War Wheel is more or less the same thing as the Motorcycle so upgrading to it would do nothing. So it has the same upgrades as the Motorcycle. Me too. I am actually in the Modern Era and I think I will make it to the Trans-Human Era!!! I have not been to that era since early RoM/AND. I don't think I will get much of a memory error now, I already can see the whole planet and I have defeated the other major super power. Its smooth sailing for me if I want to keep the other lesser civs alive. The most advanced rival has riflemen and I have units like Mechanized Infantry.