Corghi ARTIGLIO 50 Manual De Uso página 156

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.
Tube type tyres. As a tyre has to contain pressurised
air for a fairly long time, an air chamber is used. The
valve for adding air and maintaining, controlling and
restoring air pressure is part of the chamber in this case.
Tubeless tyres. Tubeless tyres consist of a tyre with
inner sidewall lined with a thin layer of special im-
permeable rubber, called liner. This liner helps to
maintain air pressure in the casing. This kind of tyre
must be mounted on a specific rim, to which the valve
is directly fixed.
II - Rim (Wheel). The wheel is the rigid metal part
which connects the vehicle hub to the tyre, on a fixed
but non-permanent basis.
Rim profile. The rim profile is the form of the section in
contact with the tyre. It comprises different geometric
forms, which ensure: easy tyre mounting (bead inser-
tion in the rim well); safe driving, in terms of the bead
anchored in its seat.
The rim section shows its various parts: a) rim width
– b) shoulder height – c) tubeless anchoring (HUMP)
– d) valve hole – e) ventilation opening – f) off set – g)
central hole diameter – h) attachment hole centre to
centre i) keying diameter – j) rim well.
III - Air chamber (tube type tyres). The air chamber is
a closed ring-like rubber structure with valve, which
contains pressurised air.
Valve. The valve is a mechanical device to inflate/
deflate the tyre and maintain air pressure inside the
air chamber (or tyre in the case of tubeless tyres). It
consists of three parts: the valve closing cap (a) (to
protect the internal mechanism from dust and guar-
antee air tightness), an internal mechanism (b) and
the base (c) (the outer lining).
Tubeless Inflator. Inflation system that makes the
inflation of tubeless tyres easier.
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a
c
b
d
e
g h
f
j
a
b
Artiglio 50/55 User Manual
i
c