2015 AUDI S8 wheel size

258 Tires and wheels
T up to 118 mph (190 km/h)
U up to 124 mph (200 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
1l
Z over 149 mph (240 km/h)ll
W up to 168 mph (270 km/h)ll
Y up to 186 mph (298 km/h)l)
Your veh icle is normally factory equipped with
tires, which possess excellent driving charac­
teristics and give your Audi opt imum driving
comfort. An electronic speed limiter
c:> page 30 will normally prevent your vehicle
from going faster than the tire speed rating
c:> & .
U.S . DOT Tire Identification Number (TIN)
and tire manufacture date
This is the tire's "serial number". It begins
with the letters "DOT" and indicates that the
tire meets all federal standards. The next two
numbers or letters indicate the plant where it
was manufactured, and the last four numbers
r epresent the week and year of manufacture.
F or example, the numbers 2214 mean the tire
was produced in the 22nd week of 2014. The
other numbers are marketing codes that may
or may not be used by the tire manufacturer .
T his information is used to contact consumers
if a tire defect requires a recall.
Audi original tire
Tires with the identification "AO" or "RO" have
been specially matched with your Audi . We
recommend using only these tires because
they meet the highest standards regarding
safety and driving characteristics when used
correctly . Your authorized Audi dealer will
gladly provide you with more information .
Tire ply composition and materials used
The number of plies indicates the number of
layers of rubber-coated fabric in the tire. In
general, the greater the number of plies, the more weight a tire can support. Tire manufac -
ll F t· "t h .
o r ires w 1 a m ax im um spee d ca pabil ity ove r 149
mph (2 40 km/ h), ti re manufact urers sometimes use
the lett ers " ZR."
turers also must indicate the materials in the
tire, which include steel, nylon, polyester, and
others .
Maximum Load Rating
Th is number ind icates the max imum load in
kilograms and pounds that can be carried by
the tire .
Tire quality grading for treadwear,
traction , and temperature resistance
Tread wear, traction and tempera ture grades
c:>page 259.
Maximum Permissible Inflation Pressure
This number is the greatest amount of a ir
pressure that should ever be put in the tire
un der normal driv ing conditions .
_& WARNING
= -
- Using incorrect or unmatched tires and/
or wheels or improper tire and wheel
combinations can lead to loss of control
collision and serious personal injury.
'
- Always use tires, rims and whee l bolts
that meet the specifications of original factory-installed tires or other combina­
tions that have been specifically ap­
proved by the vehicle manufacturer.
- 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 w ith special care and at lower
speeds.
- Never mount used tires on your veh icle if
you are not sure of the ir "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire fa ilure
and loss of vehicle control.
- All four whee ls must be fitted with radial
tires of the same type, size (rolling cir­ cumference) and the same tread pattern . ..,_

260 Tire s and wheel s
Traction
The traction grades, from highest to lowest,
are AA, A, Band
C. T hose grades represent the
tire's ability to stop on wet pavement as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete. A tire marked C may have poor
traction performance
c:> .&. .
Te mp eratu re
The temperature grades are A (the highest),
B, and
C, representing the t ire's resistance to
the generat ion of heat and its ability to dissi­
pate heat when tested under con trolled cond i­
tions on a specified i ndoor laboratory test
wheel.
Sustained high temperature can cause the material of the tire to degenerate and reduce
tire life, and excessive temperature can lead
to sudden tire failure
c:> ,& .
The grade C corresponds to a level of perform­
ance which all passenger car tires must meet under the Federa l Motor Veh icle Safety Stand­
ard No . 1 09 . Grades Band A represent h igher
l eve ls of pe rformance on the laboratory test
wheel than the m inimum required by law.
.&_ WARNING
T he traction grade assigned to this t ire is
based on stra ight-ahead braking traction
tests, and does not include acceleration,
cornering, hydrop laning o r peak traction
character istics.
A WARNING
The temperature grade for this t ire is es ­
tablished for a t ire that is properly inflated
and not ove rloaded. Excessive speed, un­
derinflation, or excessive loading, either
separately or in combination, can cause
heat buildup and possible ti re fa ilu re.
