What is the largest wheel you can put on a 2014 Toyota FJ Cruiser?

[Mike Clark]

I just picked up a low mileage 2014 Toyota FJ Cruiser. I've always wanted one of these and found a pretty good deal on Craigslist. First is first, need to ditch these stock wheels. Would you happen to know the largest wheel size that can be put on this thing with out body modifications?