Glossary - Corghi Artiglio Master 26” MI Manual De Uso

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GLOSSARY

Tyre
The tyre is a combination of the following items: I-
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tyre, II-rim (wheel), III-inner tube (in tube-type tyres),
IV-pressurised air .
The tyre must:
- support the load,
- ensure the transmission of the drive forces,
- steer the vehicle,
- contribute to roadholding and braking,
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- contribute to the vehicle's suspension.
I - Tyre. The tyre is the main element of the wheel-
tyre combination which is in contact with the road
and is therefore required to withstand the internal
air pressure and all the other stresses generated
by use.
A cross-section view of the tyre shows all its consti-
tuent parts:
1 - Tread. It is so-called because it comes into contact
with the ground as the wheel turns. It consists of a
rubber blend and of a "pattern" designed to ensure
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both good resistance to abrasion and a good grip
on the ground in wet and dry conditions, as well as
low running noise.
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2 - Edge or reinforcement. A woven metal or fabric insert
on the outside of the bead; it protects the carcass
plies from rubbing against the rim.
3 - Carcass. It provides the main resistant body of the
tyre and consists of one or more layers of rubber-
coated fabric, or plies. The way in which the plies
which make up the carcass are arranged gives the
name to the tyre's structure. There are the following
different structural types:
Bias ply: the plies are laid at angles and arranged
so that the strands in one ply form a criss-cross
pattern with those of the next ply. The tread, which
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is the part of the tyre touching the ground, is in a
single piece with the sidewalls and so as the wheel
turns any flexural movements of the sidewall are
transmitted to the tread.
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 mo-
Artiglio Master operator's manual