Audi A8 2008 Owner's Manual page 340

___ T _ir_ e_ s _ a_n _d _ w _ h _ e_ e _l_ s _______________________________________________ _
T ire ma nu fact uring d ate
The manufacturing date is also indicated on the t ire sidewa ll
(possib ly on ly on the inner side of the wheel):
"DOT ... 2207 ... " means, for example, the tire was produced in the
22nd week of 2007.
Sp e ed ratin g (le tt e r c ode )
The speed rating letter code on the whee ls indicates the maximum
permissible road speeds =>
&
in "Winter tires" on page 341.
P up to 93 mph (150 km/h)
Q up to 99 mph (158 km/h)
R up to 106 mph (170 km/h)
S upto110mph(180km/h)
T upto118mph(190km/ h)
U up to 124 mph (200 km/h)
H
up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
2
>
Z over 149 m ph (240 km/h)
2
>
W up to 168 mph (270 km/h)
21
Y up to 186 mph (298 km/ h)
21
Your vehicle is normally factory equipped with tires, which possess
excel lent driving characteristics and give your Audi opt imum
driving comfort . An electronic speed limiter=> page 28wil l norma lly
prevent your vehicle from going faster t han the tire speed rating
=>& .
U .S . D OT T ire Iden t ifi c ation Number (TIN ) and tire
m a nuf ac tur e d a t e
This is the tire's "seria l num b er" . It beg ins with t he letters "DOT"
and indicates that the tire meets all federal standards . The next two
numbers or letters indicate the plant where it was manufactured,
and the last four numbers represent the week and year of manufac-
21
For tires with a maximum speed capab ility over 149 mph (240 km/h), ti re
manufacturers somet imes use the lett ers "ZR."
ture . For example, the numbers 2207 mean the tire was produced in
t he 22nd week of 2007 . The other numbers are marketing codes that
may or may not be used by the tire manufacturer . This information
is used to contact consumers if a tire defect requires a recall.
T ire p ly co m pos it ion a n d m a t e ria ls u sed
The number of plies indicates the number of layers of rubber -coated
fabric in the tire . In genera l, the greater the number of p lies, the
more weight a tire can support. Tire manufacturers also must ind i-
cate the materials in the tire, which include steel, ny lon, polyester,
and others.
M ax imum Lo a d Ra ting
This number indicates the maximum load in kilograms and pounds
that can be carried by the tire.
Tire quali t y grading f o r treadwe a r, t rac tion , and
t e mp e ra tu re resis t a n ce
Tread wea r, traction and temperature grades => page 340.
M ax imum Pe rmi ss ibl e Infl a tio n Pr ess u re
This number is the greatest amount of air pressure that should ever
be put in the tire under norma l driving conditions.
Repl ac in g tir es o r rim s on v ehi c les e quipp e d w ith t ire
pr e s s ur e monit o rin g s y st e m
The wheels on your vehicle are equipped with a sensor which
constantly monitors the air pressure inside the tire , and then trans -
m its this information to the tire pressure mon itoring system. If you
are going to replace the whee l rims on your vehicle, make sure the
n ew rims also have t hese sensors. The sensors mus t be compa ti ble
with the tire pressure monitoring system on your vehicle .
If you instal l rims, which do not have the sensors, or have sensors
whic h are not compatible, then the t ire pressure monitoring system
wi ll not work properly. In this case, the tire pressure monitoring
system would not be ab le to mon itor the tire pressure or warn you
if it is necessary . .,_