2012 AUDI Q7 tire size

-Never mount used tires on yo ur vehicle if
you are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire failure
and loss of vehicle control.
Glossary of tire and loading terminology
Accessory weight
means the comb ined weight (in excess of
those standard items wh ich may be rep laced)
of automa tic tra nsmission, power steering,
power br akes, power w indows, power sea ts,
radio, and heater, to the ex tent that these
items are avai lab le as factory -installed equip ­
ment (whether installed or not).
Aspect ratio
means the rat io of the height to the w idt h of
the tire in percent. Numbers of 55 or lower in ­
d icate a low sidewall fo r improved s teer ing re ­
sponse and better overall handling on dry
pavement.
Bead
means the pa rt of the t ire t hat is made o f
s teel wires, wrapped o r rein force d by ply cor ds
and that is shaped to fit the r im.
Bead separation
means a b reakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire.
Cold tire infl ation pressure
means t he tire pressure recommended by the
vehicle manufacturer for a t ire of a designated
size that has not been dr iven for more than a
couple of miles (kilometers) at low speeds in
the three hour period before the tire pressure
i s measu red or adjusted.
Tire s an d wheel s 275
-If you notice un usua l vibration or if the
veh icle pulls to one side when driv ing, a l­
ways stop as soon as it is safe to do so and check the wheels and tires for dam­
age.
Curb weight
mea ns the we ight of a motor ve hicle w it h
standard equipment in cl ud ing t he maximum
capa city of fuel, o il, and coolant, ai r cond i­
tion ing a nd addi tional weig ht o f optiona l
equipment .
Extra load tire
means a t ire design to operate at h igher loads
and at higher inflation pressures than the cor­
respondi ng s tanda rd tire. Extra load tires may
be identified as "X L", "xl", "EXTRA LOA D", or
"R F" on the sidewall .
Gross Axle Weight Rating ("GAWR ")
mea ns the load-carry ing capac ity of a s ingle
axle system, measured at the tire-ground in­
te rfaces.
Gross Vehicle Weight Rating ( "GVWR ")
means the maximum total loaded we ight of
t h e ve hicle.
Groove
means the space between two adjacent tread
ribs.
Load rating (code )
means the maximum load tha t a t ire is rated
to carry for a given inflation pressure. Yo u
may not find this information on all tires be­
ca use it is not required by law.
Maximum load rating
me ans the loa d ra ti ng f or a t ire at the maxi­
mum pe rm issi ble inflat ion pressure for that
ti re .
•
•
...

2 76 Tires and wheels
M aximum loaded vehicle weight
means t he sum of:
(a) Curb weight
(b) Accessory weight
( c ) Vehicle capacity we ight, and
(d) P rod uction options weight
Maximum (permissible) inflation pressure
means t he max imum co ld inflation pressu re
to which a tire may be in flate d. Also called
"maxim um inflation p ress ure."
Normal occupant weight
means 150 lbs. (68 kilog rams) times the
nu mbe r of o ccupants seated in t he vehicle up
to the tota l sea ting capaci ty of yo ur vehicle .
Occupant distribution means dist ribution of occupants in a veh icle .
Outer diameter means t he overa ll diameter of a n inf lated new
tire.
Overall width
means t he linear dis tan ce between the ex ter i­
ors o f th e sidewalls of an inflated tire, in cl ud­
ing e levations due to labeling, decorations, or
p rotective bands o r ribs.
Ply
mea ns a laye r of r ubber-coate d parall el c ords.
Production options weight
means t he comb ined we ight of those installed
regular produc tion options weigh ing ove r 5
l bs . (2 .3 kg) in excess of t hose standard items
which they repla ce, no t previously considered
in cur b weight o r acc essory weig ht, incl uding
h eavy duty brakes, r ide leve le rs, roof ra ck,
h eavy duty ba ttery, a nd specia l trim .
