Amen Design Company has created a motorcycle with wheels without axles and spokes. It’s an amazing invention, but the main thing that ride it no problem. In so far as I understood the principle of operation is as follows – that the wheels are in place, and tires spinning on finger bearings.
“Among the advantages of this kind of wheels (in addition to the unusual appearance) – less weight, better braking, reducing vibration and removing some of the other technical limitations, but make them difficult and expensive, so they are not widely known.”