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  1. Trailer Axles
  2. etrailer
  3. 3500 lbs
  4. 95 Inch Long
  5. 80 Inch Long
  6. 5 on 4-1/2 Inch
Trailer Axle w/ Electric Brakes - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs

Trailer Axle w/ Electric Brakes - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs

Item # e45SR
Our Price: $521.18
Trailer Axles
Shipping Weight: 102 lbs
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Trailer axle measures 95" from hub-face-to-hub-face and 80" 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 - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs part number e45SR can be ordered online at or call 1-800-940-8924 for expert service.
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etrailer Trailer Axles - e45SR

  • 3500 lbs
  • 95 Inch Long
  • 80 Inch Long
  • 5 on 4-1/2 Inch
  • Drop - 4 Inch
  • Leaf Spring Suspension
  • Electric Brakes
  • etrailer
  • Easy Lube Spindles

Trailer axle measures 95" from hub-face-to-hub-face and 80" 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
  • 4" Drop, Easy Grease spindles
    • Lowered axle beam provides lower deck height for easier loading and unloading
    • Patented welding process prevents spindle failure with 40% stronger welds
    • Built-in grease zerk for simple lubrication
  • Spring seats and spindles are welded on
  • Self-adjusting electric brakes are easy to install - no actuator or hydraulic lines necessary
    • Adjuster plugs, mounting bolts, and hardware included
  • 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: 95"
  • Spring-center-to-spring-center length: 80"
  • Spindle drop: 4"
  • 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"
  • Axle tube thickness: 0.18"
  • Wheel size: 13" to 15"
  • Limited lifetime warranty

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • 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.

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.

Self-Adjusting Brakes Don't Require Routine Maintenance

With typical electric brake assemblies, you need to manually adjust them every now and then to make sure you're getting the shortest stopping distances every time you tow.

A trailer drum brake with a red callout shows the location of a tension cable and pulley on a self-adjusting trailer brake.

With self-adjusting brakes, though, you'll always have peak stopping power - simple as that! As the brake pads wear over time, a tensioning cable will automatically keep the pads in alignment so they'll consistently make contact with your drum when you brake. You won't have to do tedious manual adjustments anymore.

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"

BD35RUW95.00080.000 etrailer by AxleTek 3,500 lb Axle Beam w 4" Drop - 95" Hub - 80" Sp Ctr

B10EA-21 AxleTek 10" x 2 1/4" LH Self-Adjusting Electric Brake Assembly - Drivers Side - 3.5K Axles

B10EA-22 AxleTek 10" x 2 1/4" RH Self-Adjusting Electric Brake Assembly - Passengers Side - 3.5K Axles

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

Customer Satisfaction Score:

Customer Reviews

Trailer Axle w/ Electric Brakes - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs - e45SR

Average Customer Rating:  4.6 out of 5 stars   (102 Customer Reviews)

Trailer axle measures 95" from hub-face-to-hub-face and 80" from spring-center-to-spring-center. Includes electric brake assemblies, hubs, drums, bearings, races, seals, and mounting hardware. Easy Grease spindles for simple lubrication.


Exactly what I ordered packaged nice and pregreased bearings.


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.

Etrailer Expert

Brooke M.


I am so sorry about that--how frustrating! I will have our customer service team reach out to you.


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.


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


Wrong axle sent did not need the 4" drop down.

Etrailer Expert

Katrina D.


I am sorry to hear that this was not the correct axle set that you are needing. If you are needing an axle with no drop, I would recommend part # e52SR. This axle has most of the same specs as the axle you ordered, minus the drop. Let me get you over to our customer service department for them to look into what would best suite your needs.


Not only is it not what I ordered 2 of the TA cayman parts and pieces in the advertisement. It doesn't say anything about coming in parts and pieces. I'm not a mechanic. Now I have to pay somebody to put it together. I think that's very poor business

Etrailer Expert

Jenny N.


This axle will need to be welded onto the trailer and then the hubs with the brakes would be installed on the spindle. I do recommend having it professionally welded. We do have a FAQ that can help with installing the hubs and brakes.