Radial ply tire
means a pneumatic t ire in which the p ly co rds
that ex tend to the beads are laid a t sub stan ­
ti ally 9 0 degrees to the ce nt erline o f the
tread . Recommended inflation pressure
see
~
page 2 75, C old tire infla tion pressure.
Reinforced tire
means a t ire design to operate at h igher loads
and at h igher inflation pressures than t he cor­
r espondi ng stan da rd tire. Reinforced tires
may be identifie d as "X L", "xl" , "EX TRA LOAD",
o r "RF " on t he sidewal l.
Rim
means a metal su ppo rt for a tire or a t ire and
tube assembly upon which the tire beads are
seated.
Rim diameter
means nom inal d iameter of the bead seat.
If
you change your wheel s ize, you wi ll have to
purchase new tires to match th e new r im di­
ameter .
Rim size designation
means r im diameter and width.
Rim width
means nom inal d ista nce between rim flanges .
Sidewall
means tha t po rtion of a t ire betw ee n t he
t read and bead.
Speed rating (letter code)
means the speed at which a tire is designed to
be driven for extended periods of time. The
r a ti ngs range from 93 mph ( 150 km/h) to
186 mph (298 km/h)
~ page 286 . You may
not fi nd this information o n all ti res because
it is no t re quir ed by law.
T he speed rating letter code, wh ere applica­
ble , is molde d on the tire sidewall a nd indi­
c ates the max imum pe rmissibl e road speeds
~ A in Winter tire s on page 290 .
Tire pressure monitoring system
mea ns a system that detects when o ne or
more of a ve hicle 's tires are unde rinf lated an d
i lluminat es a low tir e pr essure wa rning t ell-
tal e. ..,_

278 Tires and wheels
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle.
I
4
t>
Fig. 2 37 T ire pressure label: located on driver's side B·
pillar
Tire pressure genera lly refers to the amount
of air i n a tire that it needs it to do its job and
safely carry the combined load of the entire
vehicle and its contents. Tire pressure is measured in kilopasca ls (kPa), the inte rna·
tional measuring unit and in pounds pe r
squa re inch ( PSI). Tire pressure is based in
pa rt o n the vehicle's desig n an d load limit­
the greatest amount of weight that the vehi ·
cle can car ry safe ly and the tir e size . The prop·
er tire pressure is freq uent ly referred to as the
"recommended cold tire inflation pressure."
A ir in the tires expands when the tire heats up
because of internal frict ion when it flexes in
use . The t ire p ress ure is higher when the tire
h as warmed up than when i t is "cold ." It is the
in flat io n pressu re i n a "cold" tire that coun ts.
Th erefore, you sho uld neve r let air ou t of a
warm tire to match " co ld tir e infla tion pres­
sure" recommendations . The ti res wo uld then
be un derinflated and could fail su ddenly.
M ain taining p roper t ire pr es su re is one o f the
most impo rtan t thi ngs you can do to he lp
avoid sudden tire failure. Underinfla ted ti res
a re a major ca use of s udden tire failure. Keep­
ing tires at the right pressure is also impor­
tant for safe and responsive vehicle handling,
traction, braking and load carrying .
Tire pres­
sures are particularly important when th e
vehicle is being driven at higher speeds , and
then especially when heavily loaded even
within the permissible load -carrying capaci ­
tie s approved for your vehicle .
------------------..,;
•(=~: I : I :,.. I)@ ~
The~-----~---w-o- ....... -e.....i -·· - ­u ........ -.-..,.0, ... -....,.,...tot~---....... ._.,. -..
....
-..... ...........
- KPA. a PSI
- KPA.
a PSI
-KPA. a PSI
Fig. 2 38 Tire pressure la bel
SU OWNER'S MANUAl FOR AD0"10NAL l10N VOl!ILEMANU£1. DU _,...,
POUR Pl.US DE
REHSEKi.\'IEME NTS
The recommended tire pressures for your Audi
depend on the kind of tires on your ve hicle
and the numbe r of passengers and/or amount
of luggage you w il l be transporting .
