With the alloy wheels, it also upgraded to radials. I think my axles are 3500 each.
I'm trying to get 5200lb axles, bigger brakes, and the Jeep isn't my only use for this. My father in law (the guy that lets me borrow the truck) runs a farm, so a 10K trailer would be useful to him for taking his tractor in for service, or for hauling wood. The Pj trailer had 16" radials.