tire pressure AUDI S8 2015 User Guide

250 Tires and wheels
Bear in mind that the tire pressure monitoring
system* can only monitor the tire pressures
you have stored . The system does not recog­
nize the load condit ion of your vehicle.
The effectiveness of the tire pressure monitor ­
ing system* will be impaired if you store nor­
mal load pressures but then operate the vehi ­
cle at its max imum load
c:> &. .
See the illustration c:> fig. 208 for the location
of the label on driver's side B-pillar (color of
the act ua l label and exact location on the ve­
hicle will vary slightly). Note
that the following table is accurate at
the time of going to press and is subject to
change. In the event of d iscrepancies, the t ire
pressure label is located on the driver's side B­
pillar always takes precedence.
The table below lists the recommended cold
t ir e inflation pressures for the Audi mode l
covered by your Owner's Literature at the vehi­
cle's capacity weight and the t ire sizes instal­
led on the respective models as orig inal
equipment, or as a factory opt ion.
Tire pressure
Model/En- Tire designation normal load condition full load condition
gine fronta> reara>
front rear
PSI kPA
PSI kPA PSI kPA PSI kPA
A8/A8 L: 235/55 R18 104H
35 240 32 220 36 250 38 260
3.0 liter
255/45 R19 104H 35 240 32 220 36 250 38 260
6-cylinder
265/40 R20 104H 35 240 32 220 36 250 38 260
265/40 R20 104V 33 230 32 220 33 230 35 240
275/35 R21103Y XL 35 240 32 220 36 250 35 240
A8/A8 L: 235/55 R18 104H 35 240
32 220 38 260 38 260
4.0 liter
255/45 R19 104H 35 240 32 220 38 260 38 260
8-cylinder
265/40 R20 104H 35 240
32 220
38 260
38 260
265/40 R20 104V 33 230 32 220
35 240 35 240
275/35 R21103Y
XL 35 240
32 220
38 260
38 260
ASL
: 265/40 R20 104V 35 240 32 220 36 250 35 240
6.3 liter
255/45 R19 104H 36 250 32 220
39 270
38 260
12-cylin-
265/40 R20 104H 36 250 32 220 39 270 38 260
der
275/35 R21103Y XL
35 240 32 220 36 250
35 240
58: 265/40 R20 104V 36 250 32 220
39 270 38 260
4.0 liter
265/35 R21101 Y 39 270 35 240 44 300 42 290
8-cylinder
275/35 R21103Y XL 39 270
35 240
44
300 42
290
XL= reinforced or extra load tire. It may also appear as xl, EXTRA LOAD, or RF on the tire side-
wall.
al n orma l lo ad co ndi tio n~ page 249.
The correct tire pressure for the spare wheel is
locat ed on a label on the driver's side B-pillar.
Because technical changes may be made to
ve hicl e equipment during the model year, al­
ways compa re the tire size designation on the tire
pressu re lab el on your vehicle wi th the
tires on your vehicle. Make sure that the tire
s iz e inform ation on the vehicle label is the
same as the size of the tires on the vehicle.
This is espec ially important if the vehicle be-
l ongs to someone e lse or yo u bought the ..,.

.... N .... N
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'SI: .... \!) er,
.... er, ......
vehicle with different rims/tires or you bought
the vehicle as a previously owned vehicle.
Remembe r, your safety and that of yo ur pas­
sengers also depends on mak ing s ure that
l oad limits are not exceeded . Vehicle load in­
cludes everybody and everything in and on the
veh icle. These load limits are technically refer­
red to as the vehicle's Gross Vehicle Weight
Rating ("GVWR"). The Gross Axle Weight Rat­
ing (''GAWR") is the maximum load that can
be appl ied at each of the veh icle's two axles .
The Gross Vehicle Weight Rating and the
Gross Axle We igh t Rating a re listed on the
safety compliance s ticker labe l located on the
d river's side 8-p illa r. T he tire pressure label on
your Audi lists the maximum combined weight of all of the occupants and luggage or
other cargo that the vehicle can carry. For the
locat ion of the tire pressure label¢
fig. 208.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a cras h or other accident, se­
rious personal inju ry, and even death .
