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  1. Trailer Axles
  2. etrailer
  3. 2000 lbs
  4. 72 Inch Long
  5. 58 Inch Long
  6. 5 on 4-1/2 Inch
Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs

Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs

Item # e37YR
Our Price: $210.66
Trailer Axles
Shipping Weight: 37 lbs
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Round trailer axle beam measures 72" from hub-face-to-hub-face and 58" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" wheels. Great Prices for the best trailer axles from etrailer. Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs part number e37YR can be ordered online at or call 1-800-940-8924 for expert service.
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etrailer Trailer Axles - e37YR

  • 2000 lbs
  • 72 Inch Long
  • 58 Inch Long
  • 5 on 4-1/2 Inch
  • No Drop or Lift
  • Leaf Spring Suspension
  • Idler Hubs
  • etrailer
  • Easy Lube Spindles

Round trailer axle beam measures 72" from hub-face-to-hub-face and 58" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" wheels.


  • 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
  • Cast iron idler hubs are sturdy and durable
    • Pre-greased idler 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: 2,000 lbs
  • Hub-face-to-hub-face length: 72"
  • Spring-center-to-spring-center length: 58"
  • Hub bolt pattern: 5 on 4-1/2"
  • Grease cap flange diameter: 1.988"
  • Wheel stud dimensions: 1/2" diameter x 1-5/16" long
  • Hub diameter: 6-1/4"
  • Axle diameter: 1-3/4"
  • Wheel size: 13" to 15"
  • Limited lifetime warranty

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.

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: L44649 (1.063" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (included)
    • Inner race: L44610
    • Outer race: L44610
  • Grease seal (included): 10-9
    • Inner diameter: 1.50"
    • Outer diameter: 1.987"

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"

BS20RUX72.00058.000 etrailer by AxleTek 2,000 lb Axle Beam - 72" Hub Face - 58" Spring Ctr

17-165 Idlr Hb Asm Compl Boxed - 2K - 13-15" - 5 on 4.5 - PG BTR EZ

Customer Satisfaction Score:

Customer Reviews

Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs - e37YR

Average Customer Rating:  4.8 out of 5 stars   (238 Customer Reviews)

Round trailer axle beam measures 72" from hub-face-to-hub-face and 58" from spring-center-to-spring-center. Includes pre-greased idler hubs - with bearings, races, and seals - for 13" to 15" wheels.


Fast delivery, well packaged, so the axle wouldn't get damaged during shipping! Would for sure order again, and highly recommend etrailer!


Had a shipping problem not etrailers fault they shipped another axle right away very quickly customer friendly for sure


I was amazingly impress with how easy it was to install. I'm not mechanically inclined but with the easy access to the trailer axle. I may become a mechanic, (smile) thank you very much for your item and support.


Axle seems solid. "Pre-installed" bearings had to be put back in because they slid out easily when installing the hub on the axle. I also had to go out and purchase new cotter pins (both were installed to a point where removing them resulted in one breaking and not trusting the other) and dust caps were heavily dented. That said, axle came 2 days earlier so I got to fish more.

Etrailer Expert

Sierra K.


Customer Service will be reaching out.


i sent this one back and ordered the correct axle. working great.


Customer Support was great.




Excellent product, super fast shipping. I would highly recommend doing business with etrailer.


Best price out there and 100% satisfaction your follow up on shipping date and tracking is excelant


After 1 yr everything is going good. I used it 3 times and no issues. Very helpful customer service, I will recommend you to others who need trailer parts. Thank you..


it worked fine on me trailer


Awesome job, very pleased with the service. The item was backordered they tried to replace with different item, but would not work for my application. They sent item out as soon as they had the parts together. Kept me we'll notified an was very professional to do business with. Thanks ??


Awesome buy it’s still working great thanks


Axle and hubs fit perfectly. Super satisfied with purchase.


Order came in quickly. Easy to put on t railer.