The tire pressure label is located on the driv­
er's si de B-pillar . T he tire pressure label lists
t h e recommended cold tir e inflat io n pressu res
for the vehicle at its maxim um capac ity
we ight and tires that were on your veh icle at
t h e time it was man ufa ctu red.
If you wish to improve comfort when operat­
ing the vehicle at normal load (up to 3 occu­
pants), you can adjust tire pre ssure s to tho se
specified for normal vehicle lo ad. Before op­
erating the vehicle at maximum load, you
mu st increase the tire pres sures to those
specified for maximum vehicle load
c::> .&, .
Bear in mind that the tire pressure mon itor ing
system can only moni to r th e tire pressures
yo u have s to red. The sys tem does not recog­
nize the load condition of your vehicle.
T he effectivene ss of the t ire p ress ure monitor­
ing system will be impaire d if you store nor­
m al loa d press ures b ut t hen o pe ra t e the ve hi­
cl e a t its ma ximum load
c::> .&. .
See the ill ustration c::> fig. 23 7 fo r the lo cat ion
of the label o n driver's s ide B-pill ar (color o f
t h e actu al lab el and exa ct lo cat ion on the ve­
hicle will vary sligh tly).
Note t hat the f ollowing ta ble is ac curate at
th e time of goi ng to press and i s sub ject to

Tires an d wheel s 2 79
change. In the event of discrepancies, the tire
pressure label located on the driver's side 8-
p ill ar a lways takes precedence.
The table be low lists the recommended cold
tire inf lation pressures for the A udi model
I Engine Tire designation
covered by your Owner 's Literat ure at the vehi­
cle's capacity weight and the tire sizes instal­
l ed on the respect ive models as orig inal
equipment, or as a factory option.
Tire pressure
normal load condition full load condition front rear front rear
I
PSI II kPA PSI kPA PSI j[ kPA PSI kPA
2 55/5 5 Rl8 109H XL
All Sea son
265 /50 Rl9 ll0H XL
All Sea son
3.0 /3 .0 TDI 275 /45 R20 ll0H XL
6 -cy lind er All S ea son
275 /45 R20 110V XL
High Performance
295 /35 R21 107V XL
High Performance
35 240 35
35 240 35
35 240 35
35 240 35
36 250 35 240
44
300 49 340
240 44 300 49 340
240 44 300 49 340
•
240 44 300 49 340
I
240 44 300 49 340
XL= reinforced or extra load tire. It may also appear as xl, EXTRA LOAD, or RF on the tire side­
wall.
The correct tire pressure for the spare wheel i s
l ocated on a label on the driver's side 8-pilla r.
Because technical changes may be made to
vehicle equ ipment dur ing the model year , al­
ways compare the tire size designation on the
tire pressure label on your vehicle w ith the
tires on you r vehicle. Ma ke su re that the tire
si ze information on the ve hicle label is the
same as the s ize of the t ires on the vehicle.
This is especially important if the vehicle be­ l ongs to someone else or you bought the vehi­
cle with different rims/tires or you bought the
ve hicle as a previously owned vehicle.
Remember, your safety and that of your pas­
sengers also depends on making sure that
l oad limits are not exceeded. Vehicle load in­
cludes everybody and everything in and on the
vehicle. These load limits are technically refer­ red to as the vehicle's Gross Vehicle We ight
Rating ("GVWR") . The Gross Axle Weight Rat­
i ng ( "GAWR") is the maximum load that can
be appl ied at each of the veh icle's two axles.
The G ross Vehicle Weight Rating and the Gross Axle Weig
ht Rating are listed on the
safety comp liance sticker label located on the
drive r's side 8-pillar . The tire pressure labe l on
yo ur A udi lists t he maxim um combined
weight of all o f the occ upants and luggage or
othe r cargo that t he vehicle can carry. Fo r the
location of the tire press ure label ¢
fig. 23 7.
