2018 AUDI A8 wheel size

LL
"' .... N ,-.. N .... g :r st
use a spare tire* that is the same
circumference as the regular
tires.
&_ WARNING
-Only use tire/rim combina­ tions and suitable wheel bolts
that have been approved by
Audi. Otherwise, damage to
the vehicle and an accident
could result.
-For technical reasons, it is not
possible to use tires from oth­
er vehicles
-in some cases,
you cannot even use tires from
the same vehicle model.
-Make sure that the tires you
select have enough clearance
to the vehicle. Replacement
tires should not be chosen
simply based on the nominal
size, because tires with a dif­
ferent construction can differ greatly even if they are the
same size. If there is not
enough clearance, the tires or
the vehicle can be damaged and this can reduce driving
safety and increase the risk of
an accident.
-Only use tires that are more
than six years old when abso-
Wheels
lutely necessary and drive
carefully when doing so .
-Do not use run-flat tires on
your vehicle. Using them when
not permitted can lead to ve­
hicle damage or accidents.
-If you install wheel covers on
the vehicle, make sure they al­ low enough air circulation to
cool the brake system. If they
do not, this could increase the
risk of an accident.
Tire wear/damage
Fig. 265 T ir e profile: treadwear indica­
tor
Tire wear
Check the tires regularly for wear.
-Inflation pressure that is too low
or high can increase tire wear
considerably.
-Driving quickly through curves, rapid acceleration and heavy
braking increase tire wear.
291

tires according to the load and
the size of the tires installed.
Wheels
Tire pressure
Model/ Tire designation Normal load Maximum load
Engine (up to
2*/3 people)al
front
rear front rear
PSI kPA PSI kPA PSI kPA PSI kPA
A8/A8 L: 235/55 Rl8 104H
35 24
0
30 210
36 250
38 260
3.0L
255/45 Rl9 104H 35 240
30 210 36 250 38 260
6 cylinders 265/40 R20 104H 35 24
0
30 21
0
36 2
50
38 26
0
265/40 R20 104V 35 240
30 210 33 230 35 240
265/35 R21 101 Y 38 260
35 240
36 250
38 2
60
275/35 R21103Y 35 240
30 210 36 250 35 240
A8/A8 L: 235/55 Rl8 104H 36 250 30 210 38 260 38 2 60
4.0L
255/45 Rl9 104H 36 250 30 210 38 260 38 260
8 cylinders 265/40 R20 104H 36 250 30 210 38 260 38 260
265/40 R20 104V 36 250 30 210 35 2
40
35 2
40
275/35 R21 103V 36 250 30 210 38 260 38 260
58: 265/40 R20 104V 36 25 0 30 210 3 9 27
0
38 260
4.0L
265/35 R21101 Y 39 270 33 230 44 300 42 290
8 cylinders 275/35 R21 103V 36 250 30 210 44
300 42
290
58 plus: 265/40 R20 104V 38 260 32 220 39 270 38 260
4.0L
275/35 R21 103V
8
cylinders 45 310 39 270 49 340 48 330
a ) Vehicles with 4 seating positions: two people in the front, Vehicles with 5 seating
positions:
two people in the front, one person in the rear
A WARNING
Please note the important safe­
ty precautions regarding tire pressure
c:::> page 293 and load
limits
c:::> page 295.
Tires and vehicle load limits
There are limits to the amount of
~ load or weight that any vehicle that
is overloaded will not handle
well and is more difficult to stop.
Overloading can not only lead to
loss of vehicle control, but can al­
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout
and sudden deflation that can
cause the vehicle to crash.
N
~ and any tire can carry. A vehicle
0 0 :c ' Your safety and that of your pas­
sengers also depends on making
..,
295

