A 17-inch alloy wheel on a Camry XLE, however, was $379. For an 18-inch alloy wheel on a Chevrolet Traverse , one dealer quoted us a price of $371, but for an optional 20-inch wheel, the price was ...

The wagon—and the wagon wheel—could not have been put together in stages. Either it works, or it doesn’t. And it enabled humans to spread rapidly into huge parts of the world.