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31 Operating elements
1
Fig. 10: Gear shift controls
*
* Bicycle with electronic gear shift system; see
32 Derailleur system
4
5
6
Fig. 11: Derailleur system components
32.1 Method of operation
Depending on the model, a bicycle with a derailleur system is fitted with 1 to 3 chain rings
of different sizes at the same height as the pedals and 7 to 12 sprockets of different sizes at
the rear wheel hub.
The different combinations of chain rings and sprockets over which the chain can run create
the different gears (chain "transmission").
High transmission (more effort/lower pedalling frequency):
If the chain is running over one of the smaller sprockets and larger chain rings, pedalling is
harder, but the bicycle covers a longer distance for each pedal rotation.
Low transmission (less effort/high pedalling frequency):
If the chain is running over one of the larger sprockets and smaller chain rings, pedalling is
easier, but the bicycle covers a shorter distance for each pedal rotation.
The required gear is selected using 1 or 2 operating elements on the handlebar, depending
on the configuration.
GEAR SHIFT SYSTEM
2
3
˃ Chap. 34 "Electronic gear shift system" on page 51
3
2
1
1
Twist-grip shifter
2
Rear shift lever
3
Front shift lever
1
Chain
2
Chain ring (1-3)
3
Front derailleur
4
Gear cable
5
Sprocket
6
Rear derailleur
47
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