Flash flip book theme of Bicycle - Version 1.0 Bicycle, also known as bike, pushbike or cycle, were introduced in the 19th century and now number about one billion worldwide, twice as many as automobiles. Bicycles are the principal means of transportation in many regions. They also have been adapted for such as children's toys, adult fitness, military and police applications, courier services and bicycle racing. Maybe you can never imagine that besides all these usage, bikes can also become brilliant photographic models. We are going to show you special charm of bikes, so we picked these bicycle graphics as background.