This bike is so damn cool looking I keep forgetting that it can folded up like a pretzel. No word on sturdiness (it’s still a concept, though), but as you can see the seat extends from the frame that runs parallel to the ground. This looks to be the key to the Cube Urban Street Bike Concept’s contortion like abilities. Also, it looks like it can be folded with wheels on to accommodate a medium sized car, or the wheels can be removed to achieve ultimate compactness.
More pics after the ‘leap’ [Gallery=8]
More info here.