wheel AUDI A7 2018 Repair Manual

0 0)
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maximum permissible road
speeds. See
also ¢.& in General
information on page 205.
Tire pre ssure mon itoring
system *
means a system that detects
when one or more of a vehicle's
tires are underinflated and illumi­
nates a low tire pressure warning
telltale.
Tread
means that portion of a tire that
comes into contact with the road .
Tread separation
means pulling away of the tread
from the tire carcass.
Treadwea r indicators (TWI)
means the projections within the
principal grooves designed to give
a visual indication of the degrees
of wear of the tread. See
¢ page 214, Treadwear indicator
for more information on measur­
ing tire wear .
Uniform Tire Quality Grading
is a tire information system devel­
oped by the United States Nation­
al Highway Traffic Safety Admin­
istration (NHTSA) that is designed
to help buyers make relat ive com-
Wheels
parisons among tires . The U TQG
is not a safety rating and not a
guarantee that a tire will last for
a prescribed number of miles
(kilometers) or perform in acer­
tain way . It simply gives tire buy ­
ers additional information to
combine with other considera­
tions, such as price, brand loyalty and dealer recommendatio ns. Un­
der UTQG, tires are graded by the
tire manufacturers in three areas :
treadwear, traction, and tempera­
ture resistance. The UTQG infor­
mation on the tires, molded into
the sidewalls.
U.S. DOT Tire Identification
Number (TIN)
T his is the tire's "se ria l number" .
It begins with the letters "DO T"
and indicates that the tire meets
all federal standards. The next
two numbers or letters indicate
the plant whe re it was manufac­
tured, and the last four numbers
represent the week and year of
manufactu re . For example,
DOT .. . 2217 ...
means that the tire was produced
in the 22nd week of 2017 . The
other numbers are marketing co­ des that may or may not be used
.,.
2 11

Wheels
by the tire manufacturer. This in­
formation is used to contact con­ sumers if a tire defect requires a recall.
Vehicle capacity weight
means the rated cargo and lug­
gage load plus 150 lbs. (68 kilo ­
grams) times the vehicle's desig­ nated seating capacity .
Vehicle maximum load on the
tire
means that load on an individual
tire that is determined by distrib­
uting to each axle its share of the
maximum loaded veh ic le weight
and dividing by two.
Vehicle normal load on the tire
means that load on an individual
tire that is determined by distrib­
uting to each axle its share of the
curb weight, accessory weight,
and normal occupant weight (dis ­
tr ibuted in accordance
with¢ ta ­
ble on page
2 17) and d ividing by
two .
Occupant loading and distri­
bution for vehicle normal load
for various designated seating capacities
Re fer to the tire inflation pres ­
sure
label¢ page 215, fig. 190
2 12
for the n umbe r of seating posi­
tions. Refer to the
table ¢ table
on page
217 for the number of
people tha t correspond to the ve­
hicle normal load .
New tires or wheels
Audi recommends having all work
on t ires or wheels performed by
an authorized Audi dealer or au­
thorized Audi Service Facility.
These facilities have the proper
know ledge and are eq uipped with
the required too ls and rep lace­
ment parts.
1>- New tires do not yet have the
optim um gripping properties.
Drive carefully and at moderate
speeds for the first 35 0 m iles
(500 km) with new tires .
1>-Qnly use tires with the same de­
sign, size ( rolling circumfer ­
ence) , and as close to t he same
tread pattern as possible on a ll
four wheels .
.,.Applies to: RS models: only use
tires with the same design, size (ro lling circumfere nce), and the
same tread pattern on all four
whee ls.
1>- Do not replace tires individually.
At least replace bo th tires on the
same axle at the same time .
.,.

..,Audi recommends that you use
Audi Original Tires. If you would like to use different tires, please
note that the tires may perform
differently even if they are the
same size
i=:> &, .
..,If you would like to equip your
vehicle with a tire/rim combina­
tion that is different from what
was installed at the factory, con­
sult with an authorized Audi
dealer or authorized Audi Service Facility before making a pur­
chase
i=:> &, .
Because the spare tire* is differ­
ent from the regular tires instal­
led on the vehicle (such as winter
tires or wide tires), only use the spare tire* temporarily in case of
emergency and drive carefully
while it is in use. It should be re­
placed with a regular tire as soon
as possible.
Applies to: vehicles with all wheel drive: all four wheels must be
equipped with tires that are the
same brand and have the same construction and tread pattern so
that the drive system is not dam­ aged by different wheel speeds .
~ For this reason, in case of emer-
-~ gency, only use a spare tire* that
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Wheels
is the same circumference as the
regular tires.
&_ WARNING
-
-Do not use steel rims that are
17 inches or larger. Other­
wise, damage to the vehicle
and an accident could result.
-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.
...
213