Wheels
under controlled conditions on a specified
government test course.
For example, a tire graded 150 would wear one
and one ha lf (11/2) times as well on the govern­
ment course as a tire graded 100 .
The relative performance of tires depends upon
the actual conditions of their use, howeve r, and
may depart significant ly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate .
Traction
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 measured un­
der contro lled conditions on specified govern­
ment test surfaces of aspha lt and concrete. A tire
marked C may have poor traction performance
¢ & .
Temperature
The temperatu re grades are A (t he highest), B ,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the mate ­
rial of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden
tire
fa ilure¢ fr:. .
The grade C corresponds to a leve l of perform ­
ance which a ll passenger car tires must meet un­
der the Federa l Motor Vehicle Safety Standard
No. 109. Grades B and A represent higher leve ls
of performance on the laboratory test wheel than
the mi nimum required by law.
A WARNING
-
The traction grade assigned to this tire is
based on straight-ahead braking traction
t ests, and does not include acceleration, cor­
nering, hydroplaning or peak traction charac­
teristics.
300
A WARNING
The temperature grade for t his tire is estab­
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla­
tion, or excessive loading, either separately or
in comb ination , can cause heat buildup and
possible tire failure.
A WARNING
-
-
Temperature grades apply to tires that are
properly inflated and not over or under inflat­
ed .
Tire Pressure Monitoring
System
(AS, S8)
ill General notes
Applies to: AS, 58
Each tire, including the spare (if prov ided),
shou ld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure labe l.
(If your veh icle has
tires of a different size than the size ind icated on
the ve hicle placard or tire inflat ion pressure la­
bel , you should determ ine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure mon itor ing system
(TPMS) that illum inates a low tire pressure tell­
tale when o ne or more of your tires is significant­
l y unde r-inflated. According ly, when the low tire
pressure telltale illum inates, you sho uld stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi ­
cant ly under -inflated tire causes the tire to over­
heat and can lead to tire fai lure. Under-inflation
also reduces fue l eff iciency and tire tread life,
and may affect the vehicle's handling and stop­ ping ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the dr iver's re ­
spons ibility to maintain correct t ire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres-
sure te lltale .
.,.

Wheels
-The driver is responsible for maintaining the
correct tire pressure. You must check the
tire pressure regularly.
- Under certain conditions (such as a sporty
driving style, winter conditions or unpaved
roads), the tire pressure monitoring system
indicator may be delayed .
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents .
(D Tips
- The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function .
- Using snow chains may result in a system
malfunction.
- The tires with the identification
"AO" or
"RO" ¢ page 290 have been matched with
your Audi tire pressure monitoring system.
Using these tires is recommended.
Storing tire pressures
Applies to: AB, S8
If the tire pressure changes or a tire is replaced,
it must be confirmed in the Infotainment sys­
tem .
.,. Make sure before storing that the tire pressures
of all four tir es meet the specified values and
are adapted to the
load ¢ page 291 .
.,. Switch the ignition on .
.,. Select : the ICARI function button > Car Systems
control button > Service & control > Tire pres­
sure monitor> Store tire pressure > Yes, store
now.
(D Tips
Do not store the tire pressures if snow chains
are installed. Otherwise the system could
malfunction.
302
Tire Pressure Monitoring System (SB plus)
ill General notes
Applies to: S8 plus
Each tire, including the spare (if provided),
shou ld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size ind icated on
the veh icle placard or tire inflat ion pressure la­
bel, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure mon itor ing system
(TPMS) t hat illuminates a low tire pressure tell­
ta le when o ne or more of your tires is significant­
l y under-inflated. According ly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi ­
cant ly under-inflated tire causes the tire to over­
heat and can lead to tire failure . Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop ­
ping ability .
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re­
spons ibility to maintain correct t ire pressure,
even if under-inflation has not reached the level
to trigge r illumination of the TPM S low t ire pres­
su re te lltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to ind icate when the sys­
tem is not operating prope rly . The TPM S mal­
function indicator is combined with the low t ire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one minute and then remain continuously
illuminated. This sequence wi ll continue upon
subsequent vehicle start-ups as long as the mal­
function exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS
malfunctions ..,_