bing tracking image
  1. Trailer Axles
  2. etrailer
  3. 3500 lbs
  4. 89 Inch Long
  5. 74 Inch Long
  6. 5 on 4-1/2 Inch
Trailer Axle w/ Electric Brakes - Easy Grease - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs

Trailer Axle w/ Electric Brakes - Easy Grease - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs

Item # e43SR
Our Price: $484.34
Trailer Axles
Shipping Weight: 96 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
Trailer axle measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals, and mounting hardware. Easy Grease spindles for simple lubrication. Great Prices for the best trailer axles from etrailer. Trailer Axle w/ Electric Brakes - Easy Grease - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs part number e43SR can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (111)
  • Q & A (0)
  • Photos

etrailer Trailer Axles - e43SR

  • 3500 lbs
  • 89 Inch Long
  • 74 Inch Long
  • 5 on 4-1/2 Inch
  • No Drop or Lift
  • Leaf Spring Suspension
  • Electric Brakes
  • etrailer
  • Easy Lube Spindles

Trailer axle measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals, and mounting hardware. Easy Grease spindles for simple lubrication.


  • Round axle beam acts as part of your trailer's suspension system
    • Replace an axle on your trailer
    • Fabricate a suspension to fit your application
  • High-strength steel construction
  • Bend in axle creates zero camber angle for even road-to-tread contact across the width of your trailer's tires
    • Best for straight-line acceleration and steady, controlled towing
  • Underslung design - spring seats welded to underside of axle for mounting leaf springs (sold separately)
    • Low ride height makes it easier to load and unload your trailer
  • Straight, Easy Grease spindles - no drop
    • Patented welding process prevents spindle failure with 40% stronger welds
    • Built-in grease zerk for simple lubrication
  • Spring seats and spindles are welded on
  • Electric brakes are easy to install - no actuator or hydraulic lines necessary
    • Requires periodic manual adjustment
    • Includes adjuster plugs, mounting bolts, and hardware
  • Cast iron hubs are sturdy and durable
    • Pre-greased hubs with bearings, races, seals, and lug nuts - no need to pack bearings
  • CSA , QAI , and SAE-N certified
  • Lifetime technical support from the experts at


  • Weight capacity: 3,500 lbs
  • Hub-face-to-hub-face length: 89"
  • Spring-center-to-spring-center length: 74"
  • Hub bolt pattern: 5 on 4-1/2"
  • Drum dimensions: 10-15/16" diameter x 2-11/16" wide
  • Grease cap flange diameter: 1.988"
  • Wheel stud dimensions: 1/2" diameter x 1-1/4" long
  • Axle diameter: 2-3/8"
  • Wheel size: 13" to 15"
  • Limited lifetime warranty

Bearings, Races, Seal Information:

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

Axle Dimensions

Hub Face and Spring Center Measurements on Standard Trailer Axle

There are multiple ways to measure the length of an axle beam, but the hub-face-to-hub-face and spring-center-to-spring-center lengths are the most accurate. Hub face (A) refers to the length of the axle measured from the base of one wheel stud to the base of the wheel stud on the opposite side of the axle (when hubs are mounted on the beam).

The spring center (B) is the approximate width of your trailer. It is measured from the center of the spring seat on one side of the axle to the center of the seat on the other. This axle beam comes with the spring seats welded on.

If you are replacing your trailer's axle, you should be able to figure out which type you need by determining your trailer's capacity, the bolt pattern of your wheels, the brake type and the aforementioned lengths.

Note: Axle does not come fully assembled.

Pre-Greased Hubs

A trailer hub with the grease cap taken off shows greased bearings

The pre-greased hubs in this kit come with the bearings, races, and seals already installed, which makes for a faster install time and less mess to deal with. After you've put on the grease caps and lug nuts (included), you'll be ready to roll.

etrailer Axles

etrailer axles are made of high-strength steel and come with spindles and spring seats welded on. The spring seats are attached to the underside of the axle so that the leaf springs (sold separately) can mount beneath the axle. The result of this underslung design is a trailer that rides a bit lower for quick and easy loading and unloading.

