226 Tires and wheels
and drive with extra care. Refit the nor-
mal road wheel as soon as safely possi-
ble.
- Never drive faster than the maximum
speed for which the tires on your vehicle
are rated because tires that are driven
faster than their rated speed can fail
suddenly.
- Overloading tires cause heat build-up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- Temperature grades apply to tires that
are properly inflated and not over or un-
derinflated .
- For technical reasons it is not always
possible to use wheels from other vehi-
cles - in some cases not even wheels
from the same vehicle model.
- If you install wheel trim discs on the ve-
hicle wheels , make sure that the air flow
to the brakes is not blocked. Reduced air-
flow to the brakes can them to overheat,
increasing stopping distances and caus-
ing
a collision.
- Run flat tires may only be used on vehi-
cles that were equipped with them at the
factory. The vehicle must have a chassis
designed for run flat tires and a factory-
installed tire pressure monitoring sys-
tem* that indicates a loss of tire pres-
sure . Incorrect use of run flat tires can
lead to vehicle damage or accidents .
Check with an authorized Audi dealer or
tire specialist to see if your vehicle can be
equipped with run flat tires . If run flat
tires are used, they must be installed on
all four wheels. Mixing tire types is not
permitted .
(D Note
- For technical reasons, it is not generally
possible to use the wheel rims from oth-
er vehicles. This can hold true for wheels
of the same vehicle type.
- If the spare ti re is different from the
tires that you have mounted on your ve-
hicle (for example winter tires or wide
profile tires), then use the spare tire for a
short period of time only and drive with
extra care. Replace the flat tire with the
tire matching the others on your vehicle
as soon as possible.
- If you put different wheels and tires on
your vehicle (e.g. winter wheels and
tires), you must be certain that the
wheels and tires are compatible with the
tire pressure monitoring system* . Other -
wise the system will register a malfunc-
tion and a fault message will be dis-
played. For more information, contact
your authorized Audi dealer.
- Never drive without the valve stem cap .
The valves could get damaged .
@ For the sake of the environment
Dispose of old tires in accordance with the
local requirements.
Uniform tire quality grading
- Tread wear
- Traction AA A B C
- Temperature ABC
Quality grades can be found where applicable
on the tire side wall between tread shoulder
and maximum section width
¢ page 223,
fig. 171 .
For example: Tread wear 200, Traction AA,
Temperature A.
All passenger car tires must conform to Feder-
al Safety Requirements in addition to these
grades .
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
government test course.
For example, a tire graded 150 would wear
one and one half (11/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
ll-
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