1. Trailer Axles
  2. Dexter Axle
  3. 2000 lbs
  4. 60 Inch Long
  5. Leaf Spring Suspension
  6. 48 Inch
Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs

Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs

Item # 20440I-ST-60
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20440I-ST-60 - 48 Inch Dexter Axle Leaf Spring Suspension
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Round trailer axle measures 60" from hub face to hub face and 48" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 10" to 13" wheels. Lowest Prices for the best trailer axles from Dexter Axle. Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs part number 20440I-ST-60 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (9)
  • Q & A (19)
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  • Why etrailer?

Dexter Axle Trailer Axles - 20440I-ST-60

  • 2000 lbs
  • 60 Inch Long
  • Leaf Spring Suspension
  • 48 Inch
  • Idler Hubs
  • 4 on 4
  • Dexter Axle
  • Standard Spindles

Round trailer axle measures 60" from hub face to hub face and 48" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 10" to 13" 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: 60"
  • Spring-center-to-spring-center length: 48"
  • Hub bolt pattern: 4 on 4"
  • Tubing outer diameter: 1-3/4"
  • Spindle size: 1-1/16"
  • Wheel stud diameter: 1/2"
  • Wheel size: 10" - 13"
  • Grease cap outer diameter: 1.986"

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-6048 Dexter Replacement Axle Beam - 60" Hub Face - 48" Spring Center - 2,000 lbs

8-91-05UC1 Trailer Hub Assembly for 2,000-lb Axles - 4 on 4 - L44649

L11404 LubriMatic Marine Trailer Wheel Bearing Grease - 16 oz. Can

Customer Reviews

Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs - 20440I-ST-60

Average Customer Rating:  4.7 out of 5 stars   (9 Customer Reviews)

Round trailer axle measures 60" from hub face to hub face and 48" from spring center to spring center. Includes idler hubs - with bearings, races, and seals - for 10" to 13" wheels.

- 20440I-ST-60

Great Service, very helpful, axle fit perfectly dimensions were exact. shipped out and arrived earlier that promised. Dexter did not include "D washers and E- Trailer sent them to me right away so I could finish my trailer project. Overall Great Jo will do business with them again. Thanks. 159174

- 20440I-ST-60

Very nice correspondence and fast shipping Awesome to work with. 790496

- 20440I-ST-60

Well painted, one hub lock screw thread bad machined from factory. 50lb bearing nut makes it in the beginning stif turning . Normal, will ease with use if bearinf are packed with sticky marine grease. Well build and packed even with UPS tormenting the outer box shell. LOL In etrailer I beleave sind 2016 after so many counter dealer headaches and $$$$$ pricing. 786528

- 20440I-ST-60

Great product! 776660

- 20440I-ST-60

good price, fast shipping. Way to easy! 762504

- 20440I-ST-60

Quick shipping. Seems to be a quality product. Good price. Excellent customer service and question answering. Would be 5 stars if I could have found an axle short enough for my project. I had to cut down the 60” one I ordered. Not necessarily their fault, I’m just building a small trailer. Will order here again for sure 572753

- 20440I-ST-60

Easy to follow instruction. I am proud I did it!. 517892

- 20440I-ST-60

Made my trailer new again. Perfect fit, holding up well. 453109

- 20440I-ST-60

The axle came right on time when they said it would be there. It was easy to put together and all the parts were there. It was helpful that there was grease included and plenty of it! I also appreciated that the company sent new lug nuts for the tire. The previous ones were pretty old. I was trying to put a 2016 axle on a 1974 hand built trailer and this axle fit perfectly. I will definitely use etrailer again. 265051

