Bedienungsanleitung Cervelo Multi-speed racing bicycles (Seite 23 von 40) (Englisch)

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Cervélo Owner’s Manual

There are several different types and styles of shifting controls:

levers, twist grips, triggers, combination shift/brake controls and

push-buttons. Ask your dealer to explain the type of shifting controls

that are on your bike, and to show you how they work.

The vocabulary of shifting can be pretty confusing. A downshift

is a shift to a “lower” or “slower” gear, one which is easier to pedal.

An upshift is a shift to a “higher” or “faster”, harder to pedal gear.

What’s confusing is that what’s happening at the front derailleur is

the opposite of what’s happening at the rear derailleur (for details,

read the instructions on Shifting the Rear Derailleur and Shifting

the Front Derailleur below). For example, you can select a gear

which will make pedaling easier on a hill (make a downshift) in one

of two ways: shift the chain down the gear “steps” to a smaller gear

at the front, or up the gear “steps” to a larger gear at the rear. So,

at the rear gear cluster, what is called a downshift looks like an

upshift. The way to keep things straight is to remember that shifting

the chain in towards the centerline of the bike is for accelerating and

climbing and is called a downshift. Moving the chain out or away

from the centerline of the bike is for speed and is called an upshift.

Whether upshifting or downshifting, the bicycle derailleur system

design requires that the drive chain be moving forward and be under at

least some tension. A derailleur will shift only if you are pedaling forward.

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).

fig. 10

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Cervelo Multi-speed racing bicycles Seite 23

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