Each axle is manufactured to create a certain camber angle. This ensures that the angle of the wheels is correct for your towing needs. Because the primary concern when towing is maintaining controlled, in-line movement, each axle is made so that your trailer's tires will run along the pavement evenly, with contact across the width of the tread. The result is excellent straight-line acceleration for steady, in-line tracking. You might notice the bend near the center of the axle; this is what ensures the proper camber angle. Having the center ride a bit higher and the sides of the axle bent lower allows the axle to give just enough to compensate for the load.

Thoroughly Tested for Safety

This hub-and-drum assembly meets the requirements for certification by the Canadian Standards Association (CSA). The CSA creates standards, which when complied with ensure a safe and quality product. This assembly underwent extensive testing to measure stopping distances when braking. This assembly has also been tested by QAI Laboratories for braking performance in a complete automotive setup and under real-world conditions to provide the most realistic scenario for the everyday driver.

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: 8 on 6-1/2 means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: 5 on 4-1/2 means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Bolt Pattern - Side

Measuring the distance (D) from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

BS35RUW89.00074.000 etrailer by AxleTek 3,500 lb Axle Beam - 89" Hub Face - 74" Spring Ctr

B10E-21 10" Electric Brake Assembly for 3.5K Axle - Left Hand

B10E-22 10" Electric Brake Assembly for 3.5K Axle - Right Hand

19-100 Hub-Drum Assembly Compl Boxed - 3.5K - 5 on 4.5 - PG EZ

Customer Reviews

Trailer Axle w/ Electric Brakes - Easy Grease - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs - e43SR

Average Customer Rating:  4.6 out of 5 stars   (111 Customer Reviews)

Trailer axle measures 89" from hub-face-to-hub-face and 74" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals, and mounting hardware. Easy Grease spindles for simple lubrication.


etrailer is the best. I've been dealing with them for years. The orders are always right. The products are top-of-the-line.
Delivery was fast and free.. I have ordered online and I have called and spoken to the sales staff there who were very helpful and knowledgeable about their products. If you have trailers and you don't give a trailer look, you are missing out.


looks like exactly what I needed, It is always challenging to find trailer parts, so many different types and sizes, the web listings and videos made it very simple, the items arrived very quickly. everything fits properly.

Very Happy!!


Was sent an 83 inch axle.


The axle fit perfectly. No instructions but not the first axle I've changed. Backing plate assembly should be pack a little better to keep them from being knocked around. Stellar service, fast shipping. Thanks


Everything was as described. Good products and fast shipping


Good quality, quick delivery, everything fit as expected. Thank you again, etrailer!


Exact fit fast shipping will always go to for all my trailer needs from now on


I just received the package today and it looks like it is going to make this into a great trailer.





by: 12/02/2022


I ordered two axles to upgrade my trailer capacity to what the frame is rated for, 12,000lbs. The axles have great bearing seats and backing plate studs. The backing plates are fully assembled and ready to connect to the wires already installed into the axle tubes. The hub assembly went smooth and only one set of break shoes needed adjustment. A good buy along with the 5 fully assembled tires and wheels.


I used these axles to upgrade my travel trailer suspension.they Seem to be a good quality item. Good paint job on the axles. Compared to axles that came with the travel trailer. Which helps living on the coast.


Exactly what I ordered packaged nice and pregreased bearings.


Great value. I upgraded a 3500lb trailer and with the added brake it really helps. I use it to haul tools around so it handles the weight much better. Towing is a breeze now. Installation was easy as well. I will be buying more axles and parts in the future.


Aside from not received complete order the first time, I will still recommend etrailer for all your needs


Everything was going great on my new axle install today, until it wasn't. You shiped me the wrong lock washers for the brake backing plate. The correct nuts but the washers are to small. I'll have to pick them up because the customer is expecting the with to be done be today.


Best thing I did was change axles to these. Went from 3500lb to these 7000lb with brakes on both. Tows and stops incredible.


I was worried about ordering trailer parts from a new company online. Product showed up fast and on time. Beat most other product pricing. A courtesy email was sent when product was delivered, making sure I was satisfied, giving me a direct contact incase I had any issues.
I haven't used the product yet but everything looks good.
Will order trailer product again in the future.


