Volkswagen bik.e

Volkswagen has rolled out its first ever two-wheeler at the Chinese auto show. A very cool looking piece of mobility art that looks a little like a small bicycle without the pedals, the battery-powered device has definitely been designed with both form and function in mind: the whole thing folds quickly down into a flat disc that fits quite nicely into the spare tire compartment found in the bottom of most trunks.
With a range of 20 kilometers (12.5 miles), it's not meant for long distance treks but rather as a supplement to your car. Its official top speed is 20 km/h (12.5 miles per hour) to allow Germans to ride it helmetless, though word on the street says the version at the show could go much faster.

For More: http://green.autoblog.com/2010/04/28/volkswagen-bik-e-replaces-spare-tire-with-electric-mobility-devi/