Right now I am running 235/85 Goodyear G614's on my 16,000# GVW fifth wheel. My pin is just under 3,000# at 2984#. I am looking to change the tires as they are carrying a 2009 date code on them... I h...
Switching rims you need to check the offset to make sure the new tire won't hit the frame or the outside wheel well openings. Then make sure you have the clearance for the larger diameter.
Now days you can get on the internet and have a product shipped to you in a couple of days. It will still cost less than a total makeover.