Corghi ARTIGLIO 500 Manuel D'utilisation page 79

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Operator's manual Artiglio 500
Radial. The carcass consists of one or more
plies with the cords arranged in a radial
direction.
A radial carcass in the purest sense is
relatively unstable; to make it stable and
prevent stray movements of the tread in the
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footprint, on the carcass and underneath the
tread an annular reinforcing structure gener-
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ally known as a belt is used. The tread and
the sidewall work with different rigidities
and independently, so as the wheel turns
flexural movements of the sidewall are not
transmitted to the tread.
4 - Loop. This is a loop of metal consisting of sev-
eral steel wires. The carcass plies are anchored
to the loop.
5 - Belt. This is a non-extensible circumferential
structure consisting of plies criss-crossed at very
narrow angles, located underneath the tread, in or-
der to stabilise the carcass in the footprint area.
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6 - Centring ridge. This is a small ridge running around
the circumference of the top of the bead groove,
which serves as reference to ensure that the tyre
is centred exactly on the rim after mounting.
7 - Guard ridge. This is a ridge running around the
circumference of the part of the sidewall most at
risk of accidental rubbing.
8 - Sidewall. This is the zone between the shoulder
and the centring ridge. It consists of a layer of rub-
ber of varying thickness, intended to protect the
carcass plies against knocks from the side.
9 - Liner. This is a sheet of airtight rubber blend,
vulcanised onto the inside of tubeless tyres.
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10 - Filling. A rubber profile, generally triangular in
cross-section, above the loop; it ensures the rigidity
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of the bead and provides a gradual compensation
of the sudden change in thickness caused by the
loop.
GB
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