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D. SHIFTING
Your multi-speed bicycle will have a derailleur drivetrain (see 2. below),
an internal gear hub drivetrain (see 3. below) or, in some special cases,
a combination of the two.
1. Why all those gears?
You will get the greatest fitness benefit, produce the greatest sustained
power and have the greatest endurance if you learn to spin the pedals at
high revolutions per minute (called cadence) against low resistance. You
will get the least fitness benefit and have the least endurance by push-
ing hard on the pedals against heavy resistance. The purpose of having
multiple gears on a bicycle is to let you chose the gear that allows you
to maintain your optimum cadence under the widest range of riding con-
ditions. Depending on your fitness level and experience (the more fit,
the higher the
cadence
), optimum cadence is between 60 and 90
pedal revolutions per minute.
2000 owner's manual 10/27/99 10/27/99 11:16 AM Page 52