Bedienungsanleitung Marin Bikes (Seite 29 von 54) (Englisch)

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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

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Marin Bikes Seite 29

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