warning AUDI TT ROADSTER 2018 Owners Manual

Wheels
Wheels
Wheels and T ires
General information
~check your tires regularly for
damage (punctures, cuts, cracks
and bulges). Remove foreign ob ­
jects from the tire tread.
~ If driving over curbs or similar
obstacles, drive slowly and ap­ proach the curb at an angle.
~Have faulty tires or rims re­
placed immediately.
~ Protect your tires from oil,
grease and fuel.
~ Mark tires before removing
them so that the same running
direction can be maintained if
they are reinstalled.
~Lay tires flat when storing and
store them in a cool, dry location
with as little exposure to light as
possible.
_&. WARNING -
-Never drive faster than the maximum permitted speed
for your tires. This could cause
the tires to heat up too much.
This increases the risk of an
accident because it can cause
the tire to burst .
-Always adapt your driving to the road and traffic condi-
244
tions . Drive carefully and re­
duce your speed on icy or slip­
pery roads . Even winter tires
can lose traction on black ice.
(@ Note
-Please note that summer and
winter tires are designed for
the conditions that are typical
i n those seasons . Aud i recom­
mends using winter tires dur­
ing the winter months . Low
temperatures significantly de­
crease the elasticity of summ­
er tires, which affects traction
and braking ability. If summer
tires are used in very cold
temperatures, cracks can form
on the tread bars, resulting in
permanent tire damage that
can cause loud driving noise
and unbalanced tires.
-Burnished, polished or chromed rims must not be used in winter driving condi­
t ions. The surface of the r ims
does not have sufficient corro­
sion protection for this and
could be permanently dam ­
aged by road salt or similar
substances.

0 co .... N
" N .... 0
" "' co
beads are laid at substantially
90 degrees to the centerline of
the tread .
Recommended inflation
pressure
see ¢ page 247, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at h igher in ­
flation pressures than the corre­
sponding standard tire. Rein­
forced tires may be identified as
"XL", "xl", "EXT RA L OAD", or "RF"
on the sidewa ll.
Rim
means a metal support for a tire
or a tire and tube assemb ly upon
which the t ire beads are seated .
Rim diameter
means nominal diameter of the
bead seat . If you change your
whee l size, you will have to pu r­
c h ase new t ires to match the new
rim diameter .
Rim size designation
means rim diamete r and width .
Rim width
means nominal distance between
rim flanges .
Wheels
Sidewall
means that portion of a tire be ­
tween the tread and bead .
Speed rating (letter code)
means the speed at which a tire is
designed to be driven for extend­
ed periods of time. The ra tings
range from
93 mph (150 km/h)
to
186 mph (298 km/h) ¢ table
on page 245 .
You may not find
this informat ion on all tires be ­
cause it is not required by law .
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates t he
maximum pe rmissible roa d
speeds . See also ¢
A in General
information on page 244.
Tire pressure monitoring
system *
means a system that detects
when one or more of a vehicle's
ti res are underinflated and illumi ­
nates a low tire pressure warning
telltale .
Tread
means that portion of a ti re that
comes into contact with the road .
.,.
249

Wheels
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
is the same circumference as the
regular tires.
& WARNING ~ -
-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.
252
-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.
-Only use tires that are more
than six years old when abso­
lutely 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 al­ low enough air circulation to
cool the brake system. If they
do not, this could increase the
risk of an accident.

Wheels
For unidirectional tires, make
sure the tires are installed a ccord­
ing to the running direction indi­
cated on the tire sidewall
¢ page 278.
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, drive slowly and carefully to
the nearest authorized Audi deal­
er or authorized Audi Service Fa­
cility to have the vehicle inspect­
ed.
_& WARNING i-==
Tread that has worn too low or different tread depths on the
tires can reduce dr iving safety.
This can increase the risk of an
accident because it has a nega­
t ive effect on handling, driving
through curves, and braking,
and because it increases the
risk of hydroplaning when driv­
ing through deep puddles.
254
-
Tire pressure
Fig. 189 Driver's side 8-p illar: t ire pres ­
sure label
"'
8 > ...
"'
"' -
a "
fl ( =::~ m:t I =: I :=... I ) (: ::-) ~ Tbe..,_.....,..._....,_..,...,..~----. ... _ ... ........ wia1-.-. ......... *'~""'-,-......., ..... lb-
llN! IIZli COlD 111111! MCSIUM. NU ON(HA)!Q "'"510NOU,....,. AM)O
"'"'" v - KP aPSI
Fig. 190 Tire pr ess u re lab el
i.tE OWNUrS MANUAL fOR ADDmoNA.l INFORMATION VO" l£ M~U'[L DV ,ROPIQETAIRE POUR PLUS Of IIIEr-lSEIG~MCNTS
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
pillar
¢ fig. 189, ¢ fig. 190.
Use the tire pressure specified for
a normal vehicle load when the
vehicle is partially
loaded ¢ table
on page 256.
If driv ing the vehi-
cle when fully loaded, you must increase the tire pressure to the
maximum specified
pressure ¢ A . ..,.