Wheels
-Only use tires that are more than six years old when abso­lutely 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 al­low enough a ir circulation to
cool the brake system. If they
do not, this could increase the risk of an accident.
Tire wear/damage
Fig. 188 Tire profile: trea dwear indica ­
tor
Tire wear
Check the tires regularly for wear.
-Inflation pressure that is too low
or high can increase tire wear
considerably.
l) Obey any applicable regulations in your
country.
214
-Driving qu ickly through curves,
rapid acceleration and heavy
braking increase tire wear.
-Have an authorized Audi dealer or authorized Audi Service Facili­
ty check the wheel alignment if
there is unusual wear.
-Have the wheels rebalanced if an imbalance is causing noticeable
vibration in the steering wheel. If you do not, the tires and other
vehicle components could wear more quick ly.
Treadwear indicator
Original equipment tires contain
treadwear indicators in the tread pattern, which are bars that are 1/16 in (1.6 mm) high and are
spaced evenly around the tire per­ pendicular to the running direc­
tion
c> fig . 188. The letters "TWI"
or triangles on the tire sidewall indicate the location of the tread­
wear indicators.
The t ires have reached the mini­
mum tread depth
l) when they
have worn down to the treadwear
indicators. Replace the tires with
new ones
c> A . "'

Ti re rotation
Rotating the tires regularly is rec­
ommended to ensure the tires
wear evenly. To rotate the t ires,
install the tires from the rear axle
on the front axle and vice versa.
This will allow the tires to have
approximately the same length of
service life.
For unidirectional tires , make
sure the tires are installed accord­ i ng to the running direction indi­
cated on the tire sidewall
¢page 241.
Hidden damage
Damage to tires and rims can of­
ten occur in locations that are hidden. Unusual vibrations in the
vehicle or pulling to one side may indicate that there is tire damage.
Reduce your speed immediately.
Check the tires for damage. If no
damage is visible from the out­
side, dr ive slowly and carefully to
the nearest authorized Audi deal­ er or authorized Audi Service Fa­
cility to have the vehicle inspect­
ed.
A WARNING , ~ -
o Tread that has worn too low or co ...
~ different tread depths on the
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tires can reduce driving safety.
This can increase the risk of an accident because it has a nega­
tive effect on handling, driving
through curves, and braking, and because it increases the
risk of hydroplaning when driv­
ing through deep puddles.
Tire pressure
Fig. 189 Driver's side 8-pillar : tire pres ­
sur e lab el
;;;
--------------- -
(. c ==. ~:t I : I :,. I ) (':~ ) l ~
1111..-... ............................ -.. ..... ..... _ .... "" ................ .. .,_...._,. ..... .............. ... .
-KPA. . PSI
-KPA. . PSI
-KPA. . PSI
Fig. 190 Tire pressur e label
The correct tire pressure for tires
mounted in the factory and for
the spare tire* is indicated on a la­
bel. The label is located on the B-
p illar
¢ fig. 189, ¢ fig. 190. ..,
215

Wheels
Use the tire pressure specified for
a normal vehicle load when the
vehicle is partially
loaded ¢ table
on page 217 .
If driving the vehi­
cle when fully loaded, you must
increase the tire pressure to the
maximum specified
pressure ¢.&. -
Checking/correcting tire
pressure
~check the tire pressure at least
once per month and also check it
before every long drive .
~Always check the tire pressure
when the tires are
cold. Do not
reduce the pressure if it increas­
es when the tires are warm.
~check the label¢ fig . 190 for
the correct tire pressure based
on vehicle load.
~correct the tire pressure if nec­
essary .
~store the new tire pressure in
the Infotainment system
¢ page 224 or ¢ page 226.
~check the pressure in the emer­
gency tire*/spare tire*. Always
maintain the maximum temper­
ature that is specified for the
tire.
216
& WARNING
Always adapt the tire pressure
to your driving style and vehicle
load .
-Overloading can lead to loss of
vehicle control and increase
the risk of an accident. Read and follow the important safe­
ty precautions
in¢ page 218,
Tires and vehicle load limits.
-The tire must flex more if the
tire pressure is too low or if
the vehicle speed or load are
too high . This heats the tire up
too much. This increases the
risk of an accident because it
can cause the tire to burst and
result in loss of vehicle con­
trol.
-Incorrect tire pressure in­ creases tire wear and has a
negative effect on driving and
braking behavior, which in­
creases the risk of an accident.
{tfj) Note
Replace lost valve caps to re­
duce the risk of damage to the
tire valves.
@ For the sake of the environment
Tire pressure that is too low in­
creases fuel consumption.

