Unfortunately, yes...(I think so anyway..)
I would imagine you could sell the wheels though for a decent price - at least you could here in Germany - cuz the Muggy wheels are perfect for the LST2...
I think they are too big and heavy for the Muggy though.. I have Zombies on mine - best tires I've ever seen or used.... Probably about as big as you want to go...
It's kind of unfortunate, cuz the Muggy looks so great with the stock wheels, and IMO really is a great truck... So it's dumb to have to get new wheels right away..
You can always try it with the 12T bell though and see how it goes................