I've installed 265/70/16 Nitto Terra graplers on my stock bodied, non lifted R50 pathy. I did how ever have to trim the stock front mud flaps, and trip the front bumper, and relocate the fender liner mounts located on the front bumper. The wheels I used are 16x8J et +5
I think this size is probably the biggest all terrain tire you can go and still have your truck function without serious modifications to the fenders, bumpers, or removing the over fenders. here is a pic of the rear at almost full flex, the tire is just barely rubbing the over fender.
