Corghi ARTIGLIO 50 Manual De Uso página 155

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, independent rigidities, so during rolling,
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 structure
comprising cross-plys at very low angles, positioned
below the tread, to stabilise the casing in the foot-
print 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, im-
permeable 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, between
Artiglio 50/55 User Manual
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