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Tires and wheels
2 79
Tire pressure generally refers to
tant things you can do to help
•
the amount of air in a tire that
avoid sudden tire failure. Un-
•
'
it needs it to do its job and
derinflated tires are a major
safely carry the combined load
cause of sudden tire failure.
of the entire vehicle and its con-
Keeping tires at the right pres-
tents. Tire pressure is measured
sure is also important for safe
in kilopascals (kPa), the inter-
and responsive vehicle han-
national measuring unit and in
dling, traction, braking and
pounds per square inch (PSI).
load carrying.
Tire pressures
Tire pressure is based in part on
are particularly important
the vehicle's design and load
when the vehicle is being driv-
limit - the greatest amount of
en at higher speeds, and then
weight that the vehicle can car-
especially when heavily loaded
ry safely and the tire size. The
even within the permissible
proper tire pressure is frequent-
load-carrying capacities ap-
ly referred to as the "recom-
proved for your vehicle.
mended cold tire inflation pres-
The recommended tire pres-
sure." Air in the tires expands
sures for your Audi depend on
when the tire heats up because
the kind of tires on your vehicle
of internal friction when it flex-
and the number of passengers
es in use. The tire pressure is
and/or amount of luggage you
higher when the tire has
will be transporting.
warmed up than when it is
The tire pressure label is locat-
"cold." It is the inflation pres-
ed on the driver's side B-pillar.
sure in a "cold" tire that counts.
Therefore, you should never let
The tire pressure label lists the
recommended cold tire infla-
air out of a warm tire to match
"cold tire inflation pressure"
tion pressures for the vehicle at
its maximum capacity weight
recommendations. The tires
would then be underinflated
and tires that were on your ve-
and could fail suddenly.
hicle at the time it was manu-
factured.
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Maintaining proper tire pres-
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sure is one of the most impor-
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