3000 lbs max-payload could well be the dealership was lying to me.
An interesting story - When I visited CampingWorld, the service department couldn't find any towing capacity for my vehicle(via the towing chart). Then she called dealership(who sold me the TV), and confirmed that the max payload and towing capacity. Those numbers(agreed increditably high) are different than what the yellow stick says(which is 1814 lbs). The manager, who said she has been working in the industry for 25 years, said "The yellow stick could be off if there are some customization package installed to the TV", and for a fact, I knew from the windowsticker the previous owner had bought it with the towing package(not sure whether it's the max-tow-package though).
With that being said, I still wouldn't trust those numbers, wouldn't put crazy load on it, but thinking loaded TT 7000 lbs shouldn't be too much for it.
The current tire does have 50 PSI rated. See the attachment below.
