Folding bike designs have clever variations of fold and/or pivot but essentially the components of most - the tube frames, geometry, wheels. etc. - are still largely similar to non-folding bikes in that they look and ride like regular bikes if just smaller (of course there are some notable exceptions - Moulton and Strida come to mind). That is not bad, of course, but I'm interested to see what this group has found on-line for truly unusual folding bike designs of the future, even if only conceptual in nature, unrealistic to manufacture and totally outlandish. I'm thinking of "from the ground up" re-thinking of the frame material and shape, drivetrain and gear systems, wheels, etc. with the specific idea of starting folding bike design without pre-conceptions of regular bikes. Yeah, I know that would make them impractical because of non-standard bike components, tooling issues, image alienation - but once free of those shackles, what Einstein ideas have been proposed? What have you found? Maybe you have your own?