On my 04, I have 305/50x20 currently. The tire is 32" tall and 12" wide. With a leveling kit, you should be able to fit a 33x12.50 tire without issue. There are a bunch of differen't metric sizes that will give you different heights and widths that will be similar as well but you probably want to stay around the 33" tall range. Tire width will all depend on the rim width and backspacing as to what will clear the suspension at full lock.