Audi TT Coupe 2009 Owner's Manual page 257

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Tir
es a
nd wh
ee ls
-
----------------
possible with a torque wrench
-
preferably by an authori zed Audi
dea ler or qua lified workshop.
Low
aspect
ratio
tires
Your Audi is factory-equipped with low aspect ratio tires. These t ires
have been thorough ly tested and been selected specifically for your
model for their superb performance
,
road feel and hand ling under
a variety of driving conditions
.
Ask your authorized Audi dealer for
more deta ils.
The low aspect rat io of these t ires is indicated by a numera
l
of
55 or
less in the tire's si ze designation. The numeral represents the ratio
of the tire's sidewa ll height in relation to its tread wid
t
h expressed
in perc entage. Conventiona
l
tires have a height/width ratio of 60 or
more
.
The perform ance of
low-
aspect -ratio tire
s is
parti cularly sensiti ve to
improp er inflation
pressure.
It
is
ther efore important that low
aspect ratio tir
es
are inflat ed to the specified pressure and th at the
inflation pressure is regularl
y
checked and mainta
ined.
Tire
pres-
sures
should be checked at least once
a
month and
alw ays
before a
long tr ip
:::;,
page 243, "Checking tire pressure".
What
y
ou
ca
n d
o t
o
av
oid tire
a
nd rim d
am
age
Low aspect ratio tires can be damaged more easi ly by impact with
potholes, curbs, gul
li
es or ridges on the road, particularly
if
the t ire
is underinflated.
In order to min imize the occurrence of impact damage to the tires
of your vehicle
,
we recommend that you observe the following
precautions:
A lways maintain recommended inflat ion pressures
.
Check your
tire pressure every 2,000 miles (3,000 km) and add air if necessary.
Drive carefully on roads with potholes
,
deep gullies or ridges.
The impact from driving through or over such obstacles can
damage your t ires. Impact with a curb may also cause damage to
your tires
.
After any impact
,
immediately inspect your tires or have them
inspected by the neares
t
authorized Audi dea
ler.
Replace a
damaged tire as soon as possib le.
Inspec
t
you
r
tires every 2,000 miles (3,000 km) for damage and
wear
.
Damage is not always easy to see. Damage can lead to loss of
air and underin
fl
ation, which cou ld eventua lly cause tire fai lure. If
you be lieve that a tire may have been damaged
,
replace the tire as
soon as possible
.
These tires may wear more quickly than others.
Please also remember
t
hat, while these tires de liver responsive
handling, they may ride less comfortably and make more noise than
other choices.
R
e
du
ce
d p
e
rform
a
n
ce
in w int
e r/c
old sea
s
on
c
ondition
s
A ll tires are designed for certain purposes
.
The low aspect ratio,
ultra h igh performance tires origina lly instal led o
n
your vehic le are
intended for maximum dry and wet road performance and hand ling.
They are
not
sui
t
able for cold, snowy
o
r icy weather conditions
.
If
you drive under those circumstances
,
you should equip your vehic le
with al l-season or winte
r
ti res, which offer better tract ion under
those conditions
.
We suggest you use the recommended snow or
all -season tires specified for your vehicle, or their equiva lent.
Refer to
:::;,
page 252
f
or more
det
ai led information
regarding winter
tires.
Tire pressure
monitoring
system
Ap plies to
v
ehi
cles:
with tire pressu re mon itori ng system
General
notes
....J
Each t ire, including the spare (if p rovided), should be checked
month ly when co ld and inflated to the inflation pressure recom-
mended by the vehicle manufacturer on the vehicle placa rd or tire
inf
lat
ion pressure label. (If your vehicle has tires of a different size
_,.
Vehicle care
I
t

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