Paige was a huge help in getting me what I needed and fast!
Got my new axle in a day and was back on the road.
You will not be disappointed with etrailer!


Product was exactly what I was after and helps me too get trailer back to work faster.


Good product so far but no instructions at all


fast shipping great pricing


Worked great, fairly easy install, no p roblem!


Everything good


Got it in all the pieces look great and shipping was fast. Originally said that I would receive it on Tues the 15th and actually got it on Sat the 12th.


Shipping was super fast. Price was right but it comes unassembled. I had a few of the brake pieces come off and had to put them back together.


The order was shipped as promised and was complete and of good q1uality











Show More Reviews

See what our Experts say about this etrailer Trailer Axles

  • Info Needed to Pick Out Trailer Axles for Airstream Safari 25SS
    We don't have a way to look up exactly what axle you need based on what you listed but we can still help. When picking out an axle for a trailer you'll need to know the overall length of it from hub face to hub face as well as the distance between the spring seat centers to pick out correct size. You'd also need to know the capacity. Based on your GVWR 6k or 7k axles would easily work fine. I also attached a link to a page with all of the axles we carry.
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  • Comparing etrailer And Dexter 3,500lb 4 Drop Axles
    The two options you're referring to, the Dexter Trailer Axle w/ Electric Brakes # 7685269-EB and Trailer Axle w/ Electric Brakes # e52SR are essentially the same when it comes to their specs. The only difference is the manufacturer with one being Dexter, which is a very well known brand in the industry, and the other being manufactured by Axle-Tek. Having worked with both I can say there isn't a real distinction in quality so I tend to go with the lower cost of with Axle-Tek components....
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  • How to Determine Replacement Axle
    While we won't have doors, we may have a replacement axle for your trailer, but have no way of knowing what axle fits any specific trailer. So you'll have to do some measuring, as you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center; I have added a link below to a video which walks you through how to measure. The other thing you need to know is the weight capacity of the axle you need, which should match or exceed the GVWR of...
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  • Install Video for Trailer Axle w/ Electric Brakes - 4 Drop - 5 on 4-1/2 Bolt Pattern - 95 Long
    We don't have an install video on this exact axle, the Trailer Axle w/ Electric Brakes - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs part # e45SR, but I did do one on a similar style which I have attached for you below. It won't be the exact same but fairly close. This axle assembly will be just as good as a Dexter without the extra cost.
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  • How To Adjust Brakes On Trailer Axle w/ Electric Brakes 4 Drop - 3,500 lbs - 5 on 4-1/2
    I have attached a video for you below which shows the process to adjust electric trailer like those on the Trailer Axle w/ Electric Brakes - 4" Drop - 5 on 4-1/2 Bolt Pattern - 95" Long - 3,500 lbs part # e45SR. If you skip to the 4:40 mark you can see the process.
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  • Recommended Replacement Axle for a 3.5K Axle On a Diamond G Horse Trailer
    It appears that you're looking for a replacement 3,500 lb axle with a 95" hub face to hub face measurement and an 80" spring seat center measurement, in which you can use the Dexter Trailer Axle w/ Electric Brakes # 7685269-EB. This is a 3,500 lb axle with an 95" hub face to hub face measurement, 80" spring seat center to spring seat center measurement, and includes 10" diameter x 2-1/4" wide electric brakes.
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  • Replacement 3,500 lbs Axle w/ 4 Inch Drop for a Tandem Axle Trailer w/ a 5 on 4-1/2 Bolt Pattern
    I have a solution for you and a great axle but it is going to require you to move your spring seats. It is the Trailer Axle w/ Electric Brakes item # e45SR. This axle has spring seats mounted at 80". It has a 4" drop with hubs that have a 5 on 4-1/2 bolt pattern. This axle kit includes electric brakes as well. The hub face to hub face measurement is 95" which will not be an issue as you will only have a 1/4" extra on either side. I have linked an installation video below. If your tandem...