Wheels
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 254, fig. 189.
Make sure that the tire designa­
tion on your tire matches the des-
Model/ Tire designation
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
Engine Normal load Maximum load
(up to 2 people)
front
PSI
TT : 245/45 R17 95Y 32
2.0 l
245/40 R18 93H 32
4-cylinder
245/40 R18 93Y 32
245/35 R19 93Y 35
255/30 R20 92Y 35
A WARNING
Please note the important safe­
ty precautions regarding tire
pressure ¢ page 254 and load
limits¢ page 256.
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
256
kPA
220
220
220
240
240
rear front rear
PSI kPA PSI kPA PSI
29 200 33 230 30
29 200 33 230 30
29 200 33 230 30
32 220 35 240 32
32 220 38 260 32
and sudden deflation that can
cause the vehicle to crash.
kPA
210
210
210
220
220
Your safety and that of your pas­
sengers also depends on making
sure that load limits are not ex­
ceeded. Vehicle load includes 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").
The "GVWR" includes the weight
of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
plus maximum load. The maxi­
mum load includes the number
of .,.

0 co .... N ,.... N .... 0 ,....
"' co
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 vehicle.
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 vehicle is limited.
The more passengers in the vehi­
cle or passengers who are heavier
than the standard weights as­ sumed mean that less weight can
be carried as luggage.
The Gross Vehicle Weight Rating and the Gross Axle Weight Rating
are listed on the safety compli­
ance sticker label located on the
driver's side B-pillar.
A WARNING
-
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per­
sonal injury, and even death .
Wheels
-Carrying more weight than
your vehicle was designed to
carry will prevent the vehicle
from handling properly and
increase the risk of the loss of
vehicle control.
-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 overloaded can fail sud­
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
-A lways make sure that the to­
tal load being transported
does not make the vehicle
heavier than the vehicle's
Gross Vehicle Weight Rating.
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.
~
257

Wheels
Steps for Determining Correct Load Limit
1. Locate the statement "THE
COMBINED WEIGHT OF OCCU­PANTS AND CARGO SHOULD
NEVER EXCEED XXX KG OR XXX
LBS" on your vehicle's placard
(tire inflation pressure label)
c:> page 254 , fig. 189 .
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 passengers
from
"XXX " kilograms or "XXX"
pounds shown on the sticker
c:> page 254 , fig. 189 .
4. The resulting figure equals the
available amount of cargo and
luggage load capacity. For ex­
ample, if the
" XXX" amount
equals 1400 lbs and there will be five 150 lbs passengers in
your vehicle, the amount of available cargo and luggage load capacity is 650 lbs
(1400-750 (5
X 150) = 650 lbs)
5 . Determine the combined
weight of luggage and cargo
being loaded on the vehicle.
That weight may not safely ex­
ceed the available cargo and
258
luggage load capa city cal culat­
ed in Step 4.
6. If your vehicle will be towing a trailer, load from your trailer
will be tran sferred to your ve­
hicle. Con sult thi s manual to
determine how this reduces
the available cargo and lug­
gage load capacity of your vehi ­
c le .
~check the tire sidewall
(c:> page 245 , fig. 187) to deter­
mine the designated load rating
for a spe cifi c tire.
Wheel bolts and rims
Wheel bolts
Wheel bolts mus t be clea n and loose n/tighte n
e asi ly.
Rims
Rims with a bo lted r im ring* o r with bo lted wheel
covers* cons ist of mult iple pieces . These com po­
nen ts were bol ted togethe r using s pec ial bol ts
a nd a s pecial proc edur e. Yo u m ust no t rep air or
d isa sse mble th em
¢ & -
_& WARNING
Wh eel bolts th at are tig hte ned or re paired in­
cor re ctly can be come loose and resu lt in los s
of ve hicle contro l, wh ic h increases the risk of
an accident. For t he cor rec t tighten ing s pec ifi­
cation,
see¢ page 27 8, Finishing.
- Always keep the wheel bolts an d the
threads in the w heel h ub clean an d fre e of
greas e.
- On ly us e whee l bolts tha t fit th e rim.
- Always h ave damage d rims repaire d by an
auth orized Audi dealer or auth orized A udi
S erv ice Facility. Neve r repa ir o r disassemb le
~

