timbren Axle Less
    I believe the wheel/tire combo you are referencing is the Kenda Loadstar 205/65-10 part # AM3H454 as we have it listed as a direct replacement for Tracker pontoon boat trailers. This would be way too small to fit a 10 inch diameter hub drum. The smallest wheel and tire size that can fit on a 10 inch drum like what comes with the Timbren Axle Less part # A35RS545E is a 13 inch like the # AM31994 which comes with the tire size 175/80R13.
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    For a 2,000 lb axle, the Double Lip Grease Seal - ID 1.249" / OD 1.983" - Qty 1 # 34823 is the most standard size grease seal. You may want to use a digital caliper like # PTW80157 to confirm these dimensions match your hub and spindle. I've attached a video to assist.
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  • Recommended 3500 lb Replacement Axle, Leaf Springs, And Hardware For Pop-Up Camper
    For your pop up camper, I recommend the Trailer Axle w/ Electric Brakes - EZ-Lube - 5 on 4-1/2 Bolt Pattern - 89" - 3,500 lbs # e43SR. You will want to measure to ensure that this is the correct fit with the leaf springs at 74 inches from spring center to spring center. This axle has the brake assemblies and hub and drum assemblies already fitted, so you will just need to assemble and install. For leaf springs, you will want to measure from center of spring eye to center of spring...
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    We have the Timbren Axle Less kit part # A35RS545E which is a 3,500 lb axle setup that like it's name implies does not have an axle that runs from left to right and also comes with hub/drums and brake assemblies. Instead of a leaf spring it has a rubber spring setup.
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  • Axle Replacement For Tracker Trailstar Trailer
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