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Page 23
General Instruction Manual
worn tyre:
◊
When the tread is worn so thin that there
are frequent punctures from small pieces of
debris, or so the inner fabric shows through
the tread, for example see figure 19.
◊
When the tyre's fabric has been damaged,
so that the tyre
has a lumpy, ir-
regular
appear-
ance somewhere,
or so that the in-
ner tube bulges
t h r o u g h
t h e
tread, for exam-
ple see figure 20.
Note that the tyre size is shown on
the tyre sidewalls (for an example,
see figure 21). This information is
important when purchasing correct
replacements.
Some special high-performance tyres have unidirectional treads: their tread pattern
is designed to work better in one direction than in the other. The sidewall marking
of a unidirectional tyre will have an arrow showing the correct rotation direction. (for
an example, see figure 22). If your
bike has unidirectional tyres, be
sure that they are mounted to
rotate in the correct direction.
CAUTION: Consult the tyre / inner tube manufacturer’s
instructions or your Whyte dealer as to how to replace those
items. If you do not have the manufacturer’s instructions,
contact your Whyte dealer or the manufacturer (see the sup-
plementary service manual for contact details).
Tyre Valves
The bicycle pump you use must have the fitting appropriate to
the valve stems on your bicycle. There are two
kinds of bicycle tube valves:
◊
The Schraeder Valve (figure 23) is like the
valve on a car tyre. To inflate a Schraeder valve
tube, remove the valve cap and clamp the pump
fitting onto the end of the valve stem. To let air
out of a Schraeder valve, depress the small pin in
the end of the valve stem.
◊
The Presta valve (figure 24) is only found on
bicycle tyres. Inflate using a Presta headed
Fig. 19
Fig. 20
57 – 559 (26 X 2.125)
Fig. 21
ROTATING DIRECTION
Fig. 22
Fig. 23
Fig. 24
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