Gary Fisher 2004 gary fisher bicycles 用户手册
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CHAPTER ONE
Guide to Safe On-and-Off Road Operation
can be pulled to the handlebar, the brake is too loose. The brake
pads should be 0.25 to 0.75 mm away from the disc when the
brakes are not applied. If the pads are too close, the brake is too
tight, or mis-aligned.
Hard braking causes the disc, and the brake caliper, to
get hot. After braking, do not touch the disc for at least 30
minutes. As with other rotating parts on a bicycle, avoid
placing your fingers in the disc.
Internal drum or roller brakes
Internal drum or roller brakes are actuated by a brake lever
which is connected to the hub by a cable. If it takes more than
about 5/8 inch (15mm) of brake lever movement to stop the
bike, the brake is too loose. If it takes less than 15mm of lever
movement to stop the bike, the brakes are too tight. Hard
braking causes the hub shell to get hot. After braking, do not
touch the hub shell for at least 30 minutes.
Coaster brakes.
Instead of operating by hand, coaster brakes are actuated
with the legs by pedalling the crankarms
backwards. The chain transmits the motion of
the crankarms to the rear hub, where the brakes
operate internally. To check the brakes, pedal
backwards to make sure the brake engages with
less than 60 degrees rotation (1/6 revolution).
The chain actuates the brake, so make sure
the chain cannot come off. When grasped in the
middle of the chain run between the front and
rear sprockets, there should be between 1/4 and
1/2 inches (6-12 mm) total vertical movement
(Figure 1.5). If the chain tension is incorrect,
refer to the
Drivetrain
section of Chapter 3, or
take the bicycle to your Fisher dealer for service.
CAUTION
Internal hub brakes get very hot during use and could burn
skin. Avoid touching the hub or cooling fins when hot.
Figure 1.5 Checking chain
tension
tension
CAUTION
Disc brakes and discs get very hot during use and could burn
skin. Also, the disc edges may be sharp and could cut skin.
Avoid touching the disc or disc brake when hot, or when rotating.