Corghi A 222 Manuel D'utilisation page 113

sidewall flexure is not transmitted to the tread.
4 - Side ring. This is a metal ring comprising several
steel strands. The casing plys are secured to the
side ring.
5 - Belt. This is a non-flexible circumferential struc-
ture comprising cross-plys at very low angles, po-
sitioned below the tread, to stabilise the casing in
the footprint area.
6 - Centring band. This is a small marking which
indicates the circumference of the top part of the
bead and is used as a reference to check exact tyre
centring on the rim after mounting.
7 - Protective band. This is a circumferential marking
in the area of the sidewall which is more exposed
to accidental rubbing.
8 - Sidewall. This is the area between the shoulder
and the centring band. It consists of a more or less
thin layer of rubber, which protects the casing plys
from lateral impact.
9 - Liner. This is a vulcanised, compound sheet,
impermeable to air, inside tubeless tyres.
10 - Filling. This is a generally triangular rubber profile,
above the side ring; 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 tyre) with the last casing ply.
13 - Shoulder. This is the outer part of the tread, be-
tween the corner and start of the sidewall.
14 - Bead. This is the part joining the tyre to the rim.
The bead point (a) is the inner corner. The spur (b)
is the outer 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.
Operator's manual A 222
9
3
7
14
2
d
e
b
c
5
11
6
10
4
a
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