-Carry ing more weight than your vehicle
was designed to carry will prevent the
vehicle from handling p roperly and in­
cr ease the ris k of a loss of veh icle con­
t ro l.
- T he bra kes on a veh icle that has been
overloaded may no t be able to stop t he
vehicle within a sa fe distance.
- T ires on a vehicle that has been ove rload­
ed can fail suddenly causing loss of con­
t ro l and a c rash.
- Always make sure that the tota l load be­
ing t ransporte d -including the we igh t of
a tra iler hi tc h and the tongue weight o f a
loaded trailer -does not make the vehi ­
cle heavier t han the vehicle's Gross Vehi­
cle Weight Rating.
A WARNING
- Incorrect tire pressures and/or underin­ flation can lead to a serious or fata l acci­
dent .
-
Tire s an d wheel s 251
-Inco rrect tire pressures and/or unde rin­
flation ca use increased tire wear and can
affect the handling of the vehicle .
- Incorrect tire pressures and/or underin­
flation can a lso lead to sudden t ire fail­
ure, including a blowout and sudden de­
f lation, caus ing loss of veh icle control.
Checking tire pressure
The correct tire pressure for the tires original­
ly installed on your vehicle is listed on the tire
pressure label located on driver's side 8-pil­ lar .
The recommended tire pressures are on the
tire pressure labe l and in the table
¢ page 249 , Cold tire inflation pressure. This
means that the pressure m ust be checked and
adjusted when the t ire has not been dr iven fo r
more than a couple of mile s (kilometers) a t
l ow speeds d uring the previous th ree ho urs.
Air in the tires expands when the tire hea ts up
as a result of interna l friction as it flexes in
u se . T he t ire pressure is higher when the tire
has warmed up than when it is "cold."
It is the inflation pressure in a "co ld" t ire that
counts . Therefore, you should never let air out
of a warm tire to match "Cold tire inflat ion
pressure" recommendat ions ¢
page 249 . The
tires would then be underinflated and co uld
fail suddenly .
The tire pressure label on your Audi lists the recommended co ld tire inflation pressures at
maximum capacity for the new, orig inal
equipment tires that were on your ve hicle at
the time it was manufactured. For the loca ­
tion of the label¢
page 249, fig . 208 .
Most tires lose air naturally over t ime . They
can a lso lose some air if you drive over a pot­
ho le or hit a curb while park ing.
It is usually
not possible to see whether the rad ial tires
used today are under inflated just by loo kin g
at them.
T herefo re, be sure to check t ire pressu res at
least once a month and a lways before going
o n a long t rip. Ma ke su re to ta ke t he number ..,.
•
•

252 Tire s and wheel s
of people and the amount of luggage into ac­
count when adjusting tire pressure for a trip -
even one that you would not consider to be
"long." See
c> page 2 53 , Tires and vehicle
load limits
for more importan t information.
A lways use an accurate tire pressure gauge
when checking and adjusting inflation pres­
sures . Check all of the t ires and be sure not to
f orget the spare tire. If the pressure in any tire
is too high when the tire is "cold," let air out
of the t ire slowly with the edge of the tire
gauge and keep checking the pressure until
you reach the pressure that is cor rect for the
l oad (passenge rs and luggage) a nd kind of
d riving you plan to do.
If the p ress ure in any tire is too low, note the
d iffe rence between the pressure in the cold
tire and the pressure yo u need and add the a ir
that yo u need to reach the correct pressure for
the vehicle load (passengers and luggage) for
the tires on your vehicle as listed on the on
you r veh icle and in this manua l and the k ind
of dr iving you plan to do.
Never exceed the ma ximum infl ation pre s­
sure li sted on the tire sidewall for any rea­
son.
Remember that the vehicle manufacturer, not
the tire manufacture r, determines the correct
tire pressure for the tires on your vehicle.
It is important to check the tire pressu re when
the tires are cold .
- Read the requ ired t ire pressu re from the tire
pressure label. The tire pressu re labe l is lo­
cated on the drive r's side 8-p illar.
- T urn the valve stem cap counter-clockwise
to remove it from the tire valve.
- Place the air pressu re ga uge on the valve .
- The tire pressures should only be checked
and adjusted when the tires a re cold. The
s li ghtly raised pressu res of warm tires must
not be reduced.
