We have damn strict regulations on tire sizes,we can only use 51mm (thats 2") larger and 102mm (thats 4") wider tires that was the biggest original tire size, and I SURE want bigger legal tires than 31"
In my registration notes says that biggest size was 205R16, that´s pretty small,ehh?? By this size I only could drive with those tiny little 31", actually driving with tiny 33" BIG CRIMINAL

Foolish laws, before late ninetees you could register any tire what just fits into your car, but now law has changed...