tire size AUDI TT ROADSTER 2011 Owners Manual

Safety belts
General notes
Always wear safety belts!
Wearing safety belts correctly saves lives!
This chapte r exp lains why safety be lts a re nec­
essary, how they work and how to adjust and
wear them correctly.
~ Read a ll the informat ion that fo llows and
heed all of the inst ruct ions and WARNINGS.
A WARNING
Not wearing safety belts or wearing them
imp roperly increases the risk of ser ious
personal in jury and death .
- Safety belts are the sing le most effective
means availab le to red uce the r isk of se­
rious injury and death in a utomob ile acci­
dents . For your prot ecti on and that of
yo ur passenge rs, always co rrec tly wear
sa fe ty bel ts when the ve hicle is mov ing.
- P re g nant women, injured, or physically
impa ired perso ns must also use safe ty
belts. L ike a ll vehicle occup ants, they are
more like ly to be ser ious ly injure d if they
do not wea r safety be lts . The best way to
protect a fet us is to protect the mother -
thro ughout the entire pregnancy.
Number of seats
Your Audi TT Roadster has two seating posi­
tions. Each seat ing pos ition has a safety be lt.
A WARNING
Not wearing safety belts or wearing them
improper ly increases the risk of ser ious
personal in jury and death.
- Never st rap more than one person, in­
clu ding small ch ild ren, into any belt. It is
especially dangerous to place a safety
belt over a child s itting on yo ur lap.
- Never let mo re people ride in the ve hicle
t h an t he re a re safety be lts ava ilable.
Sa fety belts 107
- Be s ure everyone riding in the vehicle is
properly restrained w ith a separate sa fe­
ty belt or child restra int.
4 Safety belt warning light
Your vehicle has a warning system for the
driver and front seat passenger to remind you
about the importance of buckling-up.
Fi g. 1 10 Safety be lt warn ing lig ht in the instr ume nt
cl uster -enla rged
Befor e driv ing off, always :
~ Fasten your sa fe ty belt and make su re you
wear it p roperly.
~ Make s ure that yo ur passenge rs a lso buck le
up and properly wear their safety be lts.
~ Protect childre n with a child rest raint sys-
tem appropriate for the size and age .
The wa rning light . in the instrument cluster
li ghts up w hen the ig nit ion is switched on as a
remi nder to fasten the safety belts. In addi­
tion , you will hear a warning tone for a certa in
per iod of t ime .
Fasten your safety belt and make sure that
your passengers also properly put on their saf ety belts .
A WARNING
-Safety belts are the s ingle most effect ive
means ava ilable to reduce t he risk of se­
rio us i nju ry and de ath in au tomobile a cci­
dents . Fo r yo ur pro tection and tha t of
your passen gers, a lways correctly wear
safety belts when t he ve hicl e is moving .
- Fail ure to p ay att ent io n t o the wa rni ng
lig ht that come on , could lead to person ­
a l injury . •
•

-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 eq uip ­
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 o r lower in ­
d icate a low sidewall fo r improve d steer 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 reinforce d by ply cor ds
and that is shaped to fit the r im.
Bead separation
means a b reakdown of the bond between
com ponents in the bead .
Cord
means the strands forming the plies in the
tire .
Cold tire infl ation pres sure
means the 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 195
-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
capacity of fuel, o il, and coolant, ai r cond i­
tion ing and addi tional weig ht o f optiona l
equipment .
Extra load tire
means a t ire designed to operate at higher
loads and at highe r inflat ion p ressu res tha n
th e co rresponding standard tire. Extr a load
tir es my be i dent ified as "X L", "xl", " EXTRA
L O AD", or "RF" on t he 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 ")
mea ns 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 rate d
to ca rry for a given inflation press ure. 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 ting f or a t ire a t the maxi­
mum pe rm issi ble inflat ion pressure for that
ti re . •
•
...

196 Tires and wheels
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity we ight, and
(d) Production options weight
Maximum (permissible) inflation pressure
means the maximum cold inflation pressu re
to which a tire may be inflated. Also called
"maximum inflation p ressure."
Normal occupant weight
means 150 lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
to the total seating capacity of your vehicle.
Occupant distribution means distribution of occupants in a vehicle .
