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Cycle Derailleur shifting system
61
6 Derailleur shifting system
6.1 Basics
Usually all modern cycles have a gear shifting system installed; this depends on the cy-
cle 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 correspond-
ing 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 /
Operation” 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” cal-
culation (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.
6.1.2 Electronic derailleur shifting system
An electronic derailleur shifting system is powered by a rechargeable battery which pro-
vides electricity for the front and rear derailleurs. It functions the same way as a mechan-
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
82

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