Still working great!!
Matthew C - 01/17/2018


Ask the Experts about this Dexter Axle Trailer Axles

  • Recommended Trailer Axle and Galvanized Hub Assemblies for 2,000 lb Capacity Trailer
    The Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs # 20440I-ST-60 is powder coated, but not galvanized. The best we can do to make sure it wears well with all the salt water is to instead use the same Dexter Trailer Axle Beam with Standard Spindles - 60" Long - 2,000 lbs # T20BTR-6048 but change out the assemblies. You will want the Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - Galvanized # AKIHUB-440-2-G-2K for that additional corrosion...
    view full answer...
  • Can Spring Seats be Removed and Welded On in Different Spots on Dexter Trailer Axle 20440I-ST-60
    Yes! You can weld the springs seats to a different location on Dexter trailer axle # 20440I-ST-60. But instead of cutting off the ones on the axle and welding them back on I recommend getting new springs seats, # TRSS175 (sold in quantities of 1), and welding them on in the proper position. This will ensure that the springs seats are in good shape.
    view full answer...
  • How to Select Replacement Trailer Axle
    The features you need to match up when selecting a replacement trailer axle are 1) weight capacity; 2) the hub face dimension; and 3) the spring center dimension. Please refer to the linked diagram. It sounds like you may have a torsion type axle (that does not require leaf springs) that has what is called a drop spindle, one that allows the trailer deck height to be lower to the ground. Similarly, a lift spindle does the exact opposite; it lifts the trailer height relative to the spindle....
    view full answer...
  • Replacement 60-Inch Axle for Sea Lion Trailer
    We do offer replacement axles with a 60-inch measurement (measured from hub face to hub face when hubs are installed) and with a 48-inch measurement from spring center to spring center, which is the closest available to your 50-inch dimension. The kit you referenced, Dexter # 20440I-ST-60, includes the axle, idler hubs, bearings, races, seals, grease caps, wheel studs, lug nuts, and marine-grade wheel bearing grease. The link at right will show you all axle kits in this size, all of which...
    view full answer...
  • Trailer Axle With 2000 Pound Weight Capacity and 60 Inch Hub Face
    For a 2000 pound axle with a hub-face-to-hub-face length of 60 inches and a 4 on 4 bolt pattern Dexter Axle # 20440I-ST-60 is what you're looking for. This comes with the hubs, bearings, races, and seals. For an axle without the hubs use # T20BTR-6048. For a U-Bolt Kit to mount the axle you can use # APUBR-10
    view full answer...
  • How to Orient Axle for Installation
    When installing an axle like the Dexter Trailer Axle with Idler Hubs # 20440I-ST-60, you will want the arched part of the axle to be oriented further away from the ground with the spring seats closer to the ground (see attached picture). I have also attached a video of an axle being installed that you can reference. Once you put a load on your trailer your axle will start to straighten out due to the downward force.
    view full answer...
  • Is it Possible to Increase Weight Rating of Haul Master Utility Trailer By Changing Axle/Hubs
    In order to increase the actual weight-carrying capacity for any trailer, such as your imported Haul Master folding utility trailer model 62648, you would need to replace the weakest component part in the trailer. Upgrading the axle/hubs to ones with a higher weight rating would increase the trailer's capacity ONLY IF the axle/hub system were the lowest-rated component part. If the frame, or the hinged coupler, or the decking surface had a lower rating than the axle and hubs then changing...
    view full answer...
  • Determining Type and Weight Capacity of Trailer Leaf Springs
    The two leaf spring types you described are known as double-eye and slipper types, and they are used for different applications. You can refer to the two linked articles on trailer suspensions for lots more info on both types of trailer suspension. I also linked our main page for trailer leaf springs, both types. Click on your spring type and width at the top of the page to see all products in that category. You want to select springs based on the axle weight rating, which is usually...
    view full answer...
  • Can a Trailer Install an Axle that Measures 4 inches Longer Overall
    If the 48 inch spring center dimension of the Axle part # 20440I-ST-60 matches what your old axle has this axle will fit your trailer. Since the hub face dimension is 4 inches total longer you would end up with your wheels/tire sticking out 2 inches further on your trailer. If that wouldn't interfere with anything like fenders then the axle would work just fine.
    view full answer...
  • New axle
    The CE Smith Trailer Axle Beam, # CE33201GA, will work well for your boat trailer as long as the length and weight capacity match your current axle. You will need to measure from hub face to hub face and then from the spring seat centers to determine which axle will be the best option. 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. If the CE Smith axle matches the specs of your current axle, then...
    view full answer...
