This Wheel is Not a Circle

See this? It's an oval wheel. If you ride on an oval wheel, it's going to be the bumpiest ride of your life. Unless you look at it from this angle. From this exact point of view, it's a perfect circle. So I put the axle through it at this exact angle. I know what you're thinking. That looks completely unbalanced. It looks like it's going to wobble everywhere. But here's the That looks completely unbalanced. It looks like it's going to wobble everywhere. But here's the thing. The axle stays the exact same distance from the ground the entire rotation, which means it