Canyon Mountain bike Manual page 31

58 BRAKE SYSTEM
BRAkES – HOW THEY WORk AND WHAT TO DO
ABOUT WEAR
Actuating the hand lever on the handlebar causes a
stationary brake pad to be pressed against a rotat-
ing braking surface, and the resulting friction slows
down the wheel. The rate of deceleration is not only
determined by the force with which the brake pad is
pressed against the braking surface, but also to a
decisive degree by the coefficient of friction, which
depends on the two materials that are rubbed against
each other.
When water, dirt or oil gets in contact with one of the
engaging surfaces, this changes the coefficient of
friction. This is why disc brakes respond at a slight
delay and less powerfully in wet weather. The friction
generated by braking causes wear to the brake pads
as well as to the rotors! Frequent rides in the rain has-
ten wear on both engaging surfaces.
Disc brake
Make sure that the rotors and brake pads
!
remain absolutely free of grease, lubricant
and wax. Brake pads, once contaminated with oil
cannot be cleaned, but have to be replaced!
Wet conditions and/or a heavily clogged
i
brake can lead to squeaking noises during
braking.
When replacing brake pads, be sure to only
i
use marked original spare parts matching
your brake.
Leakages in the lines of hydraulic brakes
may render them ineffective. Remove such
leakages immediately, otherwise risk of accident!
CHECKING AND
READJUSTING DISC
BRAKES
In the wet disc brakes respond much faster than rim
brakes. They also require fairly little maintenance
and do not wear down the rims as rim brakes do. One
drawback of disc brakes is that they tend to be noisy
when they are wet. With disc brakes the brake levers
can be adjusted to the size of your hands, too, allow-
ing you to operate them with optimal effectiveness. In
most cases this is done by means of a small Allen bolt
located directly at the hand lever.
FUNCTIONAL CHECk
Regularly check the lines and connections for leaks
while pulling on the lever. If hydraulic oil or brake flu-
id leaks out, you should take appropriate measures
immediately, as a leak can render your brakes inef-
fective. Contact, if necessary, our service hotline at
+44 (0) 20 8501 2582.
Check the pads for wear by inspecting the thickness
of the braking material attached to the backing plate
within the brake calliper or view through the win-
dow on the upper side of the calliper. If there is ap-
proximately 1mm of material left on each brake pad,
remove the pads according to the manufacturer's
operating instructions, check them thoroughly and
replace them, if necessary.
Manufacturers of disc brakes deliver their
i
products with detailed operating instruc-
tions. Be sure to read these operating instruc-
tions carefully before you dismount a wheel or do
any maintenance work.
When replacing any parts be sure to only
i
use original spare parts!
DISC BRAKES BRAKE SYSTEM 59
Disc brake
Adjusting the gripping distance of the brake lever
Worn down disc brake pads must be replaced
Dirty brake pads and rotors can lead to
drastically reduced braking power. There-
fore, make sure the brake remains free of oil and
other fluids, especially when you clean your bi-
cycle or grease the chain. Dirty brake pads can
under no circumstances be cleaned, they must be
replaced! Rotors can be cleaned with warm water
and mild soap. There are also special brake clean-
ers available.