| A bicycle is a simple, machine, but it
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| | Multiple gears on a bicycle helps change
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| involves a lot of mechanization. A
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| | the distance the bicycle moves forward
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| bicycle is made up of many parts put
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| | with each stroke of the pedal. A mountain
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| together. Perfect synchronization in the
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| | bike has 24 gears. Chain wheels are the
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| functioning of all the parts is essential
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| | gears at the front. Most bikes have 2-3
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| for the efficient working of the bicycle.
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| | chain wheels. The freewheel, at the rear,
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| Modern day bicycles include many new
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| | has 5-9 gears on it. It spins freely in
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| elements, but a standard bicycle has the
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| | one direction and locks in the other.
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| same main parts. The basic parts of a
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| | This enables the bike to coast, when not
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| bicycle comprise; the frame: A bicycle's
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| | pedaling. There are front and rear
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| frame is made up of many tubes welded
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| | derailleurs to change the gears.
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| together. The front fork holds the front
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| | Ball bearings in a bicycle serve to
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| wheel and is movable.
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| | reduce friction. Ball bearings are found
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| The wheels: wheels include a hub, the
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| | in the front and rear hubs for the
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| spokes, metal rim and rubber tyres. The
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| | wheels, the pedals, the fork tube, the
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| brakes: they include the actuators on the
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| | bottom bracket and in the freewheel.
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| handlebar, brake cables, brake pads and
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| | These bearings need to be periodically
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| calipers. The chain and gears: they
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| | cleaned and greased. Expensive bicycles
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| consist of the front chain wheels, the
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| | have sealed bearing cartridges that don't
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| rear freewheel, the shift levers on the
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| | need lubrication.
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| handlebars and the cables. Other bicycle
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| | Materials used
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| parts include the seat, seat posts,
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| | Bicycles need to be strong and
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| handlebars, handlebar stem, bicycle
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| | lightweight. Alloy steel is used for
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| lights, dynamos, cranks, and pedals.
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| | making the frames and fork tubes. The
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| Gears and ball bearings
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| | handlebars, seat posts and brake levers
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| Most racing bicycles have gears. Gears
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| | are made of aluminum alloy. Aluminum
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| basically serve the purpose of reducing
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| | alloy frames are affordable. Carbon
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| the size and diameter of the wheel. Gears
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| | frames, titanium and advanced steel
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| adjust the direction of rotation.
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| | alloys frames are also available.
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