__________________________________________________ T_ ir_e_s_ a_n_d_ w_ h_e_ e_l_s_ ...... fflll
•
0 Not e
• For technical reasons, it is not genera lly possible to use the
wheel rims from other vehic les. 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 vehicle (for example winter tires or wide profile t ires), 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
vehic le as soon as possible.
• If you shou ld put different wheels and tires on your vehic le (e.g.
winter wheels and tires), you must be certain that the wheels and
tires are compatib le with the tire pressure monitoring system.
Otherwise the system will register a malfunction and a fau lt
message will be displayed . For more information, contact your Aud i
dea ler.
0 Note
• When insta lling new tires, be carefu l not to damage the valves or
t ire pressure monitoring system* senso rs.
• Never drive without the valve stem cap. The valves could get
damaged.
• If the sensors must be replaced, then the valve must also be
replaced at the same t ime.
<i' 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 A B C
Quality grades can be found where applicable on the tire side wall
bet ween tread shoulder and maximum section widt h =>
page 279,
fig. 211.
For example : Tread wear 200 , Traction AA, Temperature A.
All passenger car tires must conform to Federa l Safety Require-
ments in addition to these grades.
Tre ad w ea r
The tread wear grade is a comparative rating based on the wear rate
of the tire when tested under con t rol led conditions on a specified
government test course.
For exam ple, a tire graded 150 would wear one and o ne half (1 1/2)
times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual condi -
tions of the ir use, however, and may depart significantly from the
norm due to variations in driving habits, service practices and differ -
ences in road cha racteristics and climate .
Tra ction
The traction grades, from highest to lowest , are AA, A, Band C.
Those grades represent the tire's ability to stop on wet pavement as
measu red under contro lled conditions on specified government
test surfaces of asphalt and concrete. A tire marked C may have
poor traction performance =>
/.1.
Temperatur e
The temperature grades are A (the highest), B, and C, representing
the tire 's resistance to the generation of heat and its ability to dissi -
pate heat when tested under contro lled conditions on a specified
indoor laboratory test wheel.
Sustained high t emperature can cause the material of the ti re to
degenerate and reduce tire life, and excessive temperature can lead
to sudden tire failure =>
/.1.
The grade C corresponds to a level of performance which all
passenger car tires must meet under the Federal Motor Vehicle
Vehicle care
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