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31
HOW THEY WORK, AND HOW THEY
GET WORN OUT
By using a brake lever or reverse pedaling a
fixed pad is pressed onto a rotating braking
surface and causes friction. This friction
causes the rotating wheel to slow. In addi-
tion to the force with which the pad presses
against the surface, the so called friction
coecient between the fixed pad and the
braking surface is crucial. If water, dirt or oil
gets onto the braking surface, the friction
coecient is worsened. This is the reason
why a rim or disc brake does not respond as
well in the rain.
WEAR AT RIM BRAKES
The friction between the brake pads and the
rim leads to the wearing of both the pad and
the rim! Riding often in the rain increases the
wear. If the rim sidewall is abraded to a criti-
cal level, the tyre pressure will cause the rim
to burst. The wheel can jam or the tube may
burst, both of which can lead to an accident.
By the time you have worn through your
second set of brake pads, it is time to visit
your dealer to check the thickness of your
rims’ sidewalls. For rims with a wear indica-
tor A, the rim must be replaced when the
indicator is no longer visible.
Moisture decreases the braking
effectiveness. When riding in rainy
conditions expect longer braking
distances! When replacing brake
pads, you should only use pads
that have been specied for your
system. Your dealer can advise you
in the matter. The braking surface
of rims should be absolutely wax,
grease and oil free.
Damaged brake cables in which
individual wires protrude must
be replaced immediately. Brake
failure and an accident can result.
Ask your dealer for advice.
DANGER!
A
ATTENTION!
By the time you have worn through
your second set of brake pads, it is
time to have your dealer check the
thickness of your rims’ sidewalls.
Worn-out rims malead to accidents.
ATTENTION!
33


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