Outer diameter means the overa ll diameter of an inf lated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ­
ing e levations due to labeling, decorations, or
protective bands or ribs.
Ply
means a laye r of rubber-coated parallel cords.
Production options weight
means the comb ined we ight of those installed
regular production options weighing over 5
lbs . (2 .3 kg) in excess of those standard items
which they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, r ide leve lers, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tir e in which the p ly cords
that extend to the beads are laid at substan­
tially 90 degrees to the centerline of the
tread . Recommended inflation pressure
see
~
page 195, Cold tire inflation pressure.
Reinforced tire
means a t ire designed to operate at higher
loads and at higher inflation p ressures than
the corresponding standard tire. Reinforced
ti res my be ident ified as "XL" "xl" "E XTRA
, ,
LOAD", or "RF" on the sidewall.
Rim
means a metal support for a tire or a t ire and
tube assembly upon which the tire beads are seated.
Rim diameter
means nominal d iameter of the bead seat. If
you change your wheel s ize, you w ill have to
purchase new tires to match the new r im di­
ameter .
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between rim flanges .
Sidewall
means that portion of a tire between the
tread 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 atings range from 93 mph (150 km/h) to
186 mph (298 km/h)
~ page 206 . You may
not find this information on all tires because
it is not requ ired by law.
T he speed rating letter code, where applica­
ble, is molded on the tire sidewall and indi­
cates the maximum perm iss ibl e road speeds
~ A in Winter tires on page 209 .
Tire pressure monitoring system
means a system that detects when one or
more of a veh icle's tires are underinflated and
i lluminates a low tire pressure warning tell-
tale. ..,_

198 Tires and whe els
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle .
Fig. 14 6 Tire p ress ure labe l: loca ted on dr iver 's side B ·
p ill ar
Tire pressure generally refers to the amount
of air in a t ire 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 interna·
tional measuring unit and in pounds per
squa re inch (PSI). Tire pressure is based in
part o n the vehicle's design and load limit­
the greatest amount of weight that the vehi·
cle can carry safe ly and the t ire size. The prop·
er tire pressure is freq uently 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 ressure is higher when the tire
has warmed up than when it is "cold ." It is the
i n flat ion pressure in a "cold " tire that counts.
Therefore, you shou ld neve r let air ou t of a
warm tire to match " co ld tir e infla tion p res­
sure" recommendations . The tires wo uld then
be underinflated and could fail su ddenly .
M aintaining p roper t ire press ure is one o f the
most impo rtan t things you can do to he lp
avoid sudden tire failure. Underinflated ti res
are a major cause 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 .
Tir e pres­
s ur es are part icularly important wh en th e
vehicl e is being driven at higher speed s, and
then es pecially wh en heav ily loaded even
w ithin th e permis sible load -carrying capa ci­
tie s approv ed for y our vehi cle.
,;
•(=~: I : I :,.. I)@ ~
The~-----~---w-o- ....... -e.....i -·· - ­u ........ -.-..,.0, ... -....,.,...tot~---....... ._.,. -..
....
-..... ...........
- KPA. a PSI
- KPA.
a PSI
- KPA.
a PSI
Fig . 14 7 Tir e pressure labe l
SEE OWNER'S MANUAl FOR
A DOMlONAL
T10N VOl!ILEMANU£1. DU _,...,
POUR P\.US DE
REHSEKiloiEMENTS
The recommended tire pressures for your Audi
depend on the kind of tires on your veh icle
and the number of passengers and/or amount
of luggage you w ill be transporting .
The tire pressure label is located on the driv ­
er's side B-pillar . The tire pressure label lists
the recommended cold t ire inflat io n pressures
for the vehicle at its maxim um capac ity
we ight and tires that were on your veh icle at
the time it was manufa ctu red .
If you wish to impro ve comfort when operat­
ing the v ehicle at normal lo ad (no luggag e)
up to 2 occupant s, you can adju st ti re pr es­
sures to tho se spe cified f or normal vehi cle
load. Before oper ating th e vehicl e at maxi­
mum load, yo u must increase the tire pr es­
sure s to tho se spe cified f or ma ximum vehicle
load ~.&. .
Bear in mind that the tire pressure mon itor ing
system c an only moni to r the tire pressu res
you have stored. The sys tem does not recog­
nize the load condition of your veh icle.
