As I was rummaging around in some dusty old computer files at The Kneeslider, I came across this link to the Osmos hubless wheel. It's an interesting design I've seen on some concept motorcycles and cars. If success depends on looks, this wheel has what it takes. No hub allows all sorts of neat suspension possibilities, that much I get. I understand how brakes and steering and suspension work. What I don't understand is, how do you drive it? How do you get the motive power from the engine transferred to the wheel? If there is some high ratio gear set up enclosed in the small attachment area I suppose that could work but the revs necessary at that gear might be extreme. A belt around the outer rim might work. I guess the best solution would be some sort of electric drive mechanism like that found on the Aprilia Magnet. This issue might be why we don't see more of these.