How To Determine the Weight Capacity For a Trailer Axle with Spindle Dimensions that Match 42

Question

Question:

I have a 1961 Ziemna flat bed trailer it has 2 two 2 1/4 x 2 1/4 i square axles out side hub face to out side hub face is 73 1/2 in the in side bearing is a 25577 in side ID 1.75 in the out side bearing is 15125 in side ID 1.25 in the hub is a 6 on 5 1/2 1/2 lug studs the tire is 8 - 14.5 LT the spring is 26 in eye to eye 5 leafs that are maid 2 in wide x 1/4 in thick the square ael do not have a tag or plte on the so if u can help me determine its capacity for it

asked by: Ron B

0

Expert Reply:

A trailer as old as yours would be pretty hard to determine an overall capacity for, but since you have 6 lug hubs that would indicate by todays standards you have a capacity most likely between 5,200 and 6k which matches pretty close to the spindle dimensions you listed as well.

The spindle dimensions match the 42 spindle like the part # TRU37FR which has a 5,200 lb capacity.

expert reply by: Jameson C

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Answer 1

So the install of a spindle like the #TRU97FR really needs to be done by a welder who has done the job before and has the special jigs for the job. It's a precision job and we can't recommend a method for it aside from taking it to someone…

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Answer 2

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 3

All of the TPMS sensors we carry are closed systems so they wouldn't be compatible with the GM sensors you have, you would need to get these from GM directly. I also can't speak to the fitment of GM's sensors with the stems on a 5th wheel…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 6

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 7

The two sizes you mentioned are pretty similar and fit many of the same 15 inch wheels. The 205/75-15 fits rim widths of 5 inch to 6-1/2 inch whereas the 225/75-15 fits widths that are 5 inch to 6 inch. The 205 is 27.1 inches tall and the 225 is 28.4…

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Answer 8

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 9

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 10

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 11

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside…

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Answer 12

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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How To Determine the Weight Capacity For a Trailer Axle with Spindle Dimensions that Match 42

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