T he effec tiveness of the t ire press ure monitor­
i ng system will be impaire d if you store nor­
mal load pressures but then operate the vehi ­
cle at its maximum load
~ .&. .
See the ill ustration ~ fig. 146 fo r the locat io n
of the label on d river 's s ide B-pillar (colo r of
the actual label and exact location on the ve-
hicle will vary slight ly) .
IJi,,

Tires and wheels 199
Note that the following tab le is accurate at
the time of going to press and is subject to
change. In the event of discrepanc ies, the tire
pressure label (on dr iver's side B-pillar) always
takes precedence .
The table be low lists the recommended cold
tire inf lation pressures for the Audi model covered
by your Owner 's Literature at the vehi­
cle's capacity weight and the tire sizes instal­
l ed on the respective models as orig inal
equipment, or as a factory option.
Engine II Tire designation Tire pressure front Tire pressure rear l
(dis-
full load full load
place- normal load
condition normal load
condition
ment in condition
(2 occupants condition
(2 occu-
liter) (up
to 2 oc-
plus lug- (up
to 2 oc-
pants plus
cupants) gage) cupants)
luggage)
PSI
ll kPA PSI kPA
PSI JI kPA PSI Jl kPA
-
4-cylin-
der
2.0 225/50
Rl 7 94H All Sea-
son
225/50 R17 94W XL High
Performance
245/45 Rl 7 95H All Sea-
son
245/45 R17 95YXL High
Performance
245/40 R18 93H All Sea­
son
245/40 R18 93V XL High
Performance
255/35 Rl9 96V XL High
Performance
32 220
32 220
32 220
32 220
32 220
32 220
32 220 32
220 29 200 29 200
32 220 29 200 29 200
32 220 29 200 29 200
•
32 220 29 200 29 200
I
32 220 29 200 29 200
•
33 II 230 29
200 30 210 I
32 220 29 200 29 200
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 spore wheel is
l ocated on a label on the drive r's side B-pillar.
Because technical changes may be made to
ve hicl e equ ipment dur ing the model year, a l­
ways compa re the tire size designation on the
tire pressure label on your vehi cle w ith t he
tires on your vehicle . Make sur e that the tire
size information on the vehicle label is the
same as the size of the tires on the vehicle.
This is especially important if the vehicle be­
longs to someone else or you bought the veh i­
cle with different rims/tires or you bought the
vehicle as a previously owned vehicle. Remember, you
r safety and that of your pas­
sengers also depends on making sure that
load 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 veh icle's Gross Vehicle Weight
Rat ing ("GVWR"). The Gross Axle We ight Rat­
ing ("GAWR") is the maximum load that can
be applied at each of the vehicle's two axles .
The Gross Vehicle Weight Rating and the
Gross Axle Weight Rating are listed on the
safety comp liance sticker label lo cated on the
driver's side B-pillar. The tire pressure label on
your A udi lists the maximum combined
weight of all of the occ upants and luggage or
Ill>
•
•

204 Tires and wheels
c::>fig . 148 running across the tread. Depend­
ing on the make, there will be six to eight of
them evenly placed around the tire. Marks on
the tire sidewall (for example "TWI" or other
symbols) indicate the positions of the tread
wear ind icators . Worn tires must be replaced .
Different figures may apply in other countries
c::> ,& .
Tire pressure
Incorrect tire pressure causes premature wear
and can cause sudden tire blow-out . For this
reason, tire pressure must be checked at least
once a month
c::> page 200.
Driving style
Driving fast around curves, heavy acceleration
and hard braking increase tire wear.
Rotating tires for more even wear
For a ll four tires on your vehicle to have the
same service life, we recommend that the
front and rear tires are rotated according to
the tire manufacturer's suggested tire rota­
tion intervals. Please remember the follow­
ing:
- Tire rotation interva ls may differ from the
vehicle serv ice intervals outlined 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 manufacture r's suggested
t ir e rotation intervals .
- Vehicles with front-wheel drive experience
more tread wear on the front wheels com ­
pared to all-wheel drive (quatt ro ® ).
- Please rotate t ires as shown
c::> fig . 149.
-Extra care must be taken when rotating di-
rect ion-specific tires
c::> page 226.
Wheel balancing
The whee ls on new vehicles are balanced.
