I ran 31x12.5 Boggers & found my 5th gear to be useless. The added ground clearance was nice, but with a tire that wide alot of trimming was nessasary. Even trimming the fenders back even with the rocker panel would still rub the fender. At that time I had about 4" of suspension lift & 1 1/2 body lift. If ya go with 31's do not go as wide as I did.

http://img.photobucket.com/albums/v336/rockfreek/Rokia/MVC-030S.jpg

This photo is before the SAS with those tires


Why go around? When You can go over!