Bosch ZEMO SU-E FS 12 Translation Of Original Operating Instructions page 164

7.5.1.2 Checking the tyres
The tread is far less important for bicycle tyres
than it is for car tyres, for example. Consequently,
tyres can still be used with a worn tread with the
exception of tyres on mountain bikes.
1 Check the tread for wear. The tyre is worn if the
anti-puncture protection or the carcass cords
are visible.
Since resistance to punctures also depends on
the thickness of the tread, it may make sense
to change the tyre at an earlier stage.
Figure 167: Tyre without tread which can be replaced (1)
and tyre with puncture protection showing through (2),
which must be replaced
MY22Z01 - 12_1.0_25.07.2022
Cleaning, servicing and inspection
2 Check the side walls for wear. If there are any
cracks or tears, the tyre must be replaced.
1
Figure 168: Examples of fatigue cracks (1) and ageing
cracks (2)
 Replacing a wheel requires considerable
mechanical expertise. If a tyre is worn, it needs
to be replaced at a specialist dealer's.
2
1
2
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