Audi TT 2010 Owner's Manual page 235

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Tire manufacturing date
The manufacturing date is also indicated on the tire sidewall
(possibly on ly on the
inner
side of the wheel):
"DOT ... 2209 ... " means, for example, that the tire was produced in
the 22nd week of 2009.
Speed rating (letter code)
The speed rat ing letter code on the wheels ind icates the maximum
permissible road speeds =>
&
in "Winter tires" on page 236.
P up to 93 mph (150 km/h)
Q
up to 99 mph (158 km/h)
R up to 106 mph (1 70 km/h)
S
up to 110 mph (180 km/h)
T up to 118 mp h (190 km/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)
4
>
Z over 149 mph (240 km/h)
4 >
W up to 168 mph (270 km/h)
4
>
Y up to 186 mph (298 km/h)
4 >
Your vehicle is normally factory equipped with t ires, which possess
excellent driving characterist ics and give you r Audi optimum driv ing
comfort. An electronic speed
Li
miter=> page 20 will normally prevent
your vehicle from going faster than the tire speed rating =>
&-
U.S. DOT Tire Identification Number (TIN) and tire
manufacture date
This is the tire's "serial number" . It begins with the letters "DOT" and
indicates that the ti re meet s all federal st andards. The next two
numbers or letters indicate the plant where it was manufactured, and
the last four numbers represent the week and year of manufacture .
For example, the numbers 2209 mean that the tire was produced in
4 l
For tires w ith a maxim um speed capabili ty over 149 mph (240 km/h), t ire
manufacture rs sometimes use t he letters "ZR."
Safety first
the 22nd week of 2009 . 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.
Audi Original tire
Tires with the identification "AO" or "RO" have been specially
matched w it h your Audi. We recommend using only t hese tires
because they meet the highest standards regard ing safety and
driv ing characteristics when used correct ly. Your authorized Audi
dealer will gladly provide you with more information .
Tire ply composition and materials used
The number of plies indicates the number of layers of rubber-coated
fabric in the tire. In general, the greater the number of plies, the
more weight a tire can support . Tire manufacturers also must indi-
cate the materials in the tire, which include steel, nylon, polyester,
and others .
Maximum Load Rating
This number indicates the maximum load in kilograms and pounds
that can be carried by the tire.
Tire quality grading for treadwear, traction, and
temperature resistance
Tread wear, traction and temperature grades=> page 235.
Maximum Permissible Inflation Pressure
This number is the greatest amount of air pressure that should ever
be put in the tire under normal driving conditions.
Replacing tires or rims on vehicles equipped with
tire pressure monitoring system
The wheels on your vehicle are equipped with a sensor which
constantly monitors the air pressure inside the tire, and then trans-
mits this information to the tire pressure monitoring system . If you
are going to replace the wheel rims on your vehicle, make sure the
new rims also have these sensors. The sensors must be compatible
with the tire pressure monitoring system on your vehicle.
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Vehicle care Technical data