Most people figure out what size tires they want to run, and then pick the lift kit that will allow the tires of choice to fit. And sometimes they simply step up in size not really knowing the repercussions of such an upgrade. Size isn't everything. Running large tires has never been simply picking and bolting them on for me. I feel like you need to design the vehicle around the tires you choose.

So is there a vehicle out there that I think can actually use 54-inch tires? Not really, unless it's totally custom built. Seems like a waste of tires to me unless you're running 500 plus horsepower, have somewhere in the neighborhood of 7:1 gearing, a drivetrain that can stand up to the abuse it's likely to get, and a wheelbase of 120-plus inches. And even then I'd be skeptical of anything that didn't have the fenders thoroughly cut to keep the center of gravity low.
On the plus side, the 54-inch Bogger is a much more useable tire than the Michelin heavy truck tires. The Bogger carcass actually flexes just rolling it around empty. The Michelins won't budge until you put nearly 3000 pounds on 'em (many are rated to 9000 pounds each!). And even then the traction they offer is pathetic in comparison to a similarly-sized light-truck mud tire like the 54-inch Bogger or 49-inch IROK.

How would you run 54-inch Boggers?