A bicycle, often called a bike (and sometimes referred to as a "pushbike", "pedal bike", "pedal cycle", or "cycle"), is a human-powered, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other. A person who rides a bicycle is called a cyclist, or bicyclist.
Bicycles were introduced in the 19th century in Europe and now number more than a billion worldwide, twice as many as automobiles. They are the principal means of transportation in many regions. They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services and bicycle racing.
The basic shape and configuration of a typical upright bicycle has changed little since the first chain-driven model was developed around 1885. However, many details have been improved, especially since the advent of modern materials and computer-aided design. These have allowed for a proliferation of specialized designs for diverse types of cycling.
The invention of the bicycle has had an enormous effect on society, both in terms of culture and of advancing modern industrial methods. Several components that eventually played a key role in the development of the automobile were invented for the bicycle, including ball bearings, pneumatic tires, chain-driven sprockets, and tension-spoked wheels.
Other articles related to "bicycle, bicycles":
... In 2011, Rhode Island completed work on a marked on-road bicycle path through Pawtucket and Providence, connecting the East Bay Bike Path with the Blackstone River Bikeway, completing a 33.5 ...
... Among many references on bicycle repair, Barnett's Manual is a comprehensive four-volume set that includes detailed coverage and diagrams of bicycle components ... Richard's Bicycle Book is a classic ...
... "Bicycle Race" is a single by the English rock band Queen ... The song is notable for its video featuring a bicycle race with nude women at Wimbledon Stadium, which was edited or even banned in several countries ...
... Early in its development, as with automobiles, there were restrictions on the operation of bicycles ... Road Traffic of the United Nations considers a bicycle to be a vehicle, and a person controlling a bicycle (whether actually riding or not) is considered an operator ... many countries reflect these definitions and demand that a bicycle satisfy certain legal requirements before it can be used on public roads ...
... Early bicycles arrived in Chicago in the 1860s ... By 1900, there were 54 bicycle clubs with more than 10,000 members ... Bicycle advocacy has been present in Chicago since the early days of the city ...
Famous quotes containing the word bicycle:
“I well recall my horror when I heard for the first time, of a journalist who had laid in a pair of what were then called bicycle pants and taken to golf; it was as if I had encountered a studhorse with his hair done up in frizzes, and pink bowknots peeking out of them. It seemed, in some vague way, ignominious, and even a bit indelicate.”
—H.L. (Henry Lewis)
“Newspapers are unable, seemingly, to discriminate between a bicycle accident and the collapse of civilisation.”
—George Bernard Shaw (18561950)
“Consider a man riding a bicycle. Whoever he is, we can say three things about him. We know he got on the bicycle and started to move. We know that at some point he will stop and get off. Most important of all, we know that if at any point between the beginning and the end of his journey he stops moving and does not get off the bicycle he will fall off it. That is a metaphor for the journey through life of any living thing, and I think of any society of living things.”
—William Golding (b. 1911)