I wish I could give negative stars. My order arrived on time, but it was the wrong axle. The axle I ordered and paid for was a 3500 lb drop axle with electric brakes, they sent a bare 3500 lb drop axle. $[XX] difference. I immediately contacted customer service who required pictures of what I received. When I supplied them, they did not respond and even removed my order from their website so I can't track it to see if they're trying to make this right. They won't answer emails either because Ive sent a few. I'll try to get my credit card to refund me since they won't respond.


The axle seems good. Nice that the ball bearings were grease. We will see over the miles if all goes well. The delivery, besides the break assembly was quick. Not sure why the break assembly was not shipped with the rest.


Piece of cake to install. Pull out the old snapped axle install new axle. Bearings come pregreased.


Super fast shipping, excellent packing to protect the product. I have not opened all the boxes yet but plan to work on the install in the morning.

Show More Reviews

See what our Experts say about this etrailer Trailer Axles

  • Will Replacing Axles with Higher Rated Axles Increase Trailer Weight Capacity
    You can increase your trailer axle weight capacity by swapping out your tandem 3,500 lb axles for higher capacity axles like ones rated for 6,000 lbs but the trailer axles aren't always the lowest rated component on a trailer. We do have a wide variety of trailer axles that I am linking for you to filter through but you'll need to match the hub-face and spring-center measurements with what you currently have (see attached photo) and you'll need to verify with your trailer manufacturer that...
    view full answer...
    Image 1 for
  • Boat Tires are Wearing on the Inside
    When you are getting uneven wear on your tires and the part that is wearing more is on the inside then that hints towards the axle being overloaded. Axles have a natural arch in them that arches up so that when they are under a load they are horizontal and you get even wear on your tires. Overloading your axle would mean that it is arching towards the ground some and would cause that inside wear. I recommend checking the weight capacity of your axle (can be found stamped in the middle...
    view full answer...
  • How to Determine Correct Replacement Trailer Axle for 1993 Innsbruck by Gulfstream
    To choose the correct replacement axle you can measure the one currently on your trailer from hub face to hub face and spring center to spring center. The kit # e43SR has a hub face measurement of 89 inches and a spring center measurement of 74 inches. It's also a 3,500 pound axle which you'll want to verify on yours as well.
    view full answer...
    Image 1 for
  • Complete 3500lb Axle Assembly w/ 2-3/8 Inch Axle Tube, Hubs and Brake Assemblies
    We do offer a 3500 lb axle with a 2-3/8 inch diameter tube that includes 10x2-1/4 inch brake drums and brake assemblies. Leaf springs aren't included. The axle has a hub face to hub face dimension of 89 inches, and the spring center to spring center dimension is 74 inches. The part number of the axle is # e43SR. Similar axles are available in different lengths, but they'd need to be custom fabricated. You can order a custom axle by phoning our customer service folks at 800-298-8924.
    view full answer...
  • How Are Self Adjusting Trailer Brakes Activated
    Self adjusting brakes will adjust themselves when the trailer is moving forward and the brakes are applied if the brakes are too loose. Basically if the arm with the magnet moves beyond a certain amount it pulls a cable that clicks the adjuster of the brake assembly tighter by one click every time until the magnet stops moving too far.
    view full answer...
  • Measuring for Replacement Axles, Bearings, and Leaf Springs for 1976 Dilly Boat Trailer
    I do not have any exact sizes on the parts used for the Dilly trailer, but fortunately all it takes to figure out the correct parts is a bit of measuring. If you would like to send me the following information, I'll be happy to recommend an axle and bearings for you: -The inner and outer wheel bearings -The hub face to hub face dimension -The distance between the spring seats, measured center hole to center hole -Axle capacity I've attached an image showing how to measure these parts....
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Recommended Trailer Axle Hub/Drum and Brakes for 1984 Tandem Axle Trailer Without Standard Axle
    With your 3500lb axles we have many brake assembly options, however they all fit on the brake flange that is 4 hole square. The drums you pictured are agricultural and we don't have anything that is a fit for a replacement. My recommendation is to change your axle out for something that will allow you the industry standard size options and wheel options. My recommendation is the etrailer Trailer Axle w/ Electric Brakes # e43SR. This will give you all you need except for the wheels...
