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the handlebars to control the shifting unit23,
which shifts the chain to the various chain-
rings and pinions.
The shifting unit is controlled either mechan-
ically or electronically.
17 Chainring 20 Shifting unit
18 Chain 23 Pinion
47 Control element on handlebar (not shown)
23
18
17
20
Fig.19: Derailleur gear components
15.1.2 Use of derailleur gears
i
Important: Despite perfectly
adjusted derailleur gears, noise can
be generated by a chain running at
an angle. Noise of this sort is nor-
mal and does not cause any dam-
age to the shifting components.
WARNING!
Risk of accident and injury
The use of faulty, incorrectly adjusted
or worn gear shift components is dan-
gerous and can lead to falls.
In case of uncertainty, be sure to
have the gear shift checked and, if
necessary, readjusted by a FLYER
specialist dealer.
NOTE! Risk of damage!
Incorrect shifting can damage the gear
shift.
Do not pedal backwards when
changing gears.
23 Depending on the model, the shifting unit is also called
"rear derailleur" or "front derailleur".
i
Important: In addition, observe the
corresponding manufacturer's
instructions for your derailleur gears
or for your control element.
Make sure that the crank rotates when shift-
ing (forward), but do not pedal too hard.
For shifting with mechanical derailleur
gears:
Push the lower lever on the control
element up (1 or 2 steps) to shift up one
or two gears.
Push/pull the upper lever on the con-
trol element down (1 or 2 steps) to shift
down one or two gears.
For shifting with electronic derailleur gears:
Observe the associated manufacturer's
instructions for your electronic derailleur
gears.
i
Important: The battery of electronic
derailleur gears must be charged
regularly. The corresponding infor-
mation can also be found in the cor-
responding manufacturer's manual
for your electronic derailleur gears.
15.2 Hub gears
15.2.1 Functionality of hub gears
The shifting mechanism of hub gears is
based on the so-called planetary gear in the
rear hub.
You shift by using the control on the handle-
bars to control the shifting unit in the rear
hub.
22 Rear hub 29 Front
pulley
28 Belt 30 Rear
pulley
47 Control element on handlebar (not shown)
28
30 29
22
Fig.20: Hub gears components 24
24 Figure with belt drive; however, there are also e-bikes
with chain drive, which have hub gears.
197


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