The main difference between airplane wheels and automobile wheels is that airplane wheels are much larger. This is because an airplane wheel has to support much more weight than a car wheel. Another difference is that airplane wheels are designed to spin very fast, while car wheels are not. This is because an airplane needs to generate a lot of lift to stay in the air, and the faster the wheels spin, the more lift they generate. Car drivers don't need as much lift, so their wheels don't need to spin as fast.