Audi Q7 2014 Owner's Manual page 289

- All four wheels must be fitted with radial
tires of the same type, size (rolling cir-
cumference) and the same tread pattern .
Driving with different tires reduces vehi-
cle handling and can lead to a loss of
control.
- If the spare tire is not the same as the
tires that are mounted on the vehicle -
for example with winter tires - only use
the spare tire for a short period of time
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
vehicles - 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
vehicles that were equipped with them
at the factory. The vehicle must have a
chassis designed for run flat tires. Incor-
rect use of run flat tires can lead to vehi-
cle 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 permit-
ted.
Tires and wheels 287
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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 tire 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.
- 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 284,
fig. 253 .
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 1S0 would wear
one and one half (1 1/2) times as well on the
government course as a tire graded 100.
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