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to get a feel for the different
gear combinations. At rst,
practice shifting where there
are no obstacles, hazards or
other trafc, until you’ve built
up your condence. Learn to
anticipate the need to shift, and
shift to a lower gear before the
hill gets too steep. If you have
difculties 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 innitely variable internal gear hub
• one, or sometimes two shifters
• one or two control cables
• one front sprocket called a chainring
• a drive chain
CAUTION: 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.
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 (g. 16) 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, nd
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
29


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