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.

Read more about Bikes:  Etymology, History, Uses, Technical Aspects, Social and Historical Aspects

Other articles related to "bikes, bike":

Mosh BMX
... GT Air Show) to begin manufacturing Giant branded bikes to boost the Giant label ... These bikes were priced between $150 to $350, filling in the open entry level price gap that their Mosh labeled high-end bikes could not ... Giant made bikes using the Mosh name until 2003 when it switched to labeling all high end stunt specific parts as Mosh parts ...
... The Company's offerings consist of folding bikes, women's bikes, children's bikes, racing bikes, mountain bikes and special bikes under brand names such as Andre Kim ...
Bikes - Social and Historical Aspects - Legal Requirements
... The 1968 Vienna Convention on 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 ... The traffic codes of many countries reflect these definitions and demand that a bicycle satisfy certain legal requirements before it can be used on public roads ...
Community Bicycle Network - Non-profit Bike Shop
... as a bicycle cooperative much like similar organizations like Bikes Not Bombs in Massachusetts and Our Community Bikes in Vancouver, BC ... The main activity of the bike shop is to collect donated bikes from individuals, condominiums, small business and the City of Toronto, and refurbish the bikes for resale ... space for individuals to rent tools and fix their bikes with mechanic help ...
Cycling In Toronto - Public Bike Sharing
... There has been a recent explosion of bike sharing systems in many cities around the world ... stations, with the plan to expand in the first 2 weeks to 1000 bikes available at 80 stations located in an area bounded by Bathurst Street to the west, Bloor Street to the north, Jarvis Street to the east ... purchase yearly or monthly memberships and can then rent the bikes from any of the stations ...