There is probably a yellow sticker either on the driver side corner, for the entry door, or sometimes on one of the kitchen cabinet doors. It will have the actual weight of the trailer. Then look at the gross vehicular weight rating or GVWR. You will see how much cargo weight you can carry and it will also tell you pretty much which axles are under it. For example, if the trailer is rated for 7500 or so, then it is probably 3500 pound axles. They are rated a little higher than the axle total because some weight will be carried on the hitch.
I sort of doubt that heavier than needed axles have suddenly been being used. I bet they are still using the minimum.
Larry
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