I object to this being framed in terms of vehicle mass, because what counts most is mass/area = ground pressure. Many big fat tires distribute the weight. It i

I object to this being framed in terms of vehicle mass, because what counts most is mass/area = ground pressure. Many big fat tires distribute the weight. It is also much more relevant in places with sub-zero nights, i.e. a thaw/frost cycle. In relatively warm places like Australia this effect does not occur. Roads are much cheaper per km than in places with snow/ice, even with heavy vehicles.