- Adjust the tire pressure to the load you are
carrying.
- Re install the valve stem cap on the valve .
When should I check the tire pressure?
The co rrect tire pressu re is especially impor­
tant a t high speeds. The pressu re should
therefore be checked at least once a month
and always before sta rting a jo urney . Do not
forget to check the tire pressure for the spare
whee l
c> page 268 .
When should I adju st the tire pres sure s?
Adjust the tire pressure to the load you are
ca rrying . After cha ng ing a whee l
or replacing
whee ls you have to adjust the tire press ure s
on all whee ls. In addition, yo u m ust then
store the new tire pressures in t he tire pres­
sure monitoring system*
c> page 263.
A WARNING
=
Incorrect tire pressures and/or underi nfla-
tion can lead sudden tire fa ilu re, loss of
control, collision , serio us pe rsonal injury
or even dea th.
- When the wa rn ing symbol
[IJ appears i n
the ins trument clus ter, stop and inspec t
the t ires.
- I nco rrect tire pressure a nd/or underinfla­
tion c an cause increase d tire wea r and
can a ffect the hand ling of the vehicle and
stopping abi lity.
- I nco rrec t tire pressures an d/or underin­
flation can a lso lead to s udden t ire fail ­
ure, including a blowout and sudden de­
flation, ca using loss of vehicle contro l.
- The driver is responsible for the co rrect
tire pressures for all tires on the vehicle .
The applicable pressure values are locat ­
ed on a sticke r on the dr iver's s ide B-pil­
lar.
- Only when all tires on the vehicle are fil­
led to the correct pressure, the t ire pres­
sure mon itor ing* system can work cor­
rectly .
- The use of incorrect tire pressure va lues
can lead to acc idents or other damage .
Therefore it is essential that the drive r
observe the spec ified t ire pressu re val ues
for the tires and the correct pressures for
II),

,....,
N ,....,
N
0 J:
'SI: ,...., \!) ..,.,
,...., ..,., ,....,
th e f unct ion of the tire pressure monitor­
ing system*.
- Always inflate tires to the recommended
and correct tire pressure before driving
off.
- Driving with under inflated tires bend
more, letting them get too hot resu lting
in tread separation, sudden t ire failure
and loss of control.
- Excessive speed and/overloading can
cause heat build-up, sudden tire fail ure
and loss of control.
- If the t ire pressure is too low or too high,
the tires w ill wea r prematurely and the
vehicle will not hand le we ll.
- If the t i re is not flat and you do not have
to change a w heel immed iate ly, dr ive at
reduced speed to the nearest serv ice sta­
t ion to check the tire pressure and add
air as requi red.
{Q) Note
Dr iving without va lve stem caps ca n cause
damage to the tire va lves . To preve nt this,
always ma ke s ure t hat facto ry installed
va lve stem caps on all wheels a re secu re ly
mounte d on the va lve.
@ For the sake of the environment
Unde rinflat ed tires will a lso inc reas e the
fue l cons umption .
Tires and vehicle load limits
There are l imits to the amo un t of load or
weight that any vehicle and any tire can carry .
A veh icle that is overloaded w ill not handle
w ell and is more difficult to stop. Overload ing
can not only lead to loss of vehicle contro l,
but c an a lso damage import ant parts of the
ve hicle and can lead to sudden tire failure, in­
cluding a blowout and sudden deflation that
can cause the ve hicle to crash .
Your safety and that of your passengers a lso
depends on making sure that load limits are n ot exceeded. Vehicle load includes everybody
and everyth ing in and on the vehicle . Th ese
Tire s an d wheel s 253
load lim its are technically referred to as the
vehicle's
Gross Vehicle Weight Rating
("GVWR").
T he "GVWR" incl udes the weight of the basic
vehicle, a ll factory installed accessories, a f ull
tan k of fuel, oi l, coo lant and other fluids plus
max imum load. The max imum load incl udes
the n umber of passengers t hat the vehicle is
intended to carry ("seat ing capac ity") with an
ass umed we ight of 150 lbs (68 kg) fo r each
passenger at a designated seating posi tion
and the tota l weight of a ny luggage i n the ve­
hicle. If you tow a tra ile r, the we igh t of the
tra iler hi tch and the tongue we igh t of t he
loaded tra iler mus t be included as part of the
vehicle load .