However, various situations during everyday
driving can cause them to become unbal­
anced, resulting in vibrations you can usually
feel through the steering wheel. Unbalanced
wheels 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 installed.
Incorrect wheel alignment
Incorrect wheel alignment can cause exces­
sive tire wear, impairing the safety of the vehi ­
cle. If tires show excessive wear, have the
whee l alignment checked by an authorized
Audi dealer or qualified workshop.
All Wheel Drive
Vehicles with quattro ® must a lways have tires
of the same size, construction and tread type .
For details see c::>page
154.
A WARNING
-Sudden tire fai lure can lead to loss of con-
trol, a crash and serious personal injury!
- Never drive a vehicle when the tread on
any tire is worn down to the wear indica­
tors.
- Worn tires are a safety hazard, they do not grip well on wet roads and increase
your r isk of "hydroplaning" and loss of
control.
- Always keep chemicals that can cause
tire damage, such as grease, oil, gasoline
and brake fluid away from tires.
- 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 vehicle if
you are not sure of their "previous histo­
ry." O ld used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire fai lure
and loss of vehicle control.

general, the greater the number of plies, the more weight a tire can support . Tire manufac­
turers also must indicate the materials in the
tire, wh ich include steel, nylon, polyester, and
others .
Ma ximum Load R ating
This number indicates the maximum load in
kilograms and pounds that can be carried by
the tire.
Tire qualit y gr ad ing for treadw ear,
tract ion , an d temp erature resis ta nce
Tread wear , traction and temperature grades
c::> pag e208.
M aximum Permis sibl e Inflation Pr essur e
This n umbe r is the greatest amount of air
pressure that should ever be put in the tire
under normal driving conditions .
& WARNING
- Using incorrect or unmatched tires and/
or whee ls or improper tire and whee l
combinations can lead to loss of contro l,
collision and serious personal injury.
- Always use tires, rims and wheel bo lts
that meet the specifications of orig inal
factory-installed tires or other combina­
t ions that have been spec ifically ap­
proved by the vehicle manufacturer .
- Tires age even if they are not be ing used
and can fail suddenly, especially at high
speeds . T ires that are more than 6 years
o ld can only be used in an emergency
and then with special care and at lower
speeds.
- Never mount used ti res on you r vehicle if
yo u are not s ure 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.
- All four wheels must be fitted with radia l
t ires of the same type, size (roll ing cir­
cumference) and the same tread pattern .
Driv ing with different tires reduces veh i-
Tire s an d wheel s 207
cle handling and can lead to a loss of
contro l.
- If the spare tire is not the same as the
tires that are mounted on the vehicle -
for examp le w ith winter t ires -only use
the spare t i re for a short period of time
and drive with extra care . Refit the nor ­
mal road wheel as soon as safely poss i­
ble .
- Never drive faster than the max imum
speed for which the tires on your vehicle
are rated because tires that are dr iven
faster than their rated speed can fa il
suddenly.
- Ove rloading tires cause heat build-up,
sudden tire fa ilure, including a blowout
and sudden deflation and loss of contro l.
- Temperature grades apply to tires tha t
are properly infla ted and not over or un­
derinf lated .
- For technical reasons it is not always
possible to use whee ls from other vehi­
cles -in some cases not even wheels
from the same ve hicle mode l.
-If you install wheel trim discs on the ve ­
hicle wheels, make sure that the air flow
to the brakes is not b locked. Reduced air­
f low to the brakes can them to overheat,
increas ing stopping d istances and caus­
ing a co llision .
- Run flat tires may only be used on vehi­
cles that were equ ipped w ith them at the
factory. The veh icle must have a chassis
des igned for run flat ti res and a factory­
installed t ire p ressure monito ring sys­
tem that indicates a loss of ti re p ressu re.
I nco rrec t use of run fl at tires can lead to
veh icle damage o r accidents. Check with
an authorized Audi dealer or tire special­ ist to see if your vehicle can be equipped
with run flat tires. If run flat tires are used, they must be installed on all four
wheels. Mixing tire types is not permit-
ted .
Ill>
•
•

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 or "snow " tires, those
with ve ry deeply cut tread. These t ires shou ld
only be used in pa irs and be insta lled on all
fou r wheels. Ma ke sure yo u pu rchase snow
tires that are the same size and construction
type as the other tires on your vehicle .
