Another dumb tire question
#1
#2
On a 4x4, you can fit up to a 315/75-16. They will rub the frame slightly at full steering lock. On a 4x2, you can fit a 285/75-16 with minor rubbing. These are the absolute largest sizes possible. In both cases, I would go with a size smaller unless you plan on a lift in the near future.
#3