e-bike

A woman rides her electric bike without a helmet in Beijing. Photo by Ethnocentrics.
From TIME.com:
On the Streets of China, Electric Bikes Are Swarming
June 14, 2009
By Austin Ramzy
In China, electric bicycles are leaving cars in the dust. Last year, Chinese bought 21 million e-bikes, compared with 9.4 million autos. While China now has about 25 million [...]