A WARNING
Overloading a vehicle can cause loss of ve­
h icle control, a crash or other accident, se­
rious personal injury, and even death.
- Carrying more we ight than your veh icle
was des igned to carry will prevent the
veh icle from handling properly and in­
crease the risk of a loss of vehicle con­
trol.
- The brakes on a vehicle that has been overloaded may not be able to stop the
veh icle w ith in a safe distance.
- T ires on a vehicle that has been overload ­
ed can fail suddenly ca using loss of con-
trol and a crash . ..,.
•
•

284 Tires and wheels
Tire service life
The service life of tires depends on a lot of
different things including proper installation
and balancing, correct tire pressure and driv­
ing style.
Fi g. 2 39 Tire tread: tre ad wea r ind icators (TWI)
F ig. 240 Rotat ing t ires for more ev en wea r
Tread Wear Indicator (TWI)
The o rigi na l tires on your veh icle have
1/16 inch (1.6 mm) high "wear indicators"
.... N M
c::> fig . 239 running across the tread. Depend ­
i ng on the make, there will be six to eight of
them evenly p laced around the t ire. Marks on
the tire sidewa ll (for example "TWI" or other
symbols) indicate the positions of the tread
wear ind icators . Worn t ires must be replaced .
Different fig ures may apply in o ther countries
c::> & .
Tire p res sure
Incorrect tire pressure causes premature wear
a nd can cause sudden t ire blow-out. For th is
reason, tire pressure must be checked at least
once a month
c::> page 280.
Driving style
Driving fast aro und curves, heavy acce leration
and hard braking increase tire wear.
Rotating tires for more even wear
F or all four tires on your ve hicl e to h ave the
same service life, we recommend that the
front and rear t ires are rotated according to
the tire manufacturer's suggested tire rota­
tion intervals. Please remember the follow­
ing :
- Tire rotation intervals may differ from the
vehicle service inte rva ls o utlined in your
Warranty
& Maintenance booklet .
- The longer one tire is used in one location
on the vehicle, the more it wears at certain
points; therefore, we recommend that you
follow the tire manufact urer's suggested
tire rotation intervals .
- Vehi cles w ith front-wheel dr ive experience
more tread wear on the front wheels com­
pa red to all-wheel drive (quattro ®).
- Please rotate tires as shown
c::> fig. 240.
-Extra care must be taken when rotating di-
rection-specific tires
c::> page 302 .
Wheel balancing
The wheels on new ve hicles are balanced .
However, various situations during everyday
driving can cause them to become unbal ­
anced, re sulting in vibrat ions you can usually
feel through the steer ing wheel.
Un balanced whee ls must be rebalanced to
avoid excessive wear on steering, suspension
and t ires. A whee l must also be reba lanced
when a new tire is insta lled.
Incorrect wheel alignment
Incor rect wheel alig nment can cause exces ­
sive tire wear, impairing the safety of the veh i­
cle . If tires show excessive wear, have the
whee l alignment checked by an authori zed
Audi dealer or qualif ied workshop .
All-wheel driv e
Vehicles with q uattro ® mus t always have tires
of the same size, construction and tread type .
For details see
c::> page 225. ..,.

288 Tire s and whee ls
- All four wheels must be fitted with radia l
t ires of the same type, size (rolling c ir­
cumference) and the same tread pattern.
Driv ing with different tires reduces veh i­
cle handling and can lead to a loss of
control.
- If the spare tire is not the same as the
t ires that are mounted on the veh icle -
for example with winter tires - on ly use
the spare tire for a short period of time
and dr ive with extra care. Refit the no r­
ma l road whee l as soon as safely possi ­
ble.
- Never drive faster than the maxim um
speed for which the tires on your vehicle
are rated because tires that are driven
faster than their rated speed can fail
sudden ly.
