Glossary - SICE S 1000 Manual De Instrucciones

13. GLOSSARY

Tyre
A tyre consists of: I-tyre, II- rim (wheel), III-inner tube
(with 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 over-
all 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 plies from rubbing against the rim.
3 - Casing. This is the resistant structure and com-
prises one or more layers of rubber plies. The way
the plies comprising the casing are arranged give
the structure its name. The following structures are
possible:
Conventional: the plies 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 plies with
the cords in a radial direction.
User manual S 1000
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