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234
Tires
and wheels
Occupant loading and distribution for vehicle normal load for various designated seating
capacities
Designated seating capacity,
Vehicle normal load, number
Occupant distribution in a nor-
number of occupants
of occupants
mally loaded vehicle
5
3
2 in fron t , 1 in back seat
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle.
Fig . 189 Tire press ure label : located on driver's side B·
pillar
Tire pressure genera lly refers to the amount
of air in a t ire 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 measur ing unit and in pounds per
square inch (PSI). Tire pressure is based in
part on t he 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 freq uently referred to as the
"recommended cold tire inf lation pressure."
Air in the tires expands when the tire heats up
because of internal frict ion when it flexes in
use. The t ire pressure is higher when the tire
has wa rmed up tha n when it is "cold ." It is the
inflat ion pressure in a "cold" tire that counts.
Therefore, you shou ld never let air out of a
warm tire t o match " cold ti re infl at ion pres-
sure" recommendations . The t ires wo uld then
be underinflated and could fail suddenly .
Maint aining proper t ire pressure is one of the
most im port ant th ings you can do t o help
avoid sudden t ire f ailure. Underin f lat ed t ires
are a maj or 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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Fig. 190
Tire pressure labe l
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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 numbe r of passengers and/o r amount
of luggage you w ill be t ransporti ng.
The tire pressure label is located on the driv-
er's side B-pillar . The tire pressure label lists
the recommended cold t ire inflat ion pressures
for the vehicle at its maximum capacity
weight and t ires t hat were on your veh icle at
t he time it was manufa ct ured.
If you wish to improve comfort wh en operat-
ing the vehicle at normal load (up to 3 occu-
pant s), you can adj ust tire pressures to tho se
specified f or normal vehicle load . Before op-
erating the vehicle at maximum load, you
mu st increase the ti re pressures to those
specified for maximum vehicle load
~
,&..
Bear in min d t hat t he tire pressure mon itor ing
system * can only mo nitor the t ire pressures
.,.
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