I have a 2001 Ford F-150 with 265/70/16 stock wheels and wondering what the rim size is and what sixe tire I could move up to without a lift or leveler?

 

7 inch wide rim (16x7) assuming it is a 4x4 (since it has stock 265's) 285/75/16 will fit great, no rubbing and they will fill up the wells nicely. check my gallery for pics, same diameter tire just a 17 inch rim instead of a 16 incher....