Biggest tires w/o rubbing and leveling kit: 265/65/17's (31's), stock size. The next size up is 265/70/17 (32's) but they will rub a little. Its an easy fix by moving back your wheel well liner or trimming some plastic. A leveling kit could eliminate the rubbing but might not. A set of spidertrax wheel spacers would fix the rubbing issue and give your 4R a wider more aggressive stance. Check out Toytecs topout spacer or Daystars budget boost for a leveling kit. Good luck! :cheers: