SATA AE1031H Bedienungsanleitung Seite 169

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AE1031H
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
4.Side ring This is a metal ring with various steel wires. The casing plies are
secured to the side ring.
5.Belt. This is a non-flexible circumferential struc.ture comprising cross-plies
at very low angles, positioned below the tread, to stabilise the casing in the
footprint area.
6.Centring band. This is a small marking which indi.cates 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 plies
from lateral impact.
9.Liner Airtight vulcanised compound layer 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 The outermost part of the tread, located between the corner and
the beginning 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 impermeable 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 geomet.ric forms, which ensure: easy tyre mounting
(bead insertion 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
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