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

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

Item # 20545I-ST-72-15
Our Price: $310.36
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Shipping Weight: 39 lbs
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Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs 2000 lbs 20545I-ST-72-15
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Round trailer axle measures 72" from hub face to hub face and 58" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 12" to 15" wheels. Great Prices for the best trailer axles from Dexter. Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs part number 20545I-ST-72-15 can be ordered online at or call 1-800-940-8924 for expert service.
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Dexter Trailer Axles - 20545I-ST-72-15

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

Round trailer axle measures 72" from hub face to hub face and 58" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 12" 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
    • Low ride height makes it easier to load and unload your trailer
  • Straight spindle - no drop
    • Standard grease application
  • Spring seats and spindles are welded on
  • Cast iron idler hubs are sturdy and durable
    • Bearings, races, seals, grease caps, wheel studs, lug nuts, and marine-grade wheel bearing grease included
  • Limited 2-year warranty


  • 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"
  • Tubing outer diameter: 1-3/4"
  • Spindle size: 1-1/16"
  • Grease cap outer diameter: 1.986"
  • Wheel stud diameter: 1/2"
  • Wheel size: 12" - 15"

Bearing, Race, and Seal Information

  • Bearings
    • Inner bearing: L44649
    • Outer bearing: L44649
  • Races
    • Inner race: L44610
    • Outer race: L44610
  • Seal: 10-9
    • Inner diameter: 1.50"
    • Outer diameter: 1.987"

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.

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.


Dexters 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.

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"

T20BTR-7258 Dexter Replacement Axle Beam - 60" Hub Face - 48" Spring Center - 2,000 lbs

8-258-5UC1 Trailer Hub Assembly for 12" to 15" Wheels - 2,000-lb Axles - 5 on 4-1/2 - L44649

457458 Loctite Viper Lube High Performace Synthetic Lubricant - 14.1 oz Can

Customer Reviews

Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs - 20545I-ST-72-15

Average Customer Rating:  4.8 out of 5 stars   (350 Customer Reviews)

Round trailer axle measures 72" from hub face to hub face and 58" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 12" to 15" wheels.


Everything was as expected and we were able to repair our trailer without issues. Shipping was prompt and the service was great. Received the package one day earlier than initially promised

David Y.


The axle has continued to work with no issues. I use the trailer minimum every 2 weeks to make a 200 mile roundtrip so its getting plenty of wear with no signs of slowing down. My trailer is the Lowes 5x8 utility trailer with the mesh bottom, for reference


I recently purchased a 1997 Pacific boat trailer, 2,000 lb capacity. Installed new lights, spare tire carrier, and tongue jack two months ago. Decided I may as well replace the wheel bearings and seals only to discover the spindles had deep gouges from the seals or material between the seal and spindle shaft. The right side (as viewed from the rear) even had a deep gouge in the seal area from who knows what. Surprisingly, the wheel bearings were fine.

My initial intention was to use what is called a "speed sleeve" to repair the seal contact area on the spindle, in addition to replacing the wheel bearings. The bearings were an odd size, thus somewhat expensive. Cheaper to replace the hubs but with the "speed sleeves", would come out to nearly $200, notwithstanding my labor.

To the rescue, etrailer! I measured my existing axle per the directions from the staff and ordered a replacement axle with hubs and a U-bolt kit for nearly the same price. Shipping was surprisingly fast given current events and a brand new axle and associated parts were delivered last night (8 April, 2020).

I've replaced wheel bearings before but have never replaced a trailer axle, so I was initially somewhat intimidated by the job. I jacked the trailer up to remove the wheels and used jack stands to ensure it would remain that way while I proceeded to remove the old axle.

The u-bolts (not quite a U given the square axle) were not too bad to remove. I used copious amounts of WD-40 on the threads and an adjustable wrench did the rest of the work. I was going to use an air ratchet but did not have enough clearance and did not wish to risk raising the trailer any further.

The old axle came out fine and was a bit heavy, around 50 lbs by my reckoning. Given the service life of 23 years, I'd say it did a good job (it was the original axle). Interestingly, the new axle weighed a good 10 - 15 lbs lighter...

The new axle went in fine, although due to the camber, which the original axle did not have, it took a bit of "squeezing" to get the holes on the spring seats. Nothing terrible, and my initial measurements were correct.

I did not take photos of the bearing and seal installation process as my hands had a fair amount of grease on them but if you follow the instructions, it is relatively simple. Make sure you "cup" the outer bearing area with grease in your palm to force it between the rollers. You will know when you have enough as it will be pushed between the rollers on the other side. Take a look at some [online] videos if you have never seen it done before. I believe there is a video on the etrailer website.

I used a short piece of 2x4 to install the seals and they went in without fanfare. I would recommend wiping a thin film of grease on the seal seating area of the hub prior to seal installation.

Installing the hubs was relatively straight forward, I seated the bearings while rotating the hubs to the recommended 50 ft/lbs. Then backed off WITHOUT rotating the hub, finger tightening, and installing the locking clips, which I have never seen before as I typically use cotter pins.

I installed the wheels and will be installing my "Bearing Buddies" later this afternoon.

All told, the job took me approximately 2 1/2 hours, maybe 3. I took my time and did my best to ensure it was a safe evolution given that the trailer had to be raised enough to allow axle replacement.