  • Correct Replacement for 2,000 lb Dexter Axle with 48" Spring Center Length
    To replace your Dexter axle, you just need to match your existing axle's weight capacity and spring center length. If you are keeping your existing wheels but replacing the hubs, you will need to match your wheel's bolt pattern as well. If your wheels have a 4 on 4 bolt pattern, you can use the Dexter Trailer Axle with Idler Hubs # 20440I-ST-60. Otherwise, if you are just replacing the axle, you can use the Dexter Trailer Axle Beam with Standard Spindles # T20BTR-6048 which work for 10"...
    view full answer...
  • Replacement Axle, Hubs and Wheels for 1997 Jayco Pop-Up Camper 8SD
    Your photo of your Jayco pop-up does appear to show a corroded outer roller bearing along with your 5.70-8 tire and 4-on-4 wheel, such as # AM30153 and the similar items shown on the linked page. Your size wheel/tire is usually found on an axle rated for 2000-lbs, like the complete Dexter axle/hub kit # 20440I-ST-60 for example. This this axle weight rating usually uses either bearing # L44643 or # L44649 but due to the condition of your bearings it will be just about impossible to accurately...
    view full answer...
  • Recommended Replacement Axles and Leaf Springs for Boat Trailer with Dual 2,000 lb Axles
    If your axles are 60 inches from hub face to hub face and 48 inches from center of spring to spring, then I recommend the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 60" Long - 2,000 lbs # 20545I-ST-60-10 or the 4 bolt hub version # 20440I-ST-60. If you have longer axles with the hub face to hub face measuring 72 inches with spring centers at 58 inches, then you will want # 20440I-ST-72 for 4 bolt hubs or # 20545I-ST-72-10 for 5 bolt hubs. With any of these axles,...
    view full answer...
  • Availability of Replacement Hub with LM12749 Inner and JL26749 Outer Bearing
    I checked our inventory and it looks like we do not offer a hub with an outer bearing that will match the outer bearing dimension on your trailer spindle. That probably means you'll have a really hard time finding replacement parts, since we do carry a large selection for the most popular set-ups on the road today. The only solution I could offer would be to replace your axle altogether with one whose spindles are more common and for which parts are readily available today. If you're...
    view full answer...
  • Upgrading the Axle on 4x8 Trailer
    In order to find the correct axle, you will need to know the dimensions from hub face to hub face and spring center to spring center, like in the photo I've added. I've also attached a link to our page with each of our available axles so you can find the correct fit.
    view full answer...
  • Recommended Trailer Axle For Haul Master 4x8 Foot Trailer
    Replacing your existing axle with the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 60" Long - 2,000 lbs # 20545I-ST-60-15 or Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs # 20440I-ST-60 will work fine as long as the Hub-face-to-hub-face length is 60 inches and spring-center-to-spring-center length is 48 inches. This will give you a higher capacity axle but you will still be limited to whatever weight capacity the weakest component of...
    view full answer...
  • Recommended Trailer Axle Kit for Fabricating Off-Road Utility Trailer
    If you are building your own firewood hauling trailer you might want to consider one of our Timbren axle-less suspension kits. These are available with idler hubs and some also have lifted spindles that can give you better ground clearance (for use in the woods when gathering your firewood). We do have standard beam axle kits too but the Timbrens can be the ideal way to go for fabricators that want an effective but simple installation of their trailer suspension. The linked page will...
    view full answer...
  • Can Square Trailer Axle Be Replaced with Round Axle
    Yes, you can replace a square axle with a round beam axle so long as it is rated appropriately. You will need a new u-bolt kit for the round 2K axle, part # APUBR-10. We offer beam axles rated up to 3500-lbs and also axle-less suspension kits from Timbren that bolt right on to the trailer frame. You can see all 2K axle kits by clicking on the link provided. Some of these come with hubs while others do not. For instance Timbren kit # A20RS545 includes the bolt-on suspension units (they...
    view full answer...
  • Trailer Axle Rated for at Least 1,500lbs and 48" from Spring Seat Center to Spring Seat Center
    We have a couple of axles that may work for you, # 20440I-ST-60 or # 20440I-EZ-60. These axles are 60 inches long, hub face to hub face, and 48 inches spring center to spring center. You will want to double check the spring seat measurement and if it is actually closer to 48 inches then either of these axles will work. Otherwise the spring seats would have to be removed and welded back on at the proper spacing by a qualified professional welder. Both axles come with idler hubs with a...
    view full answer...

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Info for this part was:

Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Jeff D
Video Edited:
Dustin K
Updated by:
Mike S

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