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17
GEARS - HOW TO OPERATE
Derailleur Gears
Most multi-speed bicycles today are equipped with what are known
as derailleur gears. They operate using a system of levers and mecha-
nisms to move the drive chain between different sized driving gears
or cogs. The purpose of gears is to let you maintain a constant, steady
pedaling pace under varying conditions. This means your riding will
be less
tiring without unnecessary straining up hills or fast pedaling down
hill. Bicycles come with a variety of gear configurations from 5 to 27
speeds. A 5-6 speed bicycle will have a single front chainwheel, a
rear derailleur, and 5 or 6 cogs on the rear hub. Bicycles with more
gears will also have a front derailleur, a front chainwheel with
2-3 cogs, and up to 9 cogs on the rear hub.
Operating Principles
No matter how many gears, the operating principles are the same.
The front derailleur is operated by the left shift lever and the rear
derailleur by the right. To operate you must be pedaling forward. You
can not shift derailleur gears when you are stopped or when pedaling
backwards. Before shifting ease up on your pedaling pressure. For
a smooth gear change when approaching a hill, shift to a lower gear
BEFORE your pedaling speed slows down too much. When coming
to a stop, shift to a lower gear first so it will be easier when you start
riding again. If, after selecting a new gear position, you hear a slight
rubbing noise from the front or rear gears, gently adjust the appropriate
shifter using the barrel adjusters until the noise goes away. For opti-
mal performance and extended chain life, it is recommended that you
avoid using the extreme combinations of gear positions (diagram p.
18) for extended periods.
Drivetrain
Front Derailleur
Guide Pulley
Rear Derailleur
Front Chainwheels
Crank Arm
Pedal
Derailleur Control
Cable
Freewheel
Cogs