I mean, the definition of a wheel is given as:

a circular frame of hard material that may be solid, partly solid, or spoked and that is capable of turning on an axle

The little wheels on the runners definitely count since they fit the definition just fine.

But that's also kind of the point, the question is so hard to answer because people can keep thinking of more doors or wheels they hadn't considered yet. The question itself invites silliness, that's its appeal.