I AGREE WITH 928GT. I'VE HEARD OF PEOPLE USING 2 DIFFERENT TIRE SIZES FRONT AND BACK, BUT JUST LIKE A 4X4 PICKUP TRUCK IT SHOULD WORK THE DIFFS ALOT HARDER. IF YOU WERE IN MUD 24-7 THEN IT WOULD'NT MATTER MUCH, BUT ON DRY LAND IT WOULD STRESS THE WHOLE WORKS.