traction control AUDI A7 2017 Owner´s Manual

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use the recommended snow or all-season tires
specified for your vehicle, or their equivalent.
Refer to
~ page 22 7 for more deta iled i nfo rma­
tion rega rding win ter tires.
Uniform t ire quality grading
- Tread wear
- T raction AA A B C
- T emperatu re ABC
Quality grades ca n be found where applicable on
the ti re side wall between tread shoulder and
maximum sect ion w idth
¢ page 211, fig. 190.
For example: Tread wear 200, Traction AA, Tem­
perature A.
All passenger car tires must conform to Federal
Safety Requirements in addition to these grades.
Tread wea r
The
tr ead w ear grade is a comparat ive rating
based on the wear rate of the t ire when tested
under controlled conditions on a specified gov­
ernment test course.
F or examp le, a t ire graded 150 would wear one
and one ha lf
( 1 1/2) times as well on the govern ­
ment course as a tire graded
100 .
The relative perfo rmance of tires depends u po n
the actua l conditions of their use, however, and
may depart significant ly from the norm due to
va riations i n driving habits, service practices and
d ifferences in road characteristics and climate.
Traction
The
traction grades, from highest to lowest, are
AA, A, Band
C. T hose grades represent the tire's
ab ility to stop on wet pavement as measured un­
de r contro lled conditions on specified gove rn­
ment test surfaces of asphalt and concrete . A tire
marked C may have poor traction performance
¢ _& .
Temperatur e
The
temperature grades are A (the highest), B ,
and C, representing the tire's resistanc e to the
generation of heat and its ability to diss ipate
Wh eel s
heat when tested under cont rolled conditions on
a specified indoor laboratory test wheel.
Sustained high temperat ure can cause the mate­
r ia l of the tire to degenerate and reduce t ire life ,
and excessive tempera ture can lead to s udden
tire failure ¢,& .
T he grade
C corresponds to a level of perfo rm­
ance which all passenger car tires must meet un­
der the Federal Motor Vehicle Sa fety Standa rd
No.
109. Grades Band A represent higher levels
of pe rformance on the laboratory test wheel than
the minim um req uired by law.
A WARNING
-
The tract ion grade assigned to this t ire is
based o n straight -ahead braking traction
tests, and does no t include acceleration, co r­
n ering, hyd roplaning or pea k traction cha rac­
t erist ic s .
A WARNING
The temperature grade fo r this tire is estab­
lished for a tire that is properly infl,;1ted and
not overloaded . Excessive speed, underinfl a­
tion, o r excessive loading, either separately or
i n comb inat ion, can cause heat bu ildup and
possib le tire fai lure .
A WARNING
-
-Temperature grades apply to tires that are
p roperly inf lated and not ove r or under inflat­
ed.
Tire pressure monitoring system
(l) General notes
Each tire, including the spare (if provided),
shou ld be checked monthly when cold and inflat­
ed to the inflat io n pressure recommended by the
vehicle manufacture r on the veh icle placard or
t ir e infla tion p ressure labe l. (If your ve hicle has
t ir es of a diffe re nt si ze t han t he si ze ind icated on
t h e ve hicl e p lacard or tire inflat io n pres sure la­
bel, you sho uld dete rm ine the proper tire in fla-
t ion press ure for those tires) . ..,.
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