Corghi A 2030 Manual De Uso página 130

2
7 - Protective band. This is a circumferential marking
in the area of the sidewall which is more exposed to
accidental rubbing.
10
8 - Sidewall. This is the area between the shoulder
and the centring band. It consists of a more or less
d
thin layer of rubber, which protects the casing plies
from lateral impact.
4
e
9 - Inner lining. This is a vulcanised, compound sheet,
a
impermeable to air, inside tubeless tyres.
b
c
10 - Filling. It is a rubber profile with a triangular
section, placed above the rim; it provides rigidity
for the bead and gradually offsets the abrupt uneven
thickness caused by the side ring.
11 - Flap. This is the part of the casing ply around the
side ring and placed against the casing, to secure the
ply and prevent it from slipping.
12 - Foot. This is the innermost layer of the tread in
contact with the belt, or if the latter is not present
(conventional tyres) with the last casing ply.
13 - Shoulder. This is the outer part of the tread,
between the corner and start of the sidewall.
14 - Bead. This is the part that joins the tyre to the rim.
The bead point (a) is the inner corner. The spur (b)
is the inner part of the bead. The base (c) is the area
resting against the rim. The groove (d) is the concave
part against which the rim shoulder rests.
Tube type tyres. As a tyre has to contain pressurised
air for a long period of time, an air chamber is used.
The valve for inserting, maintaining, controlling and
restoring pressurised air is, in this case, part of the
chamber.
Tubeless tyres. Tubeless tyres consist of a tyre with
inner sidewall lined with a thin layer of special
impermeable rubber, called a liner. This liner helps
to maintain air pressure in the casing. This type of
tyres must be mounted on specific rims, on which
the valve is fixed directly.
II - Rim (Wheel). The rim is the rigid metal part which
connects the vehicle hub to the tyre, on a fixed but
A 2030 - A 2025 - A 2022 - A 2018 - A 224 A - A 224 Operator's manual
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