50
a
b
c
d
In the case of shifters pressing the large shifter
(thumb shifter) moves the chain towards the larger
chainwheels/sprockets.
That means that any gear shift made by pressing
the large thumb shifter on the right produces a
lower gear. This is an indexed shifting system with
the option of shifting several gears with one action.
Actuating the large thumb shifter on the left produces
a higher gear.
Pulling the small lever
(a)
located in front of the han-
dlebars from the rider’s viewpoint and actuated with
the index finger (index finger lever) shifts the chain
towards the smaller chainwheels/sprockets, i.e. on
the right side to the higher gears and on the left side
to the lower gears.
I
Read in any case carefully the operating
instructions of the gear manufacturer on
this CENTURION CD-ROM. Make your-
self familiar with your new gears in an area free of
traffic, if necessary. If you are in doubt or if you
have any questions, contact your CENTURION
dealer.
The principle of twist grips is different
(b)
. Turning the
right-hand grip towards you makes for a lower gear
ratio, while the same movement on the left produces
a higher gear – and vice versa. The shifting direction
may vary in this case, as well.
G
Always wear straight-cut trousers or use
trouser clips
(c)
or the like to make sure
your trousers do not get caught in the
chain or the chainwheels. Risk of an accident!
G
Shifting gears under load, i.e. while ped-
aling hard, can make the chain slip. At
the front derailleur the chain may even
slip off the chainwheels and result in an acci-
dent! At the very least the service life of the chain
would be reduced considerably.
G
If there is play between bearing spindle
and cranks, they can sustain damage.
Risk of breakage!
A
Avoid gears which involve an extremely
oblique run of the chain as this will in-
crease wear!
A
It is crucial when switching gears to con-
tinue pedaling smoothly and without too
much force. Do not shift under load, and
in particular not at the front derailleur, as this will
shorten the service life of your chain considera-
bly. Furthermore, this can lead to a chain-suck,
i.e. the chain can get jammed between chainstay
and chainwheels.
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