T he
Gro ss Axle Weight Rating (" G AWR ") is
the max imum load th at can be appl ied a t each
of the veh icle's two axles .
T he Gross Vehicle Weight Rat ing and t he
G ross Ax le Weig ht Ra ting are listed on the
sa fe ty comp lian ce sti cke r la bel lo cate d on the
driver's side B-pillar. Yo ur Audi has
5 seat ing
pos itions , 2 in the front and 3 in the rea r for
total seating capacity of 5. Vehicles with pow­ er indiv idual rear seats* have 4 seating posi­
tions, 2 in the front and 2 in the rear for total
seat ing capac ity of 4. Each seating position
has a safety belt
c::> page 143, Safety belts.
T he fact that there is an upper limit to you r
vehicle's Gross Vehicle Weight Rating means
that the to tal weight of whatever is being car­
ried in the vehicle ( includ ing t he weight of a
tra ile r hitch a nd the tongue we ight of t he
loaded tra ile r) is lim ited. The more passen­
gers in the vehicle or passe ngers who are
heavier th an the sta ndard we ights assumed
mean tha t less we igh t can be carried as lug­
gage.
T he tire pressure label o n your Aud i also lis ts
the max imum combined weight of all of the
occupants and l uggage or other cargo that
the ve hicle can carry. For the location of the
l abel
c::> page 249, fig . 208. IJ>-
•
•

254 Tires and wheels
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se­
rious personal injury, and even death.
- Carrying more weight than your vehicle
was designed to carry will prevent the
vehicle from handling properly and in­ crease the risk of the loss of vehicle con­
trol.
- The brakes on a vehicle that has been
overloaded may not be able to stop the
vehicle within a safe distance.
- Tires on a vehicle that has been overload­
ed can fail suddenly, including a blowout
and sudden deflation, causing loss of
control and a crash.
- Always make sure that the total load be­
ing transported -including the weight of
a trailer hitch and the tongue weight of a
loaded trailer -does not make the vehi­
cle heavier than the vehicle's Gross Vehi­
cle Weight Rating.
Determining correct load limit
Use the example below to cal­
culate the total weight of the
passengers and luggage or oth­
er things that you plan to trans­
port so that you can make sure
that your vehicle will not be
overloaded.
Steps for Determining
Correct Load Limit
1. Locate the statement "THE
COMBINED WEIGHT OF OC­
CUPANTS AND CARGO
SHOULD NEVER EXCEED XXX
KG OR XXX LBS" on your ve­
hicle's placard (tire inflation pressure label)
¢ page 249,
fig. 208.
2.
Determine the combined
weight of the driver and pas­
sengers that will be riding in
your vehicle.
3. Subtract the combined weight of the driver and pas­
sengers from
"XXX" kilo­
grams or
"XXX" pounds
shown on the sticker
c> page 249, fig. 208.
4. The resulting figure equals
the available amount of car­
go and luggage load capaci­
ty. For example, if the
"XXX"
amount equals 1400 lbs.
and there will be five 150
lbs. passengers in your vehi­
cle, the amount of available
cargo and luggage load ca­
pacity is 650 lbs. (1400-7 SO
(5
X 150) = 650 lbs.)
5. Determine the combined weight of luggage and cargo
being loaded on the vehicle.
That weight may not safely
exceed the available cargo
and luggage load capacity
calculated in Step 4.
6. If your vehicle will be towing
a trailer, load from your trail­
er will be transferred to your .,.

.... N .... N
0 J:
"". .... I.O
"' ....
"' ....
vehicle. Con sult thi s manu al
t o de ter min e how th is re ­
d uce s the avail abl e c argo
a nd lug gage loa d ca pacity of
yo ur vehicle.
,.. Chec k th e tir e s idewa ll
( q page 256 , fig . 212 ) to de­
t e rmine the d esignat ed lo ad
ra ting f or a spec ific ti re .
Tire service life
The service life of tires depends on a lot of
different things including proper installation
and balan cing, correct tire pressure and driv­
ing style.