-
Winter tires
Winter tires can improve vehicle handling on
snow and ice . At temperatures below 45 °F
(7 °C) we recommend changing to winter
tires.
In some heavy snow areas, local governments
may require true w inter o r "snow" t ires , those
with very deeply cut tread . Th ese tires should
o n ly be used in pairs and be installed on a ll
f o ur wheels . Make sure you p urch ase snow
t ir es that are the same size and cons truction
type as the othe r tires on yo ur vehicle.
If your vehicle i s equ ipped w ith all-whee l
drive, this will improve tra ction during w inte r
driv ing, even with the standard tires . Howev ­
er, we strongly recommend that you always
equip all four wheels on your vehicle w ith cor­
rect ly fitted winter tires or all-season t ires,
when winter road condit ions are expected.
This also improves the veh icle 's brak ing per­
formance and reduces stopping d istances .
Summer tires provide less grip on ice and
snow.
Winter tires (snow tires) must always be fitted on all fo ur whee ls .
As k your au thori zed A udi dealer or qualified
workshop for permit ted
winter tire size s. Use
only radial winter tires .
Winter tires lose their effec tivenes s whe n the
tread is wo rn down to a depth o f 0 .1 57 inch
(4 mm) .
Only d rive w ith w inter t ires under w inte r co n­
di tions. S umme r tir es handle be tte r whe n
the re is no snow o r ice on the roa ds an d the
temperatu re is above 45 °F (7 °C) .
If you have a flat ti re, see notes on spare
whee l
c:> page 256.
Please a lways remember that winter tires may
have a lowe r speed rating than the tires o rigi­
nally i nstalled on your vehi cle at the time it
was manuf actu red. P lease see
c:> page 257,
Speed ra ting (Letter code) fo r a lis ting o f the
speed rating lette r codes and the max imum
speed at which the tires can be driven . ..,.

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
The speed rating letter code (c::> page 248) is
on the side wall of the tire
c::> page 256.
A WARNING
Winter tires have maximum speed limits
that may be lower than your vehicle's max­
imum speed . Always know the maximum
speed before driving off. Never drive faster
than the speed permitted for your specific
winter tires . This will cause damage to the
tires leading to an accident and serious
personal injury to you and your passen­
gers.
A WARNING
Driving faster than the maximum speed
for which the winter tires on your vehicle
were designed can cause tire failure in­ cluding a blowout and sudden deflation,
loss of control, crashes and serious per­
sonal injuries . Have worn or damaged tires
replaced immediately.
- Winter tires have maximum speed rating
that may be lower than your vehicle's
maximum speed .
- Never drive faster than the speed for
which the winter or other tires installed
on your vehicle are rated .
A WARNING
Always adjust your driving to the road and
traffic conditions. Never let the good ac­
celeration of the winter tires and all-wheel
drive tempt you into taking extra risks . Al­
ways remember :
- When braking, an all-wheel drive vehicle
handles in the same way as a front drive
vehicle.
- Drive carefully and reduce your speed on
icy and slippery roads, even winter tires
cannot help under black ice conditions.
@l For the sake of the environment
Use summer tires when weather condi­
tions permit. They are quieter, do not wear
as quickly and reduce fuel consumption.
-
Tires and wheels
Snow chains
Snow chains may be fitted only to the front
wheels , and only to certain tire sizes. Ask your
authorized Audi dealer on which tire sizes
snow chains can be used.
If you are going to use snow chains, then you
must install them on the front wheels at
least.
The snow chains must have low-profile links
and must not be thicker than 0.4 inch
(10,S mm) , including the lock.
Remove wheel center covers and trim discs
before putting snow chains on your vehicle
c::> (]) . For safety reasons cover caps must then
be fitted over the wheel bolts. These are avail­
able from authorized Audi dealers.
A WARNING ,..__
Using the wrong snow chains for your vehi­
cle or installing them incorrectly can in­
crease the risk of loss of control leading to
serious personal injury.
- Snow chains are available in different
sizes . Always make sure to follow the in­
structions provided by the snow chain manufacturer .
