Glossary - SICE FIT LINE 32 Manual De Instrucciones

16. GLOSSARY

Tyre
A tyre consists of: I-the actual tyre, II- the rim (wheel),
III-the air chamber (in tube type tyres), IV-pressurised air.
The tyre must:
- withstand a load,
- ensure driving power,
- steer the vehicle,
- aid handling and braking,
- aid vehicle suspension.
I - Tyre The actual tyre is the main part of the overall
tyre in contact with the road and is therefore designed
to withstand internal air pressure and all other stress
arising from use.
A tyre section shows the various parts it consists of:
1 - The tread. This is the part in contact with the ground
when the tyre rolls. It comprises a rubber compound and
a "pattern" that is suitable for ensuring good resistance
to abrasion and good grip in dry and wet conditions, as
well as quiet operating conditions.
2 - Edge or bracing. This is a metal fabric or textile insert,
in the area of the outer bead part. It protects the casing
plys from rubbing against the rim.
3 - Casing. This is the resistant structure and comprises
one or more layers of rubber plys. The way the plys
comprising the casing are arranged give the structure
its name. The following structures are possible:
Conventional: the plys are inclined and arranged so that
the strands comprising a ply overlap with those of the
adjacent ply. The tread, which is the part of the tyre in
contact with the ground, is part of the sidewalls and so
during rolling, sidewall flexure is transmitted to the tread.
Radial: the casing consists of one or more plys with the
cords in a radial direction.
A radial casing in itself is quite unstable. To make it
stable and prevent bad tread movement in the area of
contact with the ground, the casing and the undertread
are reinforced with an annular structure, usually called
belt. The tread and sidewall work with different, inde-
User Manual FITLINE 32 - 32 2V - 32 GP - 32 GP 2V
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II
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IV
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