Cl 00 .-< N r--­N .-< 0 r--­Vl 00
rims yourself, because this increases the risk
of an accident.
Winter tires
Winter tires significantly improve the vehicle 's
handling when driving in winter conditions. Be­
cause of their construction (width, compound,
tread pattern), summer tires provide less trac­
tion on ice and snow.
.. Use winter tires on all four wheels.
.. Only use winter tires that are approved for your
vehicle .
.. Please note that the maximum permitted
speed may be lower with winter tires
9 .&, in
General information on page 244.
An author­
ized Audi dea ler or authorized Audi Service Fa­
cility can inform you about the maximum per­
mitt ed sp eed for your tires .
.. Check the tire pressure after installing wheels
9page 254.
The effectiveness of winter tires is reduced great­
ly when the tread is worn down to a depth of
0 .1S7 in (4 mm) . The chara cteristics of winter
tires also decrease greatly as the tire ages, re­
gardless of the remaining tread .
@.l For the sake of the environment
Reinstall summer tires at the appropriate
time, because they provide better handling
when roads are free of snow and ice. Summer
tires cause less road noise, tire wear and fuel
consumption.
(D Tips
You can also use all season tires instead of
w inter tires . Please note that in some coun­
tries where w inter tire s are required, only
w int er tires with
the£ symbol may be per­
mitted.
Snow chains
Snow chains not only improve the driving in win­
ter road conditions, but also the braking.
Wheels
.. Only install snow chains on the front wheels.
This applies a lso to vehicles with all wheel
drive* .
.. Check and correct the seating of the snow
chains after driving a few feet, if necessary. Fol­
low the instructions from the manufacturer .
.. Note the maximum speed of 30 mph (SO km/
h) . Note the local regulations .
Use of snow chains is only permitted with certa in
rim/tire comb inat ions due to technical reasons .
Check with an author ized Audi dealer or author­
ized Audi Service Facility to see if you may use
snow chains .
You must remove the snow chains on roads with­
out snow . Otherwise, you could impair driving
ability and damage the tires .
.8, WARNING
Using incorrect snow chains or install ing snow
chains inc orrectly can resu lt in loss of veh icle
control, which increases the risk of an acci­
dent.
(W) Note
- Snow chains can damage the rims/wheel
covers* if the chains come into direct con­
tact with them. Remove the wheel covers*
first. Use coated snow chains.
- Using snow chains that add more than O.S3
in (13,S mm) of height can severe ly damage
the whee l housings and other vehicle com ­
ponents .
(D Tips
When using snow chains, it may be usefu l to
switch on sport mode
~ page 87.
Low-profile tires
App lies to: vehicles wi th low- pro fil e tir es
Compared to other tire/rim combinations, low­
profile tires offer a wider tread surface and a
larger rim diameter with shorter tire sidewalls .
This results in an ag ile driving style . However, it
may reduce the level of comfort and increase
r oad noise when driving on roads in poor condi-
tion.
..,_
259

