9�5 Brakes
Brake surfaces and brake pads are wear parts, which means they need to be inspected regularly
(see Section 10 on page 51). The brakes must always be checked or serviced by a specialist if:
the brake pads are
worn down to the indicator (see graphic)
the brake lever touches the
handlebar when braking.
the brakes squeak or vibrate.
9�6 Cranks
The cranks can loosen. Therefore, check for tight fit of cranks regularly or have a specialist do it.
Have damaged cranks repaired or replaced by
a specialist if necessary.
9�7 Bottom bracket
Bottom brackets can wear out after a certain time.
Have damaged bottom brackets repaired or replaced by a
specialist if necessary.
9�8 Spokes and wheels
Spokes connect the hubs to the rims. They must be sufficiently tensioned and influence the
concentricity of the wheel. Check the spokes regularly for damage and sufficiently high spoke
tension or have them checked by a specialist.
Have damaged spokes repaired or replaced
by a specialist if necessary.
If a wheel exhibits excessive lateral or radial runout,
have it repaired or centred by a specialist.
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