1. Trailer Axles
  2. Dexter Axle
  3. 2000 lbs
  4. 72 Inch Long
  5. Leaf Spring Suspension
  6. 58 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
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Dexter Axle 5 on 4-1/2 Trailer Axles - 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. Lowest Prices for the best trailer axles from Dexter Axle. 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 etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (4)
  • Q & A (13)
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  • Why etrailer?

Dexter Axle Trailer Axles - 20545I-ST-72-15

  • 2000 lbs
  • 72 Inch Long
  • Leaf Spring Suspension
  • 58 Inch
  • Idler Hubs
  • 5 on 4-1/2
  • Dexter Axle
  • 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.


Features:

  • 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


Specs:

  • 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.


Dexter Axles

Dexter 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.


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

L11404 LubriMatic Marine Trailer Wheel Bearing Grease - 16 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:  5.0 out of 5 stars   (4 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.

- 20545I-ST-72-15
by:

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! 776464



- 20545I-ST-72-15
by:

just what i ordered love the quality and how it was shipped i would buy again thanks 778858



- 20545I-ST-72-15
by:

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 e-trailer. Thanks for everything. 772518



- 20545I-ST-72-15
by:

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. 203729


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Ask the Experts about this Dexter Axle Trailer Axles

  • Replacement Trailer Axle for a 5x10 Utility Trailer
    Unfortunately, we do not have any hubs that match the dimensions you provided. The only other option I have for you at this time would be to replace the axle. If you can provide me with the hub face to hub face and spring center to spring center measurement, I can go about trying to find a replacement axle for you.
    view full answer...
  • Replacement 2K Idler Axle for Carry-On Trailer Model 5x10GW2K
    Carry-On steel-mesh trailer model 5x10GW2K uses a 2000-lb-rated idler axle. We have several 72-inch 2K-rated idler axle kits that come complete with hubs, bearings, races, seals, etc. We do not offer 2K axles without hubs. All of these use a leaf spring center spacing of 58-inches. You can see all kits by clicking on the link provided. We have both 4-on-4 and 5-on-4-1/2-inch bolt pattern kits, so just click on your wheel bolt pattern to see suitable options. Since your trailer uses...
    view full answer...
  • Replacement Axle for 5 x 10 Utility Trailer
    Thank you for all the information; you seem to know the measurements you need, which are hub face to hub face and spring center to spring center. The closest axle we have to the measurements you gave is the Dexter # 20545I-ST-72-15, which measures 72" from hub face to hub face and 58" from spring center to spring center as shown in the accompanying photo. This axle has a 2,000 lb capacity, have idler hubs with a 5 on 4-1/2" bolt pattern (I have attached a link to a help article on determining...
    view full answer...
  • Trailer Axle Replacement for Conversion to Tear Drop Camper
    For your new axle installation to convert a trailer into a tear drop you can simply have new springs seats welded onto the new axle (by an experienced welder) at the appropriate spacing for the existing suspension. The linked page displays all sizes of spring seats which are selected based on axle diameter. For the 2K Dexter round axle # 20545I-ST-72-15 which is 1-3/4-inches you would use two of spring seat part # TRSS175.
    view full answer...
  • Information Needed To Replace Trailer Axle
    I am happy to help you figure out how to find the correct axle however I am not able to find axle information based off of trailer VIN. The information needed when selecting a replacement trailer axle are weight capacity, the hub face dimension, and the spring center dimension. Please refer to the linked diagram. The particular axle diagram shows the measurements for Dexter Trailer axle # 20545I-ST-72-15 which measures 72" hub face to hub face and 58" spring center to spring center. If...
    view full answer...
  • How to Choose Replacement Axle for Old Boat Trailer
    Thank you for those part numbers, it made it much easier to look, but there are no current hubs available that have the combination of that bearing and that grease seal, which is not altogether surprising since you mentioned it's an old boat trailer. Essentially - since you absolutely do not want to repair a hub for safety reasons - what that means is you are going to need to replace the axle (which you can get with the hubs already on) to get a more modern axle and spindle combination....
    view full answer...
  • Is Axle Length Needed When Picking Out Replacement for Trailer Axle
    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. I also attached a link to a page with all of the axles we carry.
    view full answer...
  • How to Determine Which Replacement Axle is Needed for Karavan LB-2200-70-17-SF-ST Trailer
    I've contacted Karavan, and they could tell me that you have a 2200 lb axle, but they unfortunately couldn't tell me anything about a replacement axle. In order to determine if any of our stock axles would work for you, I'd need to know the hub face to hub face dimension as well as the center to center distance between the spring centers welded to the axle. I would also need to know the wheel bolt pattern of your existing wheel/ tire, assuming you're wanting to reuse them. The diagram...
    view full answer...
  • Recommendation For Replacement 2000-Lb Trailer Axle
    The best way to find an axle that will match your trailer is to measure the spring-center-to-spring-center distance and the hub-face-to-hub-face distance of the axle you have on your trailer currently. I have attached a drawing that shows where these dimensions are taken. It may be easier to replace the axle with an axle that has the hubs already included. If you find you need a 72-inch axle and your wheels have a 5 on 4-1/2 inch bolt pattern I recommend part # 20545I-ST-72-15. This...
    view full answer...
  • How to Determine Axle Fit for Homemade Trailer
    In order to choose the correct replacement axle you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center as in the diagram I have added; the other thing you need to know is the weight capacity of the axle you need, which should exceed the GVWR of your trailer. For example the Dexter Trailer Axle with Idler Hubs # 20545I-ST-72-15 has a 2,000 lb capacity and measures 58 inches from spring center to spring center and 72 inches from...
    view full answer...
  • Replacement Axle-Less Suspension System Rated for 2,000 lbs
    While we do have a potential solution for you, it isn't a traditional axle because we do not carry any with the lengths you offered. It does sound like you were close to the correct measurements you need to find the correct replacement axle (hub face to hub face and spring center to spring center) but the closest we have is 72 inches from hub face to hub face and 58 inches from spring center to spring center such as # 20545I-ST-72-15 and # 20545I-EZ-72-15. Since these are not the correct...
    view full answer...
  • Info Needed to Pick Out Replacement Axle and Suspension for a Trailer
    You would need to measure from the hub face to hub face and then from the spring mount centers to pick out the correct axle to fit your trailer. I attached a picture that shows where these measurements are. Once we know that we can pick out the correct size axle. We can assume a lighter capacity axle would be what you'd need but you will need to let me know the weight of your trailer when loaded so we can ensure we get the correct capacity. From there we'll be able to determine the correct...
    view full answer...
  • Trailer Axle for a Home Made Tear Drop Trailer
    Modifying a trailer axle is not recommended because they are designed specifically to handle the weight the way that they are. By making the axle longer it can cause the axle to flex under the weight of the trailer and lead to all sorts of problems. The solution is to replace the axle. Straight axles are actually not all that expensive. But I would need to know the measurement of the existing axle from the spring seat center on one end to the spring seat center on the other end to select...
    view full answer...

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Written by:
Lindsey S
Video Edited:
Dustin K
Updated by:
Mike S

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