Thanks for the thought on Toyota, I'll check it out, but in the dark recesses of my memory having owned a little Toyota-based 4X4 Chinook motorhome, there was something different Toyota wheels. All I remember was that Mine was outside the factory recall when her dual wheels began cracking at the welds between rim and center. After some research, I ended up having to buy two Toyota factory wheels that were just as expensive as they sound. But those were 15", and a long time ago. I have no idea what the Japs have been up to since. . . though I see recalls are back in style at Toyota.
Phil