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PEDAL DRIVE
18 General information
The term "pedal drive" refers to the process or related unit with which the bicycle is (manu-
ally) propelled.
The power applied when you push the pedals (pedalling) is transmitted to one of the wheels
via the chain (chain drive). In turn, the propelled wheel sets the entire bicycle in motion.
INFORMATION
It is generally the rear wheel that is propelled in this way.
19 Chain drive
19.1 Method of operation and handling
3
Fig. 3: Chain drive components
The chain of the bicycle runs over two gear wheels, the teeth of which interlock with the
free openings between the individual chain links that make up the chain.
The gear wheel at the same level as the pedals that rotates when you start to pedal is known
as a chain ring. The rotation of the chain ring is transmitted to the sprocket on the wheel
axle via the chain. The rotating sprocket also causes the wheel to rotate, which propels the
entire bicycle and sets it in motion.
INFORMATION
In principle, it is possible to open a chain and to close it again. Individual chain links
can be inserted or removed to achieve the perfect chain length.
1
PEDAL DRIVE
1
Chain
2
Chain ring
2
3
Sprocket
33
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