Wheels
Low -profile tires can become damaged more
quickly than standard tires when driving over large bumps, potholes, manhole covers, and
curbs. Therefore, it is particularly important to
maintain the correct tire pressure
c::;, page 254 .
To reduce the risk of damage to the tires and
rims, drive very carefully on poor roads.
Check your wheels regularly every 2,000 mi (3,000 km) for damage. For example, check for
bu lges/cracks on the tires or deformations/
cracks on the rims.
Afte r a heavy impact or damage, have the tires
and rims inspected or replaced immediate ly by
an authorized Audi dealer or authorized Audi
Service Facility.
L ow -profile tires can wear o ut faster than stand­
ard tires.
Uniform tire quality grading
- Tread wear
- T raction
AA A B C
- T emperature ABC
Qual ity grades can be found where appl icable on
the tire side wall between tread shoulder and
maximum sect ion w idth
c::;, page 245, fig. 187.
For example: Tread wear 200, Traction AA, Tem ­
perature
A .
All passenger car tires must conform to Federal
Safety Requirements in addition to these grades.
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under contro lled conditions on a specified gov ­
ernment test course.
F or examp le, a tire graded
150 would wear one
and one half
(1 1/2) times as well on the govern­
ment course as a tire graded
100.
The relative performance of tires depends upon
the actual conditions of their use, however, and may depart significant ly from the norm due to
variations in driving habits, service practices and differences in road characteristics and climate.
260
Traction
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 un ­
der controlled conditions on specified govern­
ment test surfaces of asphalt and concrete. A tire
marked C may have poor traction performance
c::;, .&. .
Temperature
The temperature grades are A (the highest), B,
and C, representing the tire's resistance to the
generat ion of heat and its ability to dissipate
heat when tested under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the mate­ rial of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden
tire failure
c::;, ,&. .
The grade C corresponds to a level of perform­
ance which all passenger car tires must meet un­
der the Federal Motor Vehicle Safety Standard
No .
109 . Grades Band A represent higher levels
of performance on the laboratory test wheel than
the m inimum required by law.
A WARNING -
The traction grad e assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor­
nering, hydroplaning or peak traction charac­
teristics.
A WARNING
The temperature grade for this tire is estab ­
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla­
tion, or excessive loading, either separately or
in comb inat ion, can cause heat bu ildup and
possible tire failure.
A WARNING
-
-
Temperature grades apply to tires that are
properly inflated a nd not over o r underinflat­
ed.

Wheels
store the pressure again in the Infotainment sys­
tem
i::> page 262 .
mm (Tir e Pr essure Monitoring System) Tire
pressure: malfunction! See owner's manual -
if
mm appears after switching on the ignition or
while driving and then the
[DJ indicator light in
the instrument cluster also starts to blink for
about one minute and then stays on permanen t­
ly, there is a system malfunction. Try to store the
correct tire pressures
<=:> page 262 . If the indica­
tor light does turn off or turns on again after a
short period of time, drive to an authorized Audi
dealer or authorized Aud i Serv ice Facility immedi­
ately to have the malfunction corrected .
_& WARNING
-If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu­
vers. Stop as soon as possible and check the
tires and their pressure.
- The driver is responsible for maintaining the
correct tire pressures. You must check the
tire pressures regularly.
-Under certain conditions (such as a sporty
driving style, winter conditions or unpaved
roads), the pressure monitor indicator may
be delayed .
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents .
(D Tips
- The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function.
- Using snow chains may result in a system
malfunction.
- The tires with the identification
"AO"
¢page 251 have been matched with your
Audi tire pressure monitoring system . Using
these tires is recommended.
262
Storing tire pressures
Applies to: vehicles with Tire P ressure Monitoring System in­
dicator
If the t ire pr essure chang es or a tire is replaced ,
it must be confirmed in the Infotainment sys­
tem.
.,. Make sure before storing that the tire pressures
of all four tires meet the specified values and
a re adapted to the load
<=:>page 253.
.,. Switch the ignition on.
.,. Select in the Infotainment system : the!M ENUI
button > Vehicle > left control button > Service
& checks> Tire pressure monitoring .
(D Tips
Do not store the tire pressures if snow chains
are installed .
Tire pressure monitoring
system
ill General notes
Each tire, including the spare (if provided),
should be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tir e inflation pr essure la­
bel, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
( T PMS) that illuminates a low tire pressure tell­
tale when one or more of you r tires is significant­
ly under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi­
cant ly under-inflated t ire causes the tire to over­
heat and can lead to tire failur e. Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop-
ping ability.
..,.