Bicycle

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A bike, alternatively known as a cycle or bicycle, is a human-powered, pedal-operated single-track vehicle boasting two connected wheels. Cyclists or bicyclists are individuals who ride these vehicles. Bicycles emerged in late 19th century Europe and have since surpassed one billion productions globally; this number exceeds that of cars in terms of both total units and individual models. In numerous regions, bikes serve as the principal mode of transport while also offering a popular recreational activity. Bicycles have been adapted for uses such as children's toys, fitness routines, military and police duties, courier services, racing events, and stunts. The basic structure of an upright or safety bicycle has remained consistent since its chain-driven inception around 1885; however, improvements in materials and technology have led to a variety of specialized designs tailored for different cycling purposes. Bicycles greatly impacted society - not only culturally but also by advancing industrial methods. Several key automobile components were initially developed for bicycles, including ball bearings, pneumatic tires, chain-driven sprockets, and tension-spoked wheels.