I will re-torque the u-bolts after some use and will probably re-seat the bearings as well. The price on the new bearings and seals is a significant improvement over what had come standard with the trailer.

Tools used were a 3/4" socket and 3/8" drive ratchet, 10" adjustable wrench, 1 1/2" socket and 1/2" drive torque wrench, 1/2" socket for the new u-bolts, a soft faced hammer to remove the "Bearing Buddies", (2) jack stands, and standard floor jack. Paper towels were most helpful during the bearing greasing and installation process...

If you have never done this before, like me, I can assure you it was relatively straight forward and I'm sitting here somewhat proud of myself...

Kudo's to the staff at etrailer!


This trailer has been perfect. Love not having to shovel gravel, etc. So much easier. Thank you again.
Your service was exceptional. Thank you for reaching out.


Axle is great and even came with lubricant. Shipping was fast.


I did a full trailer overhaul and the axle kit with bearings and hubs were a perfect fit. was easy to find what I needed and shipped quickly !


I received everything in a timely fashion. The axle dimensions were right on and fit the frame I was building perfectly. These springs and axle is being used on a trailer for hauling Kayaks. Springs a still a little stiff for the application but these are the lightest springs available.


After one full year, the trailer axle is still good as new. It was a perfect fit from the get-go. Definitely will be purchasing more items as needed from etrailer. Thanks for everything.


Looks good, thanks for sending grease for bearings. Did not expect that!!


Still doing it's job, perfectly.



just what i ordered love the quality and how it was shipped i would buy again thanks


Good producr. Quick delivery.



These axles work great. I replaced three axles on my trailer last fall (2022) with these axles. I was able to install the new axles and springs in about 3 hours because everything matched up very nicely - thanks to the help of the folks at etrailer.


After years of hauling firewood my Harbor Freight Trailer Axle fatigued and cracked. The Dexter Axle from etrailer got me back on the trail. Welded leaf spring seats on the opposite side of the axle at a spacing of 46.5 inches. The wheels stick out an additional 3/4 inch per side. The trailer now rides like a Cadillac. Very excited about putting my faithful trailer back in service, with a serious axle underneath that I have confidence in. The folks at etrailer very helpful and responsive. Thanks


I purchased a number of products from etrailer and I am very pleased with them all. The shipper lost my axle. When I contacted etrailer customer service, they handled my problem quickly and I had a replacement axle in a couple days. Well done!

The products were all of high quality and the assemble was much easier as a result. I have attached a few pictures of the build for those interested.

Thanks etrailer for your great products and service!!


I ordered this axle as a replacement for the one on my 1996 Haulin' 4x8 utility trailer. I'd neglected to maintain the bearings and when one went it destroyed my axle. This axle was an exact fit but the spring seats needed to be moved to the top of the axle. I ordered new seats and U-bolt mounting kit as well as the axle. I found a welder to remove the original spring seats and weld the new ones to match my application. Installation was a snap, I just followed the video included on the web site. Ordering my parts from etrailer really saved me $$ over the quotes I'd received from local shops.


I bought a axle, springs wheels, hubs etc. to build a utility trailer, I inadvertently had ordered incompatible hubs for the selected axle the person filling the order noticed this and contacted customer service to alert them of the issue who then called me to correct the problem. This saved me the time and expense of returning the part and delaying the project. great service, attentive, knowledgeable employees and great products.
Thanks E trailer.


Quick delivery with tracking link! Great product and price!! Easy process to install axle and hubs. I would have appreciated a torque specification for the U-Bolts and Lug nuts in the video. I didn't take the time to search other locations or Q&A.

Tip: 1-1/2 " PVC makes a great tool to seat the grease seals. I used my 28MM socket, it was very close to size. I decided to use 2" Schedule 40 PVC pipe to install the E-Z Lube dust seal. I have many tools however no wooden hammers.


Product seems to be built well. I was missing a set of outer bearings that I had to get from a local tractor supply due to time constraints. They were missing when shipped to me. I have been happy so far with this product as I have pulled my home built teaardrop on it. I have traveled over 3k miles with it as well as a tire set I purchased from etrailer.
Contender ST205/75R15 Radial Tire w 15"
Good sturdy wheels and tires and they look good in person.


I installed the Dexter axle on my trailer yesterday, and I was very impressed with the quality and the ease of installation. The install took much less time than expected, and this was helped by the hubs having the bearing pre-installed, what a bonus! This is a great solution to replace a fried axle, I highly recommend it.


Really good solid axle... I needed the mounting tabs moved and had a metal fabricator do the work for $20.00. This was used on an old boat trailer that I turned into a utility trailer. Also swapped out the springs with ones purchased from etrailer too. To complete the package I ordered (3) 165/65-8 trailer tires. The trailer tows straight and hauls everything I've ever needed to.


Fits as it should. EZ lube hubs are much easier than having to repack the bearings. This is the second purchase I’ve made from etrailer and their service has been great.


I think I'd like to change the review to 3 stars and say:
Though the mechanical quality of the axle/hubs is great, whatever the axle and hubs are painted with comes off very easily. Simply removing tape would pull the paint with it. This will eventually lead to these parts rusting and you'll need to add an additional coat of paint to prevent rust. The paint quality is very poor


Solid axle with all the bolts and brackets to mount the axle quick and easy. Solid axle, should last a long time.

Show More Reviews

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