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Tires and wheels
283
been driven for more than a
It is usually not possible to see
•
couple of miles (kilometers) at
whether the radial tires used
•
'
low speeds during the previous
today are underinflated just by
three hours . Air in the tires ex-
looking at them.
pands when the tire heats up as
Therefore, be sure to check tire
a result of internal friction as it
pressures at least once a month
flexes in use. The tire pressure
and always before going on a
is higher when the tire has
long trip. Make sure to take the
warmed up than when it is
number of people and the
"cold."
amount of luggage into ac-
It is the inflation pressure in a
count when adjusting tire pres-
"cold" tire that counts. There-
sure for a trip - even one that
fore, you should never let air
you would not consider to be
out of a warm tire to match
"long. " See ¢
page 286 , Tires
"Cold tire inflation pressure"
and vehicle load limits
for more
recommendations ¢
page 2 78.
important information.
The tires would then be under-
Always use an accurate tire
inflated and could fail sudden-
pressure gauge when checking
ly.
and adjusting inflation pres-
The tire pressure label on your
sures. Check all of the tires and
Audi lists the recommended
be sure not to forget the spare
cold tire inflation pressures at
tire . If the pressure in any tire is
maximum capacity for the new,
too high when the tire is "cold,"
original equipment tires that
let air out of the tire slowly
were on your vehicle at the time
with the edge of the tire gauge
it was manufactured. For the
and keep checking the pressure
location of the label
until you reach the pressure
¢
page 278, fig. 250.
that is correct for the load (pas-
Most tires lose air naturally
sengers and luggage) and kind
over time. They can also lose
of driving you plan to do .
....
M
N
some air if you drive over a pot-
0
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'SI:
hole or hit a curb while parking .
....
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1.1'1
....
1.1'1
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