MY22Z0a - 12_1.0_25.07.2022
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Description
Bead core
Tyre carcasses are wrapped around bead cores.
Wrapping the carcass around both sides creates
three carcass plies.
To ensure that tyres do not slip when inflated on
the rim and have an effective grip, the bead cores
are stabilised in two different ways:
Figure 7: Steel bead core (1) and Kevlar bead core (2)
• with a steel wire. These tyres are called clinchers.
• With aramid fibres (Kevlar®). These tyres are
called folding tyres. Folding tyres are about 50-
90 g lighter than clinchers. It can also be folded
into a smaller pack size.
Puncture protection belt
There may be a puncture protection belt between
the carcass and the tread.
Figure 8: Effect of puncture protection belt
Each tyre manufacturer has its own puncture
protection classes which are not on par with one
another.
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