Bicycle

A bike, likewise called a bicycle or cycle, is a human-controlled or engine fueled, pedal-driven, single-track vehicle, having two wheels joined to a casing, one behind the other. A bike rider is known as a cyclist, or bicyclist.

Bikes were presented in the nineteenth century in Europe, and by the mid 21st century, more than 1 billion were in presence at a given time. These numbers far surpass the quantity of vehicles, both altogether and positioned by the quantity of individual models created. They are the chief methods for transportation in numerous locales. They likewise give a well known type of entertainment, and have been adjusted for use as kids' toys, general wellness, military and police applications, dispatch administrations, bike dashing, and bike stunts.

The essential shape and design of a run of the mill upstanding or "security bike", has changed close to nothing

since the principal chain-driven model was created around 1885.

Be that as it may, numerous subtleties have been improved, particularly since the coming of current materials and PC supported structure. These have took into account an expansion of particular structures for some sorts of cycling.

The bike's development has enormously affected society, both regarding society and of propelling current mechanical techniques. A few parts that in the end assumed a key job in the advancement of the vehicle were at first designed for use in the bike, including metal rollers, pneumatic tires, chain-driven sprockets and strain spoked wheels