58 I General User Manual
27.3 Tyres
Due to their nction, bike tyres are subject to wear. This
depends on how the bike is used and the rider can inu-
ence this signicantly.
Do not brake so sharply that the wheels lock.
Check the tyre pressure regularly. The maximum
permissible tyre pressure, and normally also the
minimum permissible pressure, can be found on
the tyre wall.
If necessary, inate the tyre up to the specied
value. This reduces wear.
Do not expose the tyres to things that can damage
them such as sunlight, petrol, oil, etc.
27.4 Rims in conjunction with rim brakes
Owing to the interaction of the rim brake with the rim, not
only the brake pad but also the rim is subject to nction-
related wear. If ne cracks appear or the rim anges
deform when the tyre pressure increases, this indicates
increased wear. Wear indicators on the rim allow its wear
condition to be easily identied.
Check the wear condition of the rim at regular in-
tervals (see
Chapter 16.3 "Checking the rims").
27.5 Brake pads
The brake pads on rim, roller, drum and disc brakes are
subject to wear, the extent of which depends on how the
bike is used. If the bike is ridden in hilly regions, or used
in a sporty manner, the brake pads may need to be re-
placed more oen. Check the wear condition of the pads
regularly and, if necessary, have them replaced by a pro-
fessional bike workshop.
27.6 Brake discs
Brake discs also wear out as a result of intensive braking,
or during the course of time. Find out om the manufac-
turer of your brakes or your specialist cycle shop about
the respective wear limits. You can have worn brake discs
replaced at a professional bike workshop.
27.7 Bike chains or toothed belts
The bike chain is subject to nction-related wear the ex-
tent of which depends on care/maintenance and how the
bike is used (mileage, rain, dirt, salt, etc.).
To increase the service life of the bike, clean the
bike chains and toothed belts regularly and lubri-
cate the chain.
Have the chain replaced by a professional bike
workshop once its wear limit has been reached
(see
Chapter 20 "Bike chain").
27.8 Chainrings, sprocket wheels and
jockey wheels
In bikes with derailleur gears, the sprocket wheels, chain-
rings and jockey wheels are subject to nction-related
wear. The extent of the wear depends on care/mainte-
nance and how the bike is used (mileage, rain, dirt, salt,
etc.).
To increase the service life of the bike, you should
clean and lubricate these parts regularly.
Have them replaced by a professional bike work-
shop once their wear limit has been reached.
27.9 Lamps of lighting set
Bulbs and other lamps are subject to nction-related wear
and therefore may need to be replaced.
In case you need to replace damaged bulbs, always
carry spare ones with you.