- When driving with snow chains never
drive faster than the speed permitted for
your specific snow chains .
- Always observe local regulations.
(D Note
- Remove snow chains before driving on
roads not covered with snow to avoid
damaging tires and wearing the snow
chains down unnecessarily.
- Snow chains, which come into direct con­
tact with the wheel rim, can scratch or
damage it. Therefore, make sure that the
snow chains are suitably covered . Check
the position of the snow chains after
driving a few yards and correct if neces­
sary. Follow the instructions from the
snow chain manufacturer when doing so.
- If the Adaptive Air Suspension should
malfunction, do not mount or use snow ..,.
261
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,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
or ridges on the road, particularly if the tire is underinflated .
I n o rder to m inim ize the occu rrence of impact
damage to the t ires of your veh icle, we recom ­
mend that you observe the following precau­
tions:
- Always maintain recommended inflat ion
pressures. Chec k your tire pressure every
2,000 miles (3,000
km) and add air if neces­
sary.
- Drive carefu lly on roads with potholes, deep
gullies or ridges. The impact from driving
through or over such obstacles can damage
your tires. Impact with a curb may a lso
cause damage to your tires.
- After any impact, immediately inspect your
tires or have them inspected by the nearest
authorized Aud i dealer. Replace a damaged
t ire as soon as possible .
- Inspect your t ires every 2,000 miles (3,000
km) for damage and wear. Damage is not al­
ways easy to see. Damage can lead to loss of
air and underinflation, wh ich could eventu­
ally cause tire failure. If you be lieve that a
t ir e may have been damaged, replace the
t ire as soon as possible.
- T hese tires may wea r mo re qui ck ly than ot h­
ers.
- Please a lso remember that, whi le these tires
deliver respons ive handling, they may ride
l ess comfortably and make mo re noise than
othe r choices.
Reduced performance in winter /cold
season condition s
All tires are des igned for certa in pu rposes.
The low aspect ratio, ultra high performance
tires originally installed on your veh icle are in­
tended for maximum dry and wet road per­
formance and handling. They are not suitable
for cold, snowy or icy weather condit ions.
If
you dr ive under those circumstances, you
should equip your veh icle with all-season or
winter t ires, which offer better traction under
those cond itions. We suggest you use the rec­
ommended snow or all-season tires specified
for your ve hicl e, or their equ iva lent.
Tire s an d wheel s 263
Refer to q page 260 for more detailed infor­
mation regard ing winter tires.
Tire pressure
monitoring system
ill General notes
Each tire, incl uding the spare ( if provided),
shou ld be checked monthly when co ld and in­
flated to the inflation pressure recommended by the veh icle manufacturer on the veh icle
placard or tire inf lation pressure label. (If your
vehicle has tires of a different size than the s ize indicated on the vehicle placard or tire in­
flat io n pressure labe l, you shou ld determ ine
t h e p rope r tir e inflation p ressu re fo r those
ti res).
As an added safety feature, your veh icle has
been equipped with a tire pressure mon itoring
system ( TPMS) that illum inates a low t ire
pressure te lltale whe n one or more o f you r
tires is significant ly under-inflated . According­
ly, when the low tire pressure te lltale illumi­
nates, you should stop and check your tires as
soon as possib le, and inflate them to the
proper pressure. Driving on a sign ificantly un­
der- inflated tire causes the tire to overheat
and can lead to tire fa ilure. Under-inflation al ­
so reduces fuel eff ic iency and tire tread life,
and may affect the vehicle 's hand ling and
stopp ing ability.
Please note that the TPMS is not a substitute
for proper tire ma intenance, and it is the driv­
er's respons ibility to maintain co rrect tire
pressure, even if under-inflation has not
reached the leve l to tr igger illuminat ion of the
T PMS low tire pressu re tellta le .
Your vehicle has also been equipped with a
T PMS ma lfu nction ind icator to ind icate when
the sys tem is not operating properly. The
T PMS ma lfunction indicator is combined with
the low tire pressure te lltale. When the sys ­
tem detects a malfunction, the telltale will
flash for approximate ly one minute and then ..,.
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