216 Tires and wheels
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle.
Fig. 167 Tire pressure labe l: located either on driver's
side 8-pillar or inside the fuel filler flap
Tire pressure generally refers to the amount
of air in a tire that it needs it to do its job and
safely carry the combined load of the entire
vehicle and its contents . Tire pressure is
measured in kilopascals (kPa), the interna-
tional measuring unit and in pounds per
square inch (PSI). Tire pressure is based in
part on the vehicle's design and load limit-
the greatest amount of weight that the vehi-
cle can carry safely and the tire size. The prop-
er tire pressure is frequently referred to as the
"recommended cold tire inflation pressure."
Air in the tires expands when the tire heats up
because of internal friction when it flexes in
use. The tire pressure is higher when the tire
has warmed up than when it is "cold ." It is the
inflation pressure in a "cold" tire that counts.
Therefore, you should never let air out of a
warm tire to match "cold tire inflat ion pres-
sure" recommendations. The tires would then
be underinflated and could fail suddenly .
Maintaining proper tire pressure is one of the
most important things you can do to help
avoid sudden tire failure. Underinflated ti res
are a major cause of sudden tire failure. Keep-
ing tires at the right pressure is also impor-
tant for safe and responsive vehicle handling,
traction, braking and load carrying .
Tire pres-
sures are particularly important when the
vehicle is being driven at higher speeds, and
then especially when heavily loaded even
within the permissible load-carrying capaci-
ties approved for your vehicle.
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- KPA. a PSI
- KPA.
a PSI
- KPA. a PSI
Fig. 168 Tire pressure labe l
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The recommended tire pressures for your Audi
depend on the kind of tires on your vehicle
and the number of passengers and/or amount
of luggage you will be transporting .
On USA vehicles, the t ire pressure label is lo-
cated on driver's side B-pillar . On Canada vehi-
cles, the tire pressure label is located either
on the driver's side B-pillar or inside the fuel
filler flap . The tire pressure label lists the rec-
ommended cold tire inflation pressures fo r
the vehicle at its maximum capacity weight
and tires that were on your vehicle at the time
it was manufactured.
If you wish to improve comfort when operat-
ing the vehicle at normal load (up to 3 occu-
pants), you can adjust tire pressures to those
specified for normal vehicle load. Before op-
erating the vehicle at maximum load, you
must increase the tire pressures to those
specified for maximum vehicle load ¢ .&..
Bear in mind that the tire pressure mon itoring
system* can only monitor the tire pressures
you have stored. The system does not recog-
nize the load condition of your vehicle.
The effectiveness of the tire pressure monitor-
ing system* wi ll be impaired if you store nor-
mal load pressures but then operate the vehi-
cle at its maximum load
¢ .&..
See the illustration ¢ fig. 167 for the location
of the label either on driver's side B-pill ar or
inside the fuel fi ller flap (color of the actual
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