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Tires
and wheels
193
Occupant loading and distribution for vehicle normal load for various designated seating
capacities
Designated seating capacity,
Vehicle normal load,
Normally loaded vehicle,
occupant distribution
number of occupants
number of occupants
2
2
2 in front
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle.
Fig. 149
Tire pressure labe l: located on driver's s ide B·
pillar
Tire pressure genera lly 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 kilopasca ls (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 t ire size. The prop-
er tire pressure is frequent ly 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
inflat ion pressure in a "cold" tire that counts.
Therefo re, you should never let air out of a
warm tire to match "cold tir e inflat ion pres-
sure" recommendations. The tires wo uld then
be underinflated and could fail suddenly.
Maintaining proper t ire pressure is one of the
most impor tant things you can do to help
avoid sudden t ire failure. Underinflated tires
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,
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a
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a
PSI
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Fig. 150 Tire pressu re labe l
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.
The recommended tire pressures for your Audi
depend on the kind of tires on your vehicle
and the number of passengers and/o r amount
of luggage you will be transporti ng.
The tire pressure label is located on the driv-
er's side B-pillar . The tire pressure label lists
the recommended cold tire inflat ion pressures
for the vehicle at it s maximum capacity
weight and tires that were on your veh icle at
t he time it was manufactured.
If you wish to improve comfort when operat-
ing the vehicle at normal load (up to 2 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 t ire pressure monitoring
system can only monitor the tire pressures
II>
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