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CycleDerailleur shifting system
66
6 Derailleur shifting system
6.1 Basics
Usually all modern cycles have a gear shifting system installed; this depends on the cycle
model. Exceptions include children’s bikes, which may only have one gear depending on
the model.
The gear shifting system on a cycle consists of a variable gear unit and the corresponding
controls. As a result, the power provided by the rider is adapted to suit the riding speed
and route conditions.
A derailleur shifting system consists of 1 to 3 chainrings on the crankset and 6 to 12
sprockets on the rear wheel (see “Illustr.: Components of a derailleur shifting system”).
Separate controls on the right and in some cases the left-hand side of the handlebars are
generally used to shift sprockets and chainrings (see the “Derailleur shifting system / Op-
eration” chapter).
Adjustments to the gear shifting system require expertise.
xIf you lack the necessary expertise and the tools required, contact your dealer.
6.1.1 Mechanical derailleur shifting system
xWhen shifting gear, pedal only gently.
The theoretical number of gears is deter-
mined with a “chainrings × sprockets” calcu-
lation (see the “Derailleur shifting system /
Basics / Gear combinations” chapter).
The smaller the sprocket, the higher the se-
lected gear and the lower the cadence.
The larger the sprocket, the lower the select-
ed gear and the higher the cadence.
The smaller the chainring, the higher the ca-
dence.
xUse a low gear on inclines.
xUse a high gear for higher speeds on flat
routes.
Illustr.: Components of a derailleur shifting system
(example)
1 Shift cable
2 Cassette of several sprockets on the rear
wheel
3 Chainrings on the crankset
4 Chain
3
2
4
1
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