How to estimate trailer capacity?
A while back I had posted that I got a little cargo trailer for free, and I did do some work to it (new boards on the deck, paint, new lights, etc) but I would like to know what my axle/springs can handle.
I know the tires are only rated to 590lbs (each) and would like to get larger ones with higher capacity, but I do not want to if the axle/springs are not up to it.
The wheels are 4 lug; and the axle is a square tube axle. Ive read that if you measure the diameter of the axle, you can get a good 'guess' on the weight rating; but thats only for round axles, isnt it?
As for the leaf springs, I have NO clue how to find out what they are rated for.
I DO know for a fact that the trailer deck itself will hold a fair bit of weight (Id say its built like a 3500lbs deck), but as of now, I KNOW the tires ARE a limiting factor, and the axle/springs may be as well.
I honestly just would like to know what is safe to haul; more than what I could haul at the max (I did haul a trailer load of scrap batteries; weighing around 1100lbs... that was sketchy enough for me on those tires even though I only went about 1 km!).