54
Bicycle gears
21.2 Hub gears
This operating manual describes the use of
common commercial gear components on a
pedelec as an example.
If your components are different, you will
find specific information in the respective
operating manual or on the website of the
manufacturer.
If you have any questions about assembling,
maintaining, setting up or operating the gears,
please contact your pedelec specialist retailer.
21.2.1 Operating hub gears
21.2.1.1 Shimano 7/8 gear grip shift
(Nexus/Alfine)
To change gear, turn the gear lever in the de-
sired direction.
One turn towards the 1 results in less re-
quired pedal force, e.g. for uphill.
One turn towards the 7 results in more re-
quired pedal force, e.g. for downhill.
This gear concept from Shimano is generally
also applicable for the other manufacturers of
grip shift systems.
21.2.1.2 Shift lever 8/11 gear (Alfine)
The shift levers are equipped with the 2-WAY
RELEASE and MULTI RELEASE function, i.e.
with one movement two gears can be changed
and the lever can either be pushed or pulled.
Both levers (A) and (B) return to the starting
position after being applied.
• If the rear wheel of your
FLYER is difficult to turn, the
brake shoes and/or the hub
likely have to be greased. This work
should be done by a specialist retailer.
• Gears can also be changed while you
are pedalling. Take a little pressure
off the pedals during gear changes.
Otherwise, depending on the addi-
tional motor performance, the inter-
nal excess load protection system of
the hub may prevent the gear change.
In exceptional cases this can also
cause gear changing noises within
the hub. These noises are harmless.
• The chain has to be immediately
checked or tensed if it comes off
the sprockets. You are required to
completely replace the sprocket/
chain ring if the entire adjustment
range of the rear wheel is maxed
out in the frame.
Ensure that the correct lock
washer is installed on both
sides of the hub and the axle nut
is screwed on with the correct torque
(see chap. 33.3 “Torques for screwed
connections”).
If only one lock washer is fitted or
the torque is incorrect, this can lead to
failure. This can cause the hub to twist
in the rear fork. It is possible that the
handlebars may be pulled in one direc-
tion as a result of the twisted gear ca-
ble. In turn, this could result in a serious
accident.
Display
Revo shift
lever
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