MY22Z0a - 12_1.0_25.07.2022
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Description
3.3.2 Wheel
Figure 4: Visible wheel components
1Tyres
2 Rim
3 Spoke
4 Spoke nipples
5Hub
6Valve
The wheel comprises a tyre, an inner tube with a
valve and the wheel itself.
3.3.2.1 Tyres
The tyre forms the outer section of the wheel. The
tyre is pulled onto the rim. Tyres differ in design,
profile and width, depending on their intended
use.
Figure 5: Example: Information on tyres
Tyre size
The tyre size pressure range is indicated on the
side of the tyre.
Tyre pressure
The permitted pressure range is indicated on the
side of the tyre. It is indicated in psi or bars. The
tyre is only able to support the pedelec if there is
adequate tyre pressure. The tyre pressure must
be adjusted to the body weight and then checked
on a regular basis.
Tyre design types
There are five different tyre design types:
• Tube-type tyres,
• Tubeless tyres (also tubeless ready)
• Tubular or single tube tyres
• Solid tyres
• Mixed types.
3.3.2.2 Tube-type tyre
A distinction is made between different kinds of
tube-type tyre:
• Clinchers with steel wire reinforcement in bead
core
• Folding tyres with aramid fibre reinforcement in
bead core
• Beaded edge tyres without reinforcement in
the bead core but with pronounced beads that
hook under the rim edge and overlap in the rim
well.
Figure 6: Structure of tube-type tyre
1 Rim (see Section 3.3.4.2)
2 Carcass
3 Puncture protection belt (optional)
4 Tread with profile
5 Bead core
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