- Overloading ti res cause heat build-up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- Temperature grades app ly to tires that
are properly inflated and not over or un­
derinflated.
- For technical reasons it is not a lways
poss ible to use wheels from other vehi­
cles -in some cases not even whee ls
from the same vehicle model.
- If you install wheel tr im discs on the ve­
hicle whee ls, make sure that the air flow
to the brakes is not blocked . Reduced air­
flow to the brakes can them to overheat,
increasing stopping d istances and caus­
ing a collision.
- Run flat t ires may on ly be used on vehi­
cles that were equipped with them a t the
facto ry. The vehicle mus t have a chassis
desig ned for run flat tires. Incorrect use
of run flat tires can lead to vehicle dam­
age or accidents. Check with an a uthor­
ized Audi dea ler or tire specialist to see if
your vehicle can be equ ipped w ith run
flat tires. If run f lat tires are used, they
must be installed on all four wheels. M ix­
ing t ire types is not permitted. (D Note
- For technical reasons, it is not generally
possible to use the wheel rims from oth­
er veh icles. T his can hold tr ue for wheels
of the same vehicle type.
- If the spare tire is different from the tires that you have mounted on your ve­
hicle (for example winter tires or wide
profi le tires), then use the spare tire for a
short period of time only and drive w ith
extra care. Replace the flat tire w it h the
tire mat ching the othe rs on your vehicle
as soon as possib le.
- Never d rive without the valve stem cap.
The va lves cou ld get damaged.
@ For the sake of the environment
D ispose of o ld tires in accordance w ith the
l ocal requirements.
Uniform tire quality grading
- Tread wear
- Traction AA A B (
- Temperature ABC
Quality grades can be found where applicable
on the t ire s ide wall between tread shoulder
and maximum section width
¢ page 285,
fig. 241 .
For e xample: Tread wear 2 00 , Traction AA ,
Temperature A .
All passenger car tires must conform to Feder­
al Safety Requirements in addition to these
grades .
Tread w ear
The tread wear g rade is a comparative rating
based on the wear rate of the tire when tested
u nder contro lled conditions on a specified
government test course.
For example, a tire graded 1S0 wo uld wear
one and one ha lf (11/2) times as well on the
government course as a tire graded 100.

The relative perform a nee of ti res depends
upon the actua l conditions of their use, how ­
ever, and may depart sign ificantly from the
norm due to var iat ions in dr iving habits, serv­
ice practices and differences in road character­
istics and climate .
Trac tion
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 under controlled cond itions on
specified government test surfaces of asphalt
and concrete . A tire marked C may have poor
traction performance ¢,&. .
Temp erature
The temperature grades are A (the h ighest),
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 controlled condi­
tions on a specified i ndoor laboratory test
wheel.
Sustained high temperature can cause the
materia l of the tire to degenerate and reduce
tire life, and excessive temperature can lead
to sudden ti re fa ilu re ¢ ,&. .
The grade
C corresponds to a level of perform ­
ance which all passenger car tires must meet
u nder the Federa l Moto r Veh icle Safety Stand­
a rd No.
1 09. G rades Band A represent h igher
l eve ls of perfo rmance on the laboratory tes t
wheel than the m inimum required by law .
A WARNING
The traction grade assigned to this ti re is
based on stra ight-ahead b raking t raction
tests, and does not include acceleration,
cornering, hydrop lan ing or peak traction
character istics.
A WARNING
The temperature grade for this t ire is es­
tablished for a t ire that is p roperly inflated
and not overloaded. Excessive speed, un­
derinflation, or excessive loading, either
-
Tire s an d wheel s 289
separately or in combinat ion, can ca use
heat bui ldup and possible tire failure.
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 winter o r "snow" tires, those
with very deeply cut tread. These tires should
o nly be used in pairs and be installed o n all
four wheels . Make sure you purchase snow
t ires that are the same size and construction
type as the other tires on you r vehicle.
