Cycling
By: Alexandru Grama
Bicycle informations
Bicycles were introduced in the 19th century in Europe. At the beginning of the 21st century there were
more than 1 billion bicycles. There are far more bikes than cars. Bicycles are the main means of
transport in many regions. They also provide a popular form of recreation and have been adapted to
be used by children as well.Bicycles are used for fitness, military applications, courier services, bicycle
racing.
The basic shape and configuration of a typical upright bicycle has changed little since the first chain
model was developed around 1885. However, many details have been improved, especially with the
advent of modern materials and computer-aided design. In the 21st century, electric bicycles have
become popular.
The invention of the bicycle had an enormous effect on society, both in terms of culture and the
advancement of modern industrial methods. Several components that played a key role in the
development of the automobile were originally invented for use in the bicycle, including ball bearings,
pneumatic tires, chain sprockets, and tension spoke wheels.
Bike styles
There are many styles of bikes that count:
Downhill
Downhill which is often used for climbing or descending a route
Dirt
Dirt which is suitable for stunts because it has only one speed and
because of this the chain falls very rarely,
BMX
The BMX which is very popular
for its size, has no brakes or
gears at all and weighs around
10 kilograms
That was my project!!!
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