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and tires. A wheel must a lso be rebalanced
when a new tire is installed.
Incorrect wheel alignment
Inco rrect whee l alignment can cause exces-
sive t ire wea r, impair ing t he safety of the vehi-
cle. If tires show excess ive wear, have the
wheel alignment checked by an authorized
Audi dealer or qualified workshop.
All-wheel drive
Only the wheel/tire sizes specified by the
manufacturer may be used on vehicles wit h
all-wheel drive. For details see <:!) page 149.
A
WARNING
Sudden tire failure can lead to loss of con-
tro l, a crash and serious persona l injury!
- Never drive a veh icle when the tread on
any t ire is worn down to the wear indica-
tors.
- Worn tires are a safety hazard , they do
not grip well on wet roads and increase
your risk of"hydrop lan ing" and loss of
control.
- Always keep chemicals that can cause
t ire damage, such as grease, oil, gasoline
and brake fl uid away from t ires.
- Tires age even if they are not being used
and can fail suddenly, especially at high
speeds. Tires that are more than 6 years
old can only be used in an emergency
and then with special care and at lower
speeds.
- Never mount used tires on yo ur vehicle if
you are not sure of their "previous histo-
ry." Old used tires may have been dam-
aged even t hough the damage cannot be
seen that can lead t o sudden t ire failure
and loss of vehicle control.
Tires and wheels
199
New tires and replacing tires and wheels
New tires and wheels hove to be broken in .
Fig. 152
Tire spec ificat ion codes on t he sidewall of a
tire
No. Description
CD
Passenger car tire (where applicable)
@
Nomina l width of t ire in mill imeters
®
Ratio of height to width (aspect ratio)
©
Rad ia l
®
Rim diameter code
®
Load index and speed rating
(f)
U.S. DOT tire identification number
®
Aud i Origina l ti re
®
Sever snow conditions
@
Tire ply composi t ion and mater ials used
@
Maximum load rating
@
Treadwear, tracti on and temperature
grades
@
Maximum permissible inflation pres-
sure
The tires and rims are essentia l parts of the
vehicle 's design . The t ires and rims app roved
by Audi are spec ially matched to the charac-
teristics of the vehicle and can ma ke a major
contr ibut ion to good road holding and safe
.,.
•
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