F ig . 2 10 T ire tread: tread wea r ind ic a tors (TWil
( r------
F ig. 211 Rotating tires for more ev en wea r
Tread W ear Indicator (TWI)
The origina l tires on your vehicle have
1/16 inch (1.6 mm) high "wear indicators"
c::> fig . 210 runn ing across the tread. Depend ­
ing on the make, there will be six to eight of
them evenly placed around the t ire. Marks on
the t ire s idewall (for example " TWI" or other
Tires and wheels 255
symbols) indicate the positions of the t read
wear indicato rs . Worn tires must be replaced .
D ifferent f igures may apply in other countr ies
<=> ,&. .
Tire pressure
Incor rect t ire pressure ca uses p remature wea r
and can cause sudden tire blow -out . For this
reason, tire pressure must be checked at least
once a month
c:> page 251.
Driving style
Drivi ng fast around curves, heavy acce lerat ion
and hard brak ing increase tire wear .
Rotating tires for more even w ear
Fo r all four tires on your vehicle to have the
same service life, we recommend that the
front and rear tires a re rotated ac cord ing to
the tire man ufact urer's suggested tire ro ta­
tion intervals . Please remembe r the follow­
ing:
- Tire rotation in tervals may differ from the
veh icle servi ce interv als outlined in your
Warra nty & Maintena nce booklet.
- The longe r one tire is used in one lo cation
on the vehi cle, the more it wears at certain
points ; there fore, we recommend that you
follow the tire manufact urer's suggested
tire rotation intervals.
- Ve hi cles with front-wheel drive exper ience
more tread wear on the front w heels com­
pared to a ll-wheel dr ive (quattro) .
- Please rotate tires as shown
c::> fig . 211.
- Extra care must be taken when rotating di-
rection-specific tires
c::> page 2 75.
Wheel balancing
The wheels on new ve hicles are balanced.
However, various s ituations dur ing everyday
driv ing ca n cause them to become unba l­
anced, resulting in vib rat ions you can usually
feel t hrough the steer ing whee l.
U nbalanced wheels must be rebalanced to
avo id excessive wear on steering, s uspension
and tires . A whee l must also be reba lanced
when a new tire is insta lled .
Ill-

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
contribution to good road holding and safe
handling when in good condition and properly
inflated
¢ .&. .
We recommend that all work on t ires and
wheels be performed by an authorized A udi
dealer. They are familiar with recommended
procedures and have the necessary spec ial
too ls and spare parts as we ll as the proper fa ­
cilities for dispos ing of the old tires .
Authorized Audi dealers have the necessary information about techn ica l requ irements for
installing or changing tires and r ims.
R eplacing t ires and wheel s
Tires shou ld be rep laced at least in pairs and
not individua lly (for example both front tires
or both rear tires together).
Be s ure to read and heed the information to
the tire pressure monitoring system*
¢page 263.
Always buy rep lacement radial tires that have
the same specifications as the t ires approved
for your ve hicle by Audi. Replacement tires
must always have the same load rating speci ­
fication as the original equipment or approved
optional tires listed in the table¢
page 249.
Audi-approved specification tires are specially
matched to your vehicle and its load limits,
and can contribute to the important road hold­
ing, driving character istics, and safety of the
veh icle. The table(¢
page 249) lists spec ifica­
tions of the t ires approved for the Audi mod­
e ls covered by your Owner's Literature .
The tire pressure labe l located on dr iver 's side
B-pillar
( ¢ page 249, fig. 209) lists the speci­
fications of the orig inal equipment tires in­
stalled on your veh icle at the time it was man­
ufactured .
Federal law requires t ire manufacturers to
p lace standard ized information on the s ide­
wall of all tires ¢
fig. 212 . This information
i dent ifies and desc ribes the fundamental
characterist ics, the quality grade of the tire
and a lso provides a tire ide ntificat io n number
Tire s an d wheel s 257
for sa fety standard certification and in case of
a reca ll.