a co .... N
" N .... 0 00 \,;J ' Tire pressure table
Please note that the information
contained in the following table
was correct at the time of print­
ing, and the information is sub­
ject to change. If there are differ­
ences between this information
and the tire pressures specified
on the label on the driver's side
B­
pillar, always follow the specifica­
tion on the B-pillar label
¢ page 215, fig. 189.
Model/ Tire designation
Engine
Wheels
Make sure that the tire designa­
tion on your tire matches the des­
ignation on the tire pressure label
and the tire pressure table.
The following table lists recom­ mended tire pressures in cold
tires according to the load and
the size of the tires installed.
Tire pressure
Normal load Maximum load
(up to
2/3* people)a>
front rear front rear
PSI kPA PSI kPA PSI kPA PSI kPA
A7: 235/55 Rl 7 99V
32 220 29 200 35 240
38 260
3.0L
255/45 Rl8 99H 32 220 29 200 35 240 38 260
6 cylinders
255/45 Rl8 99V 32 220 29 200 35 240
38 260
255/40 Rl9 l00H 35 240 32 220 38 260 41
280
255/40 Rl9 l00Y 36 250 32 220
38 2
60 41 280
265/35 R20 99H 35 240 32 220 38 260 41
280
265/35 R20 99V 36 250 32 220
38 260 41 280
275/30 R21 98V 38 260 33 230 39 270 41
280
57: 265/35 R20 99V 41 280
35 240 44 300 44 300
4.0L
255/40 Rl9 l00Y 39 270 33 230 42
290 42
290
a-cylinder
275/30 R21 98V 41 280 35 240 44 300 44 300
RS 7 Sportback: 275/35 ZR20 102V 36 250 30 210 39 270 39 270
4.0 L 275/30 ZR21 9aY 41
280 38 260 45 310 45 310
a-cylinder
RS 7 Sportback 275/30 ZR21
9aY 46 320 44 300 51 350 51 350
performance:
4.0 L a-cylinder
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
217

Wheels
A WARNING
Please note the important safe ­
ty precautions regarding tire
pressure
¢ page 215 and load
limits¢ page 218.
Tires and vehicle load limits
There are limits to the amount of
load or weight that any vehicle
and any tire can carry. A 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 deflat ion that can
cause the vehicle to crash .
Your safety and that of your pas ­
sengers also depends on making
sure that load limits are not ex­
ceeded . Vehicle load inc ludes ev­
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi­
cle's
Gross Vehicle Weight Rat­
ing
("GVWR") .
T he "GVWR" inc ludes the weight
of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
2 18
plus maximum load . The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of
150 lbs . (68 kg) for each passen­
ger at a designated seating posi­
tion and the total weight of any luggage in the veh icle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­ ed as part of the vehic le load.
The
Gross Axle Weight Rating
("GAWR") is the maximum load
that can be applied at each of the
vehicle's two axles .
The fact that there is an upper limit to your vehicle's Gross Vehi ­
cle Weight Rating means that the
total weight of whatever is being
carried in the vehic le (inc luding
the weight of a trailer h itch and
the tongue weight of the loaded
trailer) is limited . The more pas­
sengers in the vehicle or passen­
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as luggage .
The Gross Veh icle We igh t Ra ting
and the Gross Axle Weight Rat ing
.,.

