Merida City Bikes, Руководство по эксплуатации

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47
e
f
g
h
U
MERIDA pedelecs have only one chainwheel.
As a consequence there is no front derailleur
and no shifter on the left handlebars.
I
Read the gear manufacturer’s operating in-
structions on this MERIDA CD-ROM carefully
and practice shifting gears until you are fa-
miliar with it before you set off for the first time.
Functioning and operation
Derailleur gears always work according to the following
principle:
Large chainwheel (front)
– heavy gear – bigger transmission
Small chainwheel (front)
– easy gear – smaller transmission
Large sprocket (rear)
– easy gear – smaller transmission
Small sprocket (rear)
– heavy gear – bigger transmission
Normally the shifters are mounted as follows:
Right shifter – sprockets (rear)
Left shifter – chainwheels (front)
Modern 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 re-
duces power transmission efficiency and hastens wear
of the chain.
The chain runs unfavorably when the smallest chain-
wheel is used with one of the two or three outermost
(smallest) sprockets
(d)
or when the largest chainwheel
is used with one of the inmost (largest) sprockets
(e)
.
The bottom bracket
(f)
is the interface between cranks
and frame. There are different designs, in some cas-
es the bearing spindle is part of the bottom bracket, in
some other cases it is integrated into the right crank.
Sealed bottom brackets are maintenance free and de-
livered 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
(g) . If you notice any
play, contact your MERIDA dealer immediately.
Depending on the gear system, gear shifting is initiated
by actuating a shifter
(h) , a brake and shift lever unit
or by a short turn of the wrist with twist grips. Contin-
ue pedaling during gear shifting, however, with reduced
pedaling force.
Please find below the principles of the shift lever types
and their operation. It is, however, also possible that
your new MERIDA bike has a gear system that is not
listed below.