I know this is kind of apples to oranges comparison, but I went up to a 285/75/16 on my old 77 W200. No clearance issues at all. They spec'd out at almost 33" tall and I can't remember the width offhand. That truck looks like it sits up plenty high enough to accommadate a similar size. 31x10.5s no issues I'd think, 32x11.5s shouldn't be too far out as a possibilty. LOVE the truck!