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are listed on the safety compli­
ance sticker labe l located on the
driver's side 8 -pillar .
A WAR NING
-
Overloading a vehicle can cause
loss of vehicle contro l, a crash
or other accident, serious per­
sonal injury , and even death .
-Carrying more weight than your vehic le was designed to
carry will p revent the vehicle
from handling properly and increase the risk of the loss of
vehicle control.
-The brakes on a vehicle that has been over loaded may not
be able to stop the veh icle
within a safe dis tance .
-Tires on a vehicle that has been overloaded can fail sud­
d en ly , including a blowout and
sudden deflation, causing loss
of control and a crash .
-Always make su re that the to­
tal load being transported -
includ ing the weight of a trail ­
er hitch and the tongue
we ight of a loaded trailer -
d oes not make t he vehicle
heavier than the vehicle's
Gross Vehicle We ight Rating .
Wheels
Determining correct load
limit
Use the example below to calcu ­
late the total weight of the pas­
sengers and luggage or other
things that you plan to transport
so that you can make sure that
your vehicle will not be overload­
ed .
Steps for Determining Correct
Load Limit
1 . L ocate the statement " THE
COMB INED W EIGH T OF OCCU­
PANTS AND CARGO S HOU LD
NEVER EXCEED XXX KG OR XXX
L BS" on your vehicle's placard
(tire inflation pressure label)
¢ page 215, fig. 189 .
2. Determine the combined
weight of the driver and pas­
sengers that w ill be riding in
your vehicle .
3 . Subtract the combined weight
of the driver and passengers
from
" XXX " kilog rams or " XXX "
pounds shown on the sticker
¢page 215, fig. 189 .
4. T he resulting figure equals the
available amount of cargo and luggage load capacity. For ex­
ample , if the
"XXX " amount
equa ls 1400 lbs . and there
will .,.
219

Wheels
be five 150 lbs. pas seng ers in
your vehicle, th e am ount of
a vail abl e cargo and lug gage
lo ad ca pac ity is 650 lb s.
(1400-750 (5
X 150) = 650
lb s.)
5. Determine the combined weight of lu ggage and c argo
bein g loaded on the vehi cle .
Th at w eight ma y not safel y
ex ­
ceed the a vail able car go and
luggage lo ad capac ity calc ul at­
ed in St ep 4 .
6. If your vehicle will b e towing a
tr aile r, lo ad from your tr aile r
w ill b e tran sferr ed to your
v e ­
hi cle. C onsul t this manual t o
determin e how this re du ces
th e av ailab le cargo and lug­
g age load capa cit y of your v ehi­
cl e.
..,.Che ck th e tire sidewall
(c:::> pa ge 206, fig . 187) to det er­
mine the de signated load rating
for a sp e cific tire.
Wheel bolts and rims
Wheel bolts
Wheel bolts must be clean and loosen/t ighten
easi ly .
Rims
Rims with a bolted rim ring* or w it h bolted whee l
covers " consist of mu ltip le pieces . These compo­
nents were bolted together using specia l bolts
220
and a spec ia l proced ure. Yo u must not repair or
disassemb le them
i::> &. .
A WARNING
Wheel bo lts that are tightened or repaired in­
correct ly can become loose and resu lt in loss
of vehicle contro l, wh ich increases the risk of
an accident . For the correct tighten ing spec ifi­
cation,
see ¢ page 23 7, After changing a
whe el.
- Always keep the wheel bolts and the
threads in the wheel hub clean and free of
grease .
- Only use wheel bolts tha t fit the rim.
- Always have damaged rims repaired by an
author ized Audi dealer or authorized A udi
Serv ice Facility . Neve r repa ir o r disassemb le
rims you rself, because this increases the risk
of an a cciden t.
Winter tires
Win ter tires significant ly imp rove the veh icle's
handling when dr iv ing in winter conditions. Be­
ca use of their construction (width, compound,
tread patte rn), s ummer ti res provide less trac­
tion on ice and snow.
.,. Use winter tires on a ll four wheels .
.,. Only use winter tires that are app roved for yo ur
vehicle .
.,. Please note that the maximum permitted
speed may be lowe r with winter
tires¢ &. in
General information on page
205 . An author­
ized Aud i dealer or authorized Aud i Serv ice Fa ­
cility can inform yo u about t he maximum per­
m itted speed for your tires .
.,. Check the tire p ressure afte r insta lling wheels
¢ page 215 .
The effectiveness of wi nter tires is reduced g reat­
l y when t he tread is wo rn down to a depth of
0.157 i n (4 mm). The cha ra cte ris tics of winte r
t ir es a lso decrease g rea tly as the t ire ages , re­
gard less o f th e remaining t read.