Your vehicle is equipped with all-wheel drive,
th is w ill improve traction during winter driv­
i ng, even with the standa rd tires . However, we
strong ly recommend that you always equip all
fo ur wheels on you r vehicle wit h corre ct ly fit­
ted winter tires or all-season t ires, when win­
te r road cond itions are expected . This also im ­
proves the veh icle's braking per formance and
reduces stopping dista nces.
Summe r tires provide less grip on i ce and
snow.
Winter tires (snow tires) must always be fitted
o n all fo ur wheels .
Ask your authorized Audi dealer or qualified
workshop for permitted
winter tire size s. Use
o nly rad ial w inter t ires.
Winter tires lose their effectiveness when the
tread is worn down to a depth of
0 .157 inch
(4 mm) .
Only drive w ith w inter t ires under w inter con­
dit ions. Summer t ires handle better when
there is no snow or ice on the roads and the
temperature is above 45 °F (7 °() .
If you have a flat tire, see notes on spare
whee l
¢page 285.
Please a lways remember that winter tires may
have a lowe r speed rating than the tires o rigi -
nally installed on your vehicle at the time it .,.
•
•

29 0 T ire s and wheel s
was manufactured . Please see ¢ page 286,
Speed roting (letter code) for
a listing of the
speed rating letter codes and the maximum
speed at which the t ires can be driven.
The speed rating letter code ( ¢
page 2 76) is
on the side wall of the tire ¢
page 285.
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
w inter t ires. This will cause damage to the
tires leading to an accident and serious
personal inj ury 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 fai lure in­
cluding a blowout and sudden deflation,
loss of control, crashes and serious per­
sonal injuries. Have worn or damaged tires
rep laced immed iate ly .
- Winter tires have maximum speed rat ing
that may be lower than your veh icle's
maximum speed .
- Never drive faster than the speed for
w hich the winter or other tires installed
on your vehicle are rated.
A WARNING
Always adjust your d riving to the road and
traffic conditions. Neve r let the good ac­
celeration of the wi nte r t ir es and all-whee l
dr ive temp t you in to taking extr a ris ks. A l­
ways remember:
- Whe n bra king, an a ll-wheel d rive vehicle
hand les in the same way as
a front drive
vehicle.
- Drive caref ully and reduce your speed on
icy and slippery roads, even winter tires
cannot he lp under black ice conditions.
{® For the sa ke of the env ironment
Use summer tires when weather condi­
tions permit. They are qu ieter, do not wear
as quickly and reduce fuel consumption.
Snow chains
Snow cha ins may be f itted only to the rear
whee ls, and only to certain tire sizes . Ask your
autho rized Aud i dealer on which tire sizes
snow c hains ca n be used.
The snow chains must have low-prof ile links
and must not be t hicker than 0.53 inch
(13 .5 mm), includ ing the loc k.
Remove wheel center covers and trim discs
before putt ing snow chains on your vehicle
¢ @ . For safety reasons cover caps must then
be fitted over the wheel bolts. These are ava il­
able from autho rized Aud i deale rs.
A WARNING
Using the wrong snow chai ns for your veh i­
cle o r insta lling them inco rrect ly can in­
crease the risk of loss of cont ro l leading to
se rious pe rsonal injury.
- Snow chains are available in different
sizes. Always make sure to follow the in ­
structions p rov ided by the snow chain
manufacturer.
- When driving with snow chains never
drive faster than the speed permitted for
your specif ic snow chains.
- Always observe local regulations .
(D Note
-Remove snow chains before dr iv ing o n
roads not covered with snow to avoid
damaging tires and wea ring the snow
chains down unnecessarily.
- Snow chains, which come into direc t con ­
tact with the whee l rim, can scratch or
damage it . Therefo re, make sure that the
snow chains are s uitably covered. Check
the pos ition of the snow chains after