Tire specifications
Knowledge of tire specifications makes it eas­
ier to choose the co rrec t tires . Radial ti res
have the tire specifications marked on the
sidewa ll, for examp le:
255 /45 R 19 104 H
This co nta ins the following information :
P Indicates the tire is for passenger cars
(where app licab le)
255 Nom inal tire width i n mm of the tire
from sidewall edge to sidewall edge. In
general, the larger the number, the wider
the tire
45 Height/w idth ratio in percent (aspect ra -
t io)
R Tire construct ion: Radial
1 9 Rim diameter code (i n inches)
104 Load ra ting code
H Speed ra ting letter code
XL (or "xl", "EXTRA LOAD" or "RF") Indicates
t h at the t ire is a "Reinfo rced" or an " Ext ra
Load " tir e
M+S (or "M/S") Indicates that the ti re has
some mud and snow capab ility
The tires could also have the informat ion of
direction of rotat ion ¢
page 245 .
Tire manufacturing d ate
The manufact uring date is also indicated on
the tire sidewall (possibly only on the
inner
s ide of the wheel):
"DOT ... 2214 .. . " means, for example, the tire
was produced in the 22nd week of 2014.
Speed rating (letter code )
The speed rating le tter code on the whee ls in­
dicates the maximum permiss ible road speeds
¢ .&. in Winter tires on page 261.
P up to 93 mp h (150 km/h)
Q up to 99 mph (158 km/h)
R up to 106 mph (170 km/h)
S up to 110 mph (180 km/h)
•
•

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 . ..,_

26 2 T ire s and wheel s
chains because the vehicle will be ex­
tremely low. If you do drive with snow
chains on while the vehicle is at this lev­
el, the snow chains might severe ly dam­
age the wheelhouse and other parts of
the veh icle.
(D} Tips
Where snow chains are mandatory oncer­
tain roads, this normally also applies to
veh icles with All Wheel Drive.
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of whee l bolts is matched to the
factory installed r ims. If different rims
are fit­
ted, the correct wheel bolts with the right length and correctly shaped bolt heads must
be used. This ensures that wheels are fitted
secure ly and that the brake system functions
correctly .
In certain circumstances, you may not use
wheel bolts from a different vehicle -even if it
is the same mode l
¢page 292.
_& WARNING
Imprope rly tig htened o r maintained whee l
bolts can be come loose ca using loss of
contro l, a co llision and serious persona l in­
jury.
- Always keep the wheel bol ts and the
threads in the wheel hubs clean so the
wheel bolts can tu rn easily and be prop­
er ly tightened .
- Never grease or oil the wheel bo lts and
the threads in the wheel h ubs. They can
become loose w hile driving if greased or
oiled, even if tightened to the specif ied
torque.
- Only use wheel bolts that belong to the rim being installed.
- Never use different whee ls bolts on your
vehicle.
- Always maintain the correct tighten ing
torq ue for the wheel bo lts to reduce the risk of a whee
l loss. If the tightening tor­
que of the wheel bolts is too low, they
can loosen and come out when the vehi­
cle is mov ing. If the tighte ning torque is
too high, the wheel bolts a nd threads
can be damaged and the whee l can be­
come loose.
([) Note
The specified torque for the whee l bolts is
90 ft lb (120 Nm) with a tolerance of± 7,4
ft lb(± 10 Nm). Torque whee l bolts diago­
nally. Afte r changing a whee l, the torque
must be checked as soon as possible wi th a
torque wrench -pre ferably by an au thor­
ized Audi dealer or qualified workshop .
Low aspect ratio tires
Your Audi is factory-equipped with low aspect
ratio tires. These tires have been thoro ughly
tested and been se lected specifically for your
model for their superb performance, road fee l
and hand ling u nder a var iety of d riv ing condi ­
t ions . As k your author ized Audi dealer for
more details.
The low aspect ratio of these tires is ind icated
by a numeral of
55 or less in the tire's s ize
designation . The numeral rep resents the ratio
of the t ire's s idewa ll height in relation to its
t read width ex pressed in percentage. Conven­
tiona l tires have a he igh t/w idth rat io of 60 or
more.
The performanc e of low -a sp ec t-ratio tires i s
pa rticularly sensitive to improper inflation
pre ssure . It is therefore important that low
a spect ratio tires are inflated to the specified
pre ssure and th at the inflation pressure i s
regularly checked and maintained. Tire pre s­
s u res should be checked at least once a
month and always befo re a long trip
¢ page 251, Checking tire pressure .
What you can do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w ith potholes, curbs, gull ies .,..

,....,
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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