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Presta valve
The Presta valve, also known as the Sclaverand
valve or the French valve, is the narrowest variant
of all valves. The Presta valve requires a smaller
hole in the rim, which is why it is especially
suitable for the narrow rims on racing bikes. It is
about 4 to 5 g lighter than a Dunlop or Schrader
valve.
Figure 30: Presta valve
Schrader valve
The Schrader valve can be pumped at filling
stations. Older, simple bicycle air pumps are
unsuitable for Schrader valves.
Figure 31: Schrader valve
3.5.4.5 Spoke
A spoke is a rod that connects the hub to the rim.
The bent end of the spoke which is hooked into
the hub is called the spoke head. A thread
between 10 mm and 15 mm is attached to the
other end of the spoke.
MY23I0a - 42_1.0_22.01.2024
3.5.4.6 Spoke nipples
Spoke nipples are screw elements with an internal
thread which fits onto the spoke thread. Fitted
spokes are tensioned by tightening the spoke
nipples. This straightens the wheel uniformly.
Description
63
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