    view full answer...
    Image 1 for
  • Weight Capacity of Flatbed Trailer with Dual 2-3/8 Inch Diameter Axles
    The 2-3/8 inch axles are 3,500 lb axles like # e43SR, so combined you would have a 7,000 lb capacity. The trailer weight will not count in the GVWR of the trailer capacity but the weight will count toward the towing capacity of the hitch, ball mount, hitch ball, and of course the vehicle towing capacity. The component with the lowest rated capacity will be your max capacity. So your towing capacity will be 5,000 lbs based on the coupler and the trailer weight is currently 4,400 lbs,...
    view full answer...
  • Availability of Trailer Axle Kit with 93-Inch Axle, Brakes and Hub/Drums
    Due to shipping size and weight restrictions we cannot ship axles over 89-inches overall length. You'll need to source your beam axle from a local trailer supply shop who can order one for you with the required length, spring seat dimensions and weight rating for your application. There is an alternative, however. We do offer universal-fit axle-less systems from Timbren that are rated up to 7000-lbs and these can be seen on the linked page. Some of these are available with electric brakes...
    view full answer...
  • Trailer Axle Weight Capacity Based on Diameter of Axle Tube
    The diameter of the axle will only give you a general idea of the capacity. Your reference to our customer question and answer page is to give the general industry sizes. Since you know the previous owner customized it with a 4,500 lb axle, that is the information I would go on. Remember that axle capacity doesn't mean trailer capacity. You may be limited by tires, hubs, leaf springs, frame, coupler, or other components to a lesser trailer capacity. Another way to narrow down axle...
    view full answer...
  • Why is Axle Rated Higher than Utility Trailer on Certificate of Origin
    There are a variety of reasons why there might be a 3,500 pound axle on a trailer that is only rated for 2,990 pounds on the certificate of origin. I am not familiar with manufacturers under-rating the capacity in order to bypass certain braking laws, but it's possible that while the axle is rated for a certain capacity, some other component(s) on the trailer are rated for less, such as the suspension. The weight capacity of the trailer is always going to be limited by its weakest component....
    view full answer...
    Image 1 for
  • Axle Capacity and Replacement Brake Assemblies for 1955 Airstream Trailer
    Given the venerable age of your 1955 Airstream (and those folks DO still make 'em like they used to) it is unlikely that you will find replacement hubs with the same bearing set. It will likely be easier and safer to replace the axles with new ones that will use more common modern bearings. Axle weight capacity is usually found on a sticker on the axle or frame. I realize that after almost 60 years that sticker may be long gone, but if you contact Airstream with your trailer's VIN number...
    view full answer...
  • What is Smallest Wheel Diameter that Can Fit on 3,500 lb Trailer Axle e43SR
    Due to the size of the brake drum that comes with the trailer axle part # e43SR the smallest wheel size that can fit with it is 13 inch.
    view full answer...
  • How To Measure a Trailer Axle for Fit and Compatibility.
    There are really two dimensions to help you get the correct axle fit for your trailer. The first is the hub face to hub face (the mounting surface where your wheel meets the hub) and the second is the center of your spring seat to the center of the other spring seat. This along with the capacity is how you choose your axle. I've attached a photo to assist. If you do not have a common size, then there are also universal fit options with the axle-less trailer suspension systems from Timbren....
    view full answer...
    Image 1 for
  • Will the Dexter Trailer Axle w/ Electric Brakes # 35545E-ST-EZ-89 Fit on a 2004 Coachmen 249QB
    To determine whether or not the Trailer Axle w/ Electric Brakes # e43SR will fit your 2004 Coachmen 249QB Spirit of America you will need to do some measuring. Since most manufacturers do not keep track of these kinds of measurements, this is the most accurate way to ensure that your new axle will fit. You will need to measure the hub-face-to-hub-face (A), spring-center-to-spring-center (B), and flange-to-flange (C) lengths to see if it is the same as your current axles. The measurement...
    view full answer...
    Image 1 for Image 2 for
  • How to Measure to Calculate Placement of Torsion Axle
