Giant momentum Anleitung Seite 24

WARNING: Never move the shifter while pedaling backward, nor pedal backwards immediately after having
moved the shifter. This could jam the chain and cause serious damage to the bicycle and cause you to lose
control and fall.
b. Shifting the Rear Derailleur
The rear derailleur is controlled by the right shifter.
The function of the rear derailleur is to move the drive chain from one gear sprocket to another. The smaller
sprockets on the gear cluster produce higher gear ratios. Pedaling in the higher gears requires greater pedaling
effort, but takes you a greater distance with each revolution of the pedal cranks. The larger sprockets produce
lower gear ratios. Using them requires less pedaling effort, but takes you a shorter distance with each pedal
crank revolution. Moving the chain from a smaller sprocket of the gear cluster to a larger sprocket results in a
downshift. Moving the chain from a larger sprocket to a smaller sprocket results in an upshift. In order for the
derailleur to move the chain from one sprocket to another, the rider must be pedaling forward.
c. Shifting the Front Derailleur
The front derailleur, which is controlled by the left shifter, shifts the chain between the larger and smaller
chainrings. Shifting the chain onto a smaller chainring makes pedaling easier (a downshift). Shifting to a larger
chainring makes pedaling harder (an upshift).
d. Which gear should I be in?
The combination of largest rear and smallest front gears (fig. 19) is for the
steepest hills. The smallest rear and largest front combination is for the greatest
speed. It is not necessary to shift gears in sequence. Instead, find the "starting
gear" which is right for your level of ability — a gear which is hard enough for
quick acceleration but easy enough to let you start from a stop without
wobbling — and experiment with upshifting and downshifting to get a feel for the
different gear combinations. At first, practice shifting where there are no
obstacles, hazards or other traffic, until you've built up your confidence. Learn to
anticipate the need to shift, and shift to a lower gear before the hill gets too steep.
If you have difficulties with shifting, the problem could be mechanical adjustment.
See your dealer for help.
WARNING: Never shift a derailleur onto the largest or the smallest
sprocket if the derailleur is not shifting smoothly. The derailleur may be out
of adjustment and the chain could jam, causing you to lose control and fall.
e. What if it won't shift gears?
If moving the shift control one click repeatedly fails to result in a smooth shift to the next gear chances are
that the mechanism is out of adjustment. Take the bike to your dealer to have it adjusted.
2. How an internal gear hub drivetrain works
If your bicycle has an internal gear hub drivetrain, the gear changing mechanism will consist of:
• a 3, 5, 7, 8, 12 speed or possibly an infinitely variable internal gear hub
• one, or sometimes two shifters
• one or two control cables
• one front sprocket called a chainring
• a drive chain
a. Shifting internal gear hub gears
Shifting with an internal gear hub drivetrain is simply a matter of moving the shifter to the indicated position
for the desired gear ratio. After you have moved the shifter to the gear position of your choice, ease the pressure
on the pedals for an instant to allow the hub to complete the shift.
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