My dad is looking at getting some wheels for his D-Max, they are 18" wheels, but does anyone know of a tire that is heavy enough for a D-MAX that fits an 18" rim? The size we are looking for is about 31-33" Tire. I haven't found very many tires in that size in the right weight rating. I think is has to be like a D or E, or equal to one. Any ideas? B.T.W.....Has anyone ever heard of Nokian Tires?