Please provide a link to the Vendetta tires you are thinking of using. I have wondered, myself, what the limit is and am considering building something around the rear wheels and tires on my garden tractor (Carlisle All Trails, I think), but then I have to finish my Super Bronc first and I am far from doing that any time soon. :laugh:
For mini-bike use, you need tires that are "rounded" on the tread. Unlike quads and vehicles with more wheels, you lean, at least some, to turn a mini-bike (as well as a bicycle and motorcycle) and if you have tires that are "square" like a car tire, it prevents leaning. The tires on the recent movie bat bike appear to me to be too wide and square to really work or even be remotely drivable. But, I have not seen any of the behind the scenes material for any of those movies, so I am not sure if that bike only exists in a computer or if there is a real ride-able bike used in some of the scenes. I think there maybe a practical limit, though, because the couple of bikes produced by motorcycle manufacturers (i.e. Honda, Yamaha and Suzuki), that I am aware of tend to use skinnier tires than used on Super Broncs and similar "mini-bike" type of fat tired bikes. The most recent attempt at a fat tired production bike was, I believe, the Eco-Rider, produced in Europe, although it ended up failing. I think they used tires similar in width to those found on ATV front tires.
As far as riding on the stree here are some options for fat tired bikes, these are actually street legal, although for ATV's and UTV's:
GBC Afterburn Streetforce
K572 Road Go
Paul