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194
T i re s and w heel s
contribution to good road holding and saf e
handling when in good condition and properly
inflated
¢
,& .
We recommend that all work on tires and
wheels be perfo rmed by an authorized Audi
dealer. They are familiar with recommended
proced ures and have the necessary special
too ls and spare parts as well as the proper fa-
cilities for disposing of the old tires.
Authorized Audi dealers have the necessary
information about techn ical requ irements for
installing or changing tires and rims.
Replacing t ires and w heels
Tires should be rep laced at least in pairs and
not individua lly (for examp le both front tires
or both rear tires together).
Be sure to read and heed the information to
the tire pressure monitoring system
¢page 195.
Always buy rep lacement radial tires that have
the same specifications as the ti res approved
for your vehicle by Audi. Replacement t ires
must always have the same load rating speci-
fication as the original equipment or approved
optional tires listed in the table ¢ page 187.
Audi-approved specification ti res are specially
matched to your vehicle and its load limits,
and can contribute to the important road hold-
ing, driving characteristics, and safety of the
vehicle. The table (¢page 187) lists specifica-
tions of the t ires approved for the Audi mod-
els covered by your Owner's Literature .
The tire pressure label located on driver's side
B-pillar ( ¢ page 187, fig. 149) lists the speci-
f ications of the orig inal equipment tires in-
stalled on your veh icle at the time it was man-
ufactured.
Federal law requires t ire manufacturers to
place standard ized information on the side-
wall of all tires ¢ fig. 151 . This information
ident ifies and describes the fundamental
characterist ics, the quality grade of the tire
and also provides a tire ident ificat ion number
f or saf ety standard certification and in case of
a recall.
Tire specifications
Knowledge of ti re specificat ions makes it eas-
ier to choose the correct tires. Radial ti res
have the tire specifications marked on the
sidewa ll , for examp le:
P23 5 / 35 R 18 91 Y
This conta ins the following information:
P
Indicates the t ire is for passenger cars
2 35
Nom inal tire width in mm of the tire
from sidewall edge to sidewall edge. In
general, the larger the number, the wider
the tire
35
Height/width ratio in percent (aspect ra-
t io)
R
Tire construction : Radial
18
Rim diameter code (in inches)
91
Load rating code
Y
Speed rating letter code
XL (or "xl", "EXTRA LOAD", or "RF") ind icates
that the t ire is a"Reinforced" or an "Extra
Load" t ire
M+S (or "M/S") Indicates that the tire has
some mud and snow capability
The t ires could also have the information of
direction of rotat ion ¢ page 183.
Tire manufa ctur ing date
The manufacturing date is also indicated on
the tire sidewall (possibly on ly on the inner
side of the wheel):
" DOT ... 2211. .. " means, for examp le, that
the tire was produced in the 22nd week of
2011.
Speed rating (lette r code)
The speed rating letter code on the whee ls in-
dicates the maximum permissible road speeds
¢ .&. in Winter tires on page 198.
P
up to 93 mp h (150 km/h)
Q
up to 99 mph (158 km/h)
R
up to 106 mph (170 km/h)
S
up to 110 mph (180 km/h)
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