Audi R8 Spyder 2015 Owner's Manual page 190

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Ti res and wheels
table( ¢ page
176)
lists specifica-
tions of the tires approved for the
Audi models covered by your
Owner's Literature.
The tire pressure label located on
driver's side 8-pillar (¢page
176,
fig.
148)
lists the specifications of
the original equipment tires in-
stalled on your vehicle at the time
it was manufactured.
Federal law requires tire manufac-
turers to place standardized infor-
mation on the sidewall of all tires
¢ fig . 150 . This information iden-
tifies and describes the funda-
mental characteristics, the quality
grade of the tire and also provides
a tire identification number for
safety standard certification and
in case of a recall.
Tire specifications
Knowledge of tire spec ifications
makes it easier to choose the cor-
rect tires. Radial tires have the
tire specifications marked on the
sidewall, for example:
P235 / 35 R 19 91 Y
This contains t he following infor-
mation:
P
Indicates the tire is for passen-
ger cars
1 88
235 Nominal tire width in mm of
the tire from sidewall edge to
sidewall edge . In general, the
larger the numbe r, the wide r
the tire
35 Height/width ratio in percent
(aspect ratio)
R
Tire construction: Radial
19 Rim diameter code (in inches)
91 Load rating code
Y
Speed rating letter code
XL
(or "xl", "EXTRA LOAD", or
"RF") indicates that the tire is
a"Reinforced" or an "Extra
Load" ti re
M+S
(or "M/S") Indicates that t he
tire has some mud and snow
capability
The tires could also have the in-
formation of direction of rotation
¢page 170.
Tire manufacturing date
The manufactur ing date is also in-
dicated on the tire sidewa ll (pos-
sibly only on the inner side of t he
wheel) :
"DOT ... 2213 ... "means, for ex-
ample, that the tire was produced
in the 22nd week of 2013.
.,.

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