29
WARNING: If you can fully close the cam lever without wrapping your
fingers around the seat post or a frame tube for leverage, and the lever does not
leave a clear imprint in the palm of your hand, the tension is insufficient. Open
the lever; turn the tension adjusting nut clockwise a quarter turn; then try again.
C. Brakes
There are three general types of bicycle brakes: rim brakes, which operate by squeezing the
wheel rim between two brake pads; disc brakes, which operate by squeezing a hub-mounted
disc between two brake pads; and internal hub brakes. All three can be operated by way of a
handlebar mounted lever. On some models of bicycle, the internal hub brake is operated by
pedaling backwards. This is called a Coaster Brake and is described in Appendix C.
WARNING:
1.
Riding with improperly adjusted brakes, worn brake pads, or wheels on
which the rim wear mark is visible is dangerous and can result in serious
injury or death.
2. Applying brakes too hard or too suddenly can lock up a wheel, which could
cause you to lose control and fall. Sudden or excessive application of the
front brake may pitch the rider over the handlebars, which may result in
serious injury or death.
3. Some bicycle brakes, such as disc brakes (fig. 10) and linear-pull brakes (fig.
11), are extremely powerful. Take extra care in becoming familiar with these
brakes and exercise particular care when using them.
4. Some bicycle brakes are equipped with a brake force modulator, a small,
cylindrical device through which the brake control cable runs and which
is designed to provide a more progressive application of braking force. A
modulator makes the initial brake lever force more gentle, progressively
increasing force until full force is achieved. If your bike is equipped with a
brake force modulator, take extra care in becoming familiar with its perfor-
mance characteristics.
5. Disc brakes can get extremely hot with extended use. Be careful not to
touch a disc brake until it has had plenty of time to cool.
6. See the brake manufacturer’s instructions for operation and care of your
brakes, and for when brake pads must be replaced. If you do not have the
manufacturer’s instructions, see your dealer or contact the brake manufac-
turer.
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