If your vehicle is equipped with all -wheel
d rive*, this wi ll improve tract ion during w inter
driving, even with the standard tires . Howev­
er, we strong ly recommend t hat you always
eq uip a ll four whe els on your v ehicle with cor ­
rectly fitted winter t ires o r all -season tires,
when winter ro ad conditions are expec ted.
T his also improves the vehicle's braking per­
formance and reduces stopping distances .
Summe r tires provide less grip on ice and
snow.
W inter tires (snow tir es) must a lways be fitted
on all four whee ls .
Ask yo ur autho rized Aud i dea ler o r qualified
wo rkshop fo r permi tted
w inter tire siz es . Use
only radia l wi nter tires.
W inte r tir es lose the ir effectiveness when the
tread is worn down to a depth of 0.15 7 inch
(4 mm) .
Only drive with winter tires under winter con­
d it ions . Summer tires hand le better when
there is no snow or ice on the roads and the
temperature is above 45 °F ( 7 °C).
I f you have a flat tire, see notes on spa re
wheel <=?
page 205.
Please always remember that w inter tires may
h ave a lower speed rating than the t ires origi­
na lly installed on your veh icle at the t ime it
was manufactured. Plea se see <=?
page 206,
Speed rating (letter code)
for a List ing of the
speed rat ing letter codes and the maxim um
speed at whic h the tir es can be driven.
Tire s an d wheel s 209
The speed rating letter code (¢ page 196) is
o n the side wall of the tir e<=?
page 205.
A WARNING
Winter t ires have maximum speed limits
that may be lower than your vehicle 's max­
imum speed. Always know the max imum
speed before driv ing off . Never drive faster
than the speed permitted for you r specific
winter tires . This wi ll cause damage to the
tires leadi ng to an accident and ser ious
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 fail ure in­
cluding a blowout and sudden deflation, loss of contro l, crashes and ser ious per­
sonal injuries. Have worn or damaged tires
replaced immediately .
- Wi nter tires have maximum speed rating
that may be lower than your vehicle's
maximum speed .
- Never drive faster than the speed for
which the w inter or othe r tires installed
on you r vehicle a re rated .
A WARNING
Always ad just yo ur dr iv ing to the road and
traffic condit ions . Never let the good ac­
celeration of the winter t ires and al l-wheel
drive tempt yo u into ta king extra risks. Al­
ways remember:
- When braking, an all-wheel drive veh icle
handles in the same way as a front drive
vehicle .
- Drive ca re fully and reduce your speed on
icy and slippery roads, even w inter t ires
cannot help under black ice conditions .
@ For the sake of the environment
Use summer tires when weather condi­
tions permit. They are qu iete r, do not wear
as quickly and reduce fuel consumpt ion .
•
•
-

210 Tir es and whe els
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 0.53 inch
(13.S mm), including the lock .
Remove wheel center covers and tr im discs
before putting snow cha ins on your vehicle
¢ Q) . For safety reasons cover caps must the n
be fitted over the whee l bolts. These are avai l­
ab le from authorized Audi dea lers.
A WARNING
Using the wrong snow chains for yo ur vehi ­
cle or installing them incorrectly can in­
crease the risk of loss of control leading to
ser ious personal inj ury.
- Snow chains are ava ilable in different
sizes. Always make sure to follow the in­
struct ions provided by the snow chain
manufacturer .
- When driving w ith snow chains never
dr ive faster than the speed permitted for
your specific snow cha ins.
- Always observe local regulat ions.
([) Note
-Remove snow chains before driving on
roads not covered with snow to avoid
damaging tires and wear ing the snow
chains down unnecessar ily.
- 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
sa ry. Follow the i nstructions from the
snow cha in manufacture r when doing so.
(D Tips
Where snow chains are mandatory on cer­
tain roads, th is normally a lso applies to ve­
hicles with All Whee l Dr ive.
Wheel bolts
Wheel bolts must always be tightened to the
correct torque.
T he design of wheel bo lts is matched to the
factory installed rims. If different rims are fit­
ted, the correct whee l bolts with the right
l ength and correctly shaped bolt heads must
be used. Th is ensures that wheels are fitted
securely and that the brake system functions correctly.