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  • 3,500LB Trailer Axle With 5 on 4-1/2" Bolt Pattern & 4" Drop With Electric Brakes 81" Spring Center
    Based on your hubs it sounds like you have a 3,500lb axle since you have the 5 on 4-1/2" bolt pattern. It sounds like the Trailer Axle # e45SR is the size you are needing. This has a hub face spread of 95" and the spring seats are 80" on center. These can be removed and new Seats # TRSS238 welded on to the 81" measurement you need which will prevent the additional cost and wait if special ordering an axle.
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  • Will 3,500 lb Axle Trailer Axle e45SR Work With 81 Inch Spring Centers
    The 3,500 lb capacity Trailer Axle w/ Electric Brakes # e45SR has spring centers that are 80 inches apart so it wouldn't work as-is with 81 inch spring centers. You could use it but you'd have have its spring centers removed and new Spring Seat for Typical 3,500-lb, Round Trailer Axles with 2-3/8" Diameter # TRSS238 welded on.
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  • Availability of a 3,500LB Trailer Axle With 4 Inch Drop, 95 Inch Hub Face, and 81 Spring Center
    I see you were looking at the 3,500lb Trailer Axle w/ Electric Brakes # e45SR. While this does have the 95" hub face you are needing the spring seats are spaced 80" versus 81". You will need to remove both spring seats and have 2 new Seats # TRSS238 welded in at the 81" spring center position. We currently do not carry any axles with the spring seats already at 81".
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  • Do You Have a 3,500LB Axle with 4" Drop and 5 on 4-1/2" Bolt Pattern with Electric Brakes, 95" Hub F
    All of our 3,500LB, 4" drop axles with 95" hub face like our etrailer Axle # e45SR you found are going to have a 80" spring center. As we do not offer custom axles you can easily have the springs seats removed and 2 new Seats # TRSS238 installed at your 81" spring center. This is typically cheaper and much faster than ordering a custom axle from a local dealer. I recommend upgrading to the U-Bolt Kit # CE23002 with galvanized spring plates and zinc coated hardware to resist corrosion.
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  • Replacement Axle Options For a Concession Trailer Having 95" Hub Face, 4" Drop and 76" Spring Center
    With your axle being a 2-1/2" diameter it sounds like you will need either our etrailer Axle # e45SR or the Dexter # 7685269-EB. Both of these are 3,500lb axles with the 4" drop a 95" hub face and electric brakes included. You will only need to have 2 new Spring Seats # TRSS238 welded on the axle at the 76" spring center you are needing. The current spring seats are welded from the factory at 80" but you are able to move them as not all trailers will have the same measurements. I do recommend...
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  • Replacement Spindle and Axle Options For a 3,500LB Trailer Axle With Bent 4 Drop Spindle
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    Image 1 for
  • Replacement 6,000LB Axle With 4 Drop Spindle and Electric Trailer Brakes
    The Trailer Axle w/ Electric Brakes # e45SR is the closest axle we have that meets the criteria that you gave me. This axle is 6,000lbs with a 4" drop. It has a spring center to spring center measurement of 74" and hub face to hub face of 89". It includes electric brakes and hubs with a 6 on 5-1/2" bolt pattern. The axle does include easy lube spindles that make greasing your bearings much easier. If this will not work please let me know your hub face dimension and wheel bolt pattern...
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  • Hanger Kit, Leaf Springs, and U-Bolt Kit for Dexter 3,500 lb Trailer Axle
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  • Trailer Brakes and Hubs For Adding Electric Trailer Brakes To a Dump Trailer With 2-3/8" Axle Tubes
    If you do indeed have a 3,500lb axle it will use a 10" Brake Kit # AKEBRK-35-SA per axle on your dump trailer. It is best to remove one of your hubs as this will allow you to measure for the bearings and grease seal and be able to verify you have a Brake Flange # 4-35 for the brake assemblies to mount. A 3,500lb axle will have a Grease Seal # 58846(ID 1.719" / OD 2.565"), Inner Bearing # L68149(ID 1.378") and Outer Bearing # L44649(ID 1.063"). If this matches what you have you will need...
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Info for this part was:

Employee Lindsey S
Edited 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 Conner L
Installed by:
Conner L
Employee Mike S
Written by:
Mike S

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