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Dexter Axle Trailer Axles - Leaf Spring Suspension - 20440I-ST-72 Review

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Review of Dexter Trailer Axles 20440I-ST-72


Today we're going to review part number 20440I-ST-72. This is the Dexter Trailer Axle with the standard spindles, comes with the idler hubs with the four on four inches bolt pattern. This axle is 72 inches long and has a 2,000 pound weight capacity. Now this part will include the axle here, the two idler hubs, comes with the inner and outer bearings, now the bearing races are included, they are pre-installed in the hubs already, comes with the grease seals, the dust caps, half inch lug nuts, and a tub of the marine grade wheel bearing grease. Now this axle beam will act as part of your trailer suspension system, you can use it to replace an axle on your trailer or you can also use it to fabricate a suspension to fit your specific application. It is constructed of a high strength steel. Also if you'll notice this is an underslung design and by that, that means the spring seats right here, there's one here, one back here. They're welded to the underside of the axle and this is for mounting leaf springs to.

This will give you a low ride height which makes it easier to load and unload your trailer. You'll also notice it does use straight spindles, there's no drop to them. It's a standard grease application spindle, it does include the castle nut and the cotter pin. Now when we do ship them, we do protect the ends there from any damage. Basically, the machine finish of the spindle part right here will be coated with grease and then bubble wrap around it and then they use these very heavy corrugated tubes that will just slide over it to protect it and then they're wrapped again to protect it from any damage during shipping. Now the spring seats and the spindles are already welded onto the axle. Now on the trailer axles, you might notice, it might be hard to see in this video, but the center will actually be higher, it does bend at the center, the axle goes up and then down again. This bend will create a zero camber angle to give you even road to tread contact across the width of the trailer tires you have on this axle. Basically what happens is when this is on your trailer and the weight is put on, it would push down on that axle, sort of straighten it out and that will ensure that, this bend will ensure that the angle of your wheels will be correct for towing needs.

This will help as far as straight line acceleration and gives you a nice steady controlled towing. Now these idler hubs are a cast iron, they are very sturdy and durable, does have a bolt pattern of a four on four inch bolt pattern, does use a wheel stud diameter of a half inch so it does use these included half inch by 20 lug nuts and it will accept wheel size from 10 inch to 13 inches. Now the weight capacity on the axle itself is 2,000 pounds. The outer diameter of this tubing of the axle is one and three quarter inches. The diameter on the spindle is one and one sixteenths inches. Now basically on an axle there are many multiple ways to measure the length of an axle beam but basically the most accurate way is going to be the hub face to the hub face or the spring center to the spring center. Both of these will give you the most accurate measurements and on the hub center or the hub face to hub face length. Basically, it does require the hubs to be already on the axle and what you'll be doing is measuring from the base of one wheel stud on this hub, go down the axle to the base of the other wheel stud on hub right at the other side. I just want to give you an idea here, the hubs aren't on it but I can give you an idea of where they'll be positioned.

If we put a ruler on it, it will give you a hub face to hub face length on this one of 72 inches. Now the other one would be the spring center to spring center length. Actually when you measure that, that will actually give you the approximate width of your trailer itself and that's measured from the center of this spring seat to the center of this spring seat on the other side. On this one, we can get you an accurate measurement, center to center, you can see is going to be right at 58 inches. Basically, if you're going to be replacing your trailer's axle, you should be able to figure out which type you need just by determining the trailer's capacity, the bolt pattern of the wheels you're using, the brake type if it uses brakes and then those two lengths, either the hub face or the spring center lengths. That should do it for the review of part number 20440I-ST-72. This is the Dexter Trailer Axle with the standard spindles and the idler hubs in the four on four inch bolt pattern. .


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R

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