    I understand how it would be unclear which measurement to use since the center of the axle is not the same as the center of the wheel on a torsion axle. For a single axle trailer, measure from the center of the spindle (center of wheel) to the trailer tongue. The position of the wheel center relative to the center of gravity will determine the final axle loading as well as the hitch load. This applies for both leaf spring axles, like # e43SR as well as torsion axles, like yours.
    view full answer...
    Image 1 for Image 2 for
  • Where to Measure to Pick Out Replacement Axle for Trailer
    You are going to need to measure your current axles in a few places to get the correct one. You will need to measure from hub face to hub face and then from the spring seat centers. You will also need to know what bolt pattern you have on your current hubs. I attached a help article on how to determine this as well. I also attached a link to a page with all of the axles we carry. We don't have an extensive list of sizes so you may have to find a local shop to you who can order in custom...
    view full answer...
  • Video Showing Installation of a Trailer Axle
    There aren't any installation instructions for trailer axles because of the vast amount of trailer variations. I have included links to 3 videos showing example installations of axles that should be helpful.
    view full answer...
  • How to Estimate Axle Weight Capacity Based on Axle Diameter
    Since your trailer was built from unidentified existing components the only parts of it that will potentially have a weight rating are the axles themselves. Often axles will have their own sticker or plate with weight specs and sometimes part numbers. Typically axles have the following weight capacities: 1-1/2-inch to 1-3/4-inch diameter = 1000-lbs to 2000-lbs 2-3/8-inch diameter = 3500-lbs 3-inch diameter = 6000-lbs to 7000-lbs 3-1/2-inch diameter = 8000-lbs Keep in mind that a trailer's...
    view full answer...
  • Best Solution for Replacement Brake Parts for 1968 Vintage Scotty Camper
    I've done some research and am unable to find a modern replacement for your vintage hubs. I have found some bearings that match the inner dimensions you list, but there is no 10" hub that works with those bearing sizes. When overhauling a vintage camper, it can be a challenge to find replacement parts. I find that the best course of action is to replace the axle along with the hubs, drums and brakes. This way all of the components will be in good condition and it will be easy to find replacement...
    view full answer...
    Image 1 for
  • How to Determine the Manufactured Date of a Trailer
    If you look at the attached photo you can see that the 10th number is what you will want to go by for the year that the trailer was manufactured on a trailer VIN that has 17 digits. Since yours is a 2 it looks like your trailer was manufactured in 2002 (according to some online searches). Although that can be somewhat helpful, the only way to truly know when the trailer was manufactured would be to see if there are any other tags or plates on the trailer that has a year on them. Otherwise...
    view full answer...
    Image 1 for
  • Replacing Trailer Axles for a 7,000 Pound Capacity Trailer
    Yes, you are exactly right. For a 7,000 pound capacity trailer you would need to order two of the 3,500 pound axles, # e43SR. These axles have a 4 bolt mounting flange for the brakes, included, and hubs with 5 on 4-1/2 bolt pattern. From hub face to hub face the axle is 89 inches long. And from spring center to spring center they are 74 inches long. I have included a link to a video review of this axle for you.
    view full answer...
  • Why Is It a Good Idea to Have Trailer Axle Label Face Rear of Trailer
    Trailer axles like the Trailer Axle # e43SR you referenced aren't necessarily directional, but since the label on the axle has a lot of really important info it's best to have it on the backside of the axle so that debris on the highway would be less likely to damage it and make it unreadable.
    view full answer...
  • Troubleshooting Axle Alignment Issue on Tandem Axle EZ Loader Trailer
    It sounds like you may have a replacement axle that wasn't fitted properly. You will want to make sure you have matching axles as that natural misalignment will cause tire wear issues and can lead to sway issues as well. I've linked the page to all of our axle options to assist. You will want to measure from hub face to hub face on each axle and from spring seat to spring seat center to determine the correct fit. I've linked the page to the options for replacement. You will also want...
    view full answer...
    Image 1 for

< Previous
123. . .7

Do you have a question about this Trailer Axle?

Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video by:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Carrie F
Updated by:
Carrie F
Employee Ryan F
Updated by:
Ryan F
Employee Conner L
Installed by:
Conner L

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.