Wheels and tyres
8-17
Maintenance and care
Wheels and tyres glossary
Accessory weight
The combined weight (in excess of those
items replaced) of items available as
factory installed equipment.
Bead
The inner edge of a tyre that is shaped to
fit to the rim and form an air tight seal. The
bead is constructed of steel wires which
are wrapped, or reinforced, by the ply
cords.
Cold tyre pressure
The air pressure in a tyre which has been
standing in excess of three hours, or driven
for less than one mile.
Gross vehicle weight
The maximum permissible weight of a
vehicle with driver, passengers, load,
luggage, and equipment.
Kerb weight
The weight of a standard vehicle, including
any optional equipment fitted, and with
the correct fluid levels.
kPa (kilo pascal)
Metric unit of measure for pressure. One
kilo Pascal equals approximately .145 PSI.
Maximum inflation pressure
The maximum pressure to which the tyre
should be inflated. This pressure is given
on the tyre side wall in lbf/in
2
and kPa.
Note:
This pressure is the maximum
allowed by the tyre manufacturer. It is not
the pressure recommended for use. See
Tyre pressures, page 10-6.
Maximum loaded vehicle weight
The sum of curb weight, accessory weight,
vehicle capacity weight, and production
options weight.
Production options weight
The combined weight of options installed
which weigh in excess of 1.4 kg (3 lb) more
than the standard items that they
replaced, and are not already considered
in kerb or accessory weights.
PSI (lbf/in
2
)
Pounds per square inch. Imperial unit of
measure for pressure.
Rim
The metal support for a tyre, or tyre and
tube, upon which the tyre beads are
seated.
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