Show More Reviews

See what our Experts say about this etrailer Trailer Axles

  • Recommended Replacement For A 26-1/4" Long Double Eye Leaf Spring
    We do have a spring that will be a suitable replacement for your 708-no500 leaf spring. Our springs will be 26" eye to eye, but a 1/4" difference will not effect anything and will be completely fine to use as a replacement. We have them available in a few different weight capacities, and we will want to try to match that to your axles weight capacity. I have listed the options below. 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # e22YR 6-Leaf Double-Eye Spring for 6,000-lb...
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  • Recommend U-Bolts For A 72 Inch Long 2,000 Pound Axle
    When it comes to The Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72 inch Long - 2,000 pounds # e37YR the U-bolt kit does not come with it. The U-Bolt Kit for Mounting 2,000-pound, Round Trailer Axles - 4-1/4 inch Long U-Bolts # APUBR-10 is the kit you would need to work with the # e37YR. I will attach a review video link below.
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  • Can Trailer Hub Be Swapped to Fit Different Spindle by Swapping Bearings
    You are not able to swap a a hub that was designed for a different size spindle to fit a different spindle by just swapping bearings. If you can fit the 14 inch wheel and tires I would go that route if you can as they'll have better weight capacities and stability. The Karrier wheel and tire part # AM32182 is a 14 inch wheel and tire in the size of ST215/75R14 that has a weight capacity of 1,870-lb maximum load at 50 psi.
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  • Recommended U-Bolt Kit for Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000
    The U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles part # APUBR-10 is what I recommend for the Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs part # e37YR.
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  • Availability Of Axle To Replace 71" Hub Face 58" Spring Seat 1-1/2" x 1-1/2" 2,000lb Axle
    I have an option that will work for you, but we don't sell any 1-1/2" x 1-1/2" square axles. We do have the 2,000lb # e37YR which has a hub face measurement of 72" which will push your wheels out 1/2" on each side which isn't a big deal, and has the same 58" spring seat spacing so it'll fit your frame perfectly. This comes with hubs that have the common 5 on 4-1/2" bolt pattern, but it's available with the 4 on 4" bolt pattern also as # e62YR. As this is a 1-3/4" round axle you'll need...
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  • Looking For Replacement Seals For An Old Utility Trailer That Has 7205E Bearings
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  • What is Difference Between Axles Dexter part # 20545I-EZ-72-15 and etrailer # e37YR
    The two axles you referenced, the Dexter part # 20545I-EZ-72-15 and the etrailer # e37YR are essentially the same axle made by two different companies but the specs are the same. They are both 2,000 lb axles that are 72 inches long with spring center dimensions of 58 inches with idler hubs that have a 5 on 4-1/2 inch bolt pattern. Most will argue that the Dexter axles are the highest quality so that would be what I would go with if I were you.
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    Our narrowest 3,500lb axle is going to be the Axle # e65GR which is 89" from hub face to hub face. To mount this and widen your trailer you will need to modify the trailer which will entail new frame and suspension components. We do have a 72" wide 2,000lb Axle # e37YR which still exceeds the weight rating on your Harbor Freight trailer. This will still likely require some modification as it is about a foot wider than your stock axle. Both axles come with 5 on 4-1/2" idler hubs and will...
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  • Replacement Trailer Axle For 5' X 8' Ironton Trailer With 15" Diameter Wheels and Tires
    Based on the Dimensions of the 5'x8' Ironton trailer you are most likely to need the Trailer Axle with Idler Hubs # e37YR. This axle places the hub faces at 72" which is 6 inches wider than the bed size of your utility trailer. The spring center to spring center is 58" and if this does not exactly match your trailer you can weld 2 new Seats # TRSS175 on the axle. We do have the U-Bolt Kit # CE23000 to mount the axle to your leaf springs. This axle includes 5 on 4-1/2" bolt pattern idler...
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  • Identifying a Replacement Axle for a 1993 Jayco Eagle 10 Trailer
    We have a couple options for 72" hubs. I have linked a diagram that will show you what dimensions you are looking for so you can ensure that's what you need on your 1993 Jayco Eagle 10 trailer. Also you may be able to find an axle tag or stamp that could help you identify the correct size of your current axle. If you don't need brakes we have the etrailer Trailer Axle with Idler Hubs - 72" Long - 2,000 lbs item # e37YR. These come with idler hubs that have a 5 on 4-1/2 Bolt Pattern. If...
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  • Correct Axle and 13 Inch Tire and Wheel Kit for Homemade Trailer with 58 Inch Spring-Centers
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    I do have a solution for you, but with you having the 09067 outer bearing and 14130 inner bearings, we will not have anything that will replace your hub. Though you will need to measure a few things to make sure it will work, I recommend replacing the axle. Something like the Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs # e37YR comes with pre-greased idler hubs that have a 5 on 4-1/2 bolt pattern and will be very easy to get wheels for. However,...
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    We have an option to replace your axle, but not with a standard through-axle as there isn't one with a 62 inch hub face to hub face measurement. There are 60 and 72 inch lengths, but those would be too short and long, respectively. What you can do instead is use the Timbren Axle-Less Suspension System, which are simply bolted or welded so you do not have to worry about finding an axle that meets any specific measurements. For a 2,000 lb axle there is a standard option as well as one with...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video by:
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Employee Chris R
Video Edited:
Chris R
Employee Leah S
Updated by:
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Employee Wilson B
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Employee Kristina F
Updated by:
Kristina F
Employee Carrie F
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Employee Conner L
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Employee Michael B
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