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ENGLISHENGLISH TREKKING AND TREKKING-PEDELEC | ORIGINAL OPERATING INSTRUCTIONSORIGINAL OPERATING INSTRUCTIONS | TREKKING AND TREKKING-PEDELEC
b ca e fd
Operation and control
Derailleur gears always work according to the following principle:
Large front chainring – high/heavy gear – higher gear ratio
Small front chainring – low/easy gear – lower gear ratio
Large rear sprocket – low/easy gear – lower gear ratio
Small rear sprocket – high/heavy gear – higher gear ratio
Normally, the shifters are mounted as follows:
Shift lever right – rear sprockets
Shift lever left – front chainrings
Modern BERGAMONT city/trekking bikes can have up to 30 gears. As there are,
however, overlapping ranges, actually 15 to 18 gears are usable. It is not advisable to
use gears which involve an extremely oblique run of the chain, as this reduces power
transmission efficiency and hastens wear of the chain.
An unfavourable run of the chain is when the smallest chainring is used with one of
the two or three outermost (smallest) sprockets (c) or when the largest chainring is
used with one of the inmost (largest) sprockets (d).
The bottom bracket (e) is the interface between cranks and frame. There are different
designs, in some cases the bearing spindle is part of the bottom bracket, in some
other cases it is integrated into the right crank. Sealed bottom brackets are mainte-
nance free and delivered without play ex works. The bottom bracket in the frame
must be checked for play at regular intervals.
Also check at regular intervals whether the cranks are firmly attached to the bearing
spindle or whether there is play. Grab the crank and try to jiggle it forcefully. It must
be absolutely free of play (f). If you notice any play, contact your BERGAMONT dealer
immediately.
GEARS
DERAILLEUR GEARS
The gears of your BERGAMONT bike (a+b) serve to adjust the gear ratio to the terrain
you are riding on and the desired speed.
A low gear (where in the case of derailleur gears the chain runs on the small chainring
and a large sprocket) allows you to climb steep hills with moderate pedalling force.
You must, however, pedal at a faster pace. High gears (large chainring, small
sprocket) are for riding downhill. Every turn of the pedals takes you many metres
forward at correspondingly high speed.
DANGER!
G
Continue pedalling at reduced cadence during gear shifting, however, at clearly
reduced pedalling force. In particular when shifting through the chainrings continue
pedalling slowly and without force.
DANGER!
H
With BERGAMONT pedelecs reduce the cadence and the pedalling force shortly
before you start shifting. In doing so there is a short interruption of the drive. If you
continue pedalling, the high chain forces could result in a chain failure.
CAUTION!
A
Practise switching gears in a place free of traffic until you are familiar with the
functioning of the levers or twist grips of your BERGAMONT bike.
NOTE!
U
BERGAMONT pedelecs have only one chainring. As a consequence there is no
front derailleur and no shifter on the left handlebars.
NOTE!
I
Read the gear manufacturer’s manual carefully and practise shifting gears until you
are familiar with it before you set off for the first time.
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