In certa in circumstances, you may not use
whee l bolts from a different vehicle -even if it
is the same model
¢page 243.
A WARNING
-Imp roperly t ightened or ma inta ined wheel
bo lts can become loose causing loss of
control, a coll is ion and serious pe rsonal in­
jury.
- Always keep t he wheel bo lts and the
threads in the wheel hubs clean so the
wheel bo lts can turn easily and be prop­
erly tightened.
- Never grease or oil the wheel bolts and
the threads in the whee l hubs . They can
become loose while driving if g reased or
oiled, even if tightened to the specified
torque.
- Onl y use whee l bolts that belong to the
rim being installed.
- Never use different wheels bo lts on yo ur
vehicle .
- Always maintain the correct tightening
torque for the whee l bolts to reduce the
risk of a whee l loss. If the tightening tor­
que of the whee l bolts is too low, they
can loosen and come out when the vehi­
cle is mov ing. If the tightening torque is
too high, the wheel bolts a nd threads
II>-

can be damaged and the wheel can be­
come loose.
@ Note
The specified torque fo r the wheel bo lts is
90 ft lb (120 Nm) with a tolerance of± 7,4
ft lb(± 10 Nm). Torque wheel bo lts diago­
nally. After chang ing a wheel, the torque
must be checked as soon as possib le wit h a
torque wrench -preferab ly by an author­
ized Aud i dealer or qualified workshop .
Low aspect ratio tires
Your Audi is factory-equipped with low aspect
ratio t ires. These t ires have been thorough ly
tes ted and been selected spec ifica lly for your
model for the ir superb pe rformance, road feel
and handling under a variety of driving condi­
tions . Ask your a uthorized Audi dea le r for
more deta ils.
The low aspect ratio of these tires is indicated
by a numeral of
55 or le ss in the tire's size
designation. The numeral represents the ratio
of the tire's sidewall height in relat ion to its
tread width expressed in percentage . Conven­
tional tires have a height/width ratio of 60 or more .
The perfo rmance of low -aspect -rat io ti res i s
part icularl y sensit ive to improp er i nflation
pr essu re. It i s th erefore importan t that low
aspect r atio tire s are infla ted to th e specifi ed
pr ess ure and that the inflation pressure is
regu lar ly che cked and maintained. Tir e pr es·
s ur es sh ould b e chec ked at l ea st once a
month and alw ay s before a lon g trip
<=> page 200, Checking tire pressure.
What you can do to avoid tire and rim
damag e
Low aspec t ratio t ires can be damaged more
easi ly by impact with potho les, cu rbs, gu llies
or ridges on the road, part icu larly if the tire is
underinflated .
I n o rder to m inimize the occu rrence o f impact
damage to the t ires of your vehicle, we recom -
Tires an d wheel s 211
mend that you observe the following preca u­
tions:
- Always ma inta in re commended inflation
pressures . Check your tire pressu re eve ry
2,000 miles (3,000 km) and add air if neces ­
sary.
- Drive caref ully 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 also cause damage to your tires .
- After any impact, immediate ly inspect your
tires or have them inspected by the nearest
au thor ized Audi dealer. Replace a damaged
tire as soon as possible .
- Inspect your tires every 2,000 m iles (3,000
km) for damage and wear. Damage is no t al­
ways easy to see . Damage can lead to loss of
air and under inflat ion, which could eventu­
ally cause tire failure .
If you believe that a
tire may have been damaged, rep lace the
tire as soon as possib le .
- These tires may wear more quickly tha n oth­
ers.
- Please also remember that, while these tires
de live r responsive handling, they may ride
less comfo rtably and make more noise than
other choices .
Reduced performanc e in winter /cold
season conditions
A ll ti res are designed for certa in p urposes.
T he low aspect ratio, ult ra h igh performance
tires originally installed on your vehicle are in­
tended for maxim um dry and wet road per­
formance and handling. They are not suitable
for cold , snowy or icy weather condi tions. If
you drive under those circumstances, you
should equ ip your vehicle w ith all-season or
winter tires, which offer bette r traction under
those conditions. We suggest you use the rec­
ommended snow o r all-season t ires specified
f o r yo ur vehicle , or thei r equivalent .
Refer to
<=> page 209 fo r more detailed infor­
mation regard ing winter tires .
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