tire size AUDI A4 2017 Owners Manual

prevent collisions -there is still a risk of ac­
cidents!
- Press the accelerator pedal carefully when
accelerating on smooth, slippery surfaces
such as ice and snow. The drive wheels can spin even when these control systems are
installed and this can affect driving stability
and increase the risk of a coll ision.
Switching on /off
Intelligent Technology
(D Tips
- The ABS and ASR only function correctly
when all four wheels have a sim ilar wear
condition. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems de­
scribed are working.
£SC turns on automatically when you start the engine.
--- --function of the ESC is limited or switched off . The
amount of stabilization control wi ll differ de­
pending on the level.
--~
· :.__r" ,? .:'~~
,; ~ ... ,1
·· ----- ~
Fig. 138 Center co nso le w it h button ~ OFF
The following examples are unusua l situations
where it may make sense to switch sport mode on in order to allow the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Dr iving with snow chains
E SC is designed to function in levels. Depending
on the level that is selected, the stabilization
ESC levels
Sport mode on
Behavior
The ESC and ASR stabiliza-
tion funct ions are limited
~ .&. .
Operation Press the lfl OFFI button
briefly .
Indicator II turns on.
lights
Messages Stabilization control (ESC):
sport. Warning! Reduced
stability
A WARNING
You should only switch sport mode on or
switch ESC/ ASR off if your driving abilities and road conditions permit.
ESC/ASR off Sport mode off or
ESC/ASR on
The stabilization function is The full stabilization func-
no longer available ~.&. . tion of the ESC and ASR is
ESC and ASR are switched available again.
off.
Press and hold the
! fl O FFI Press the lfl OFFI button
button longer than 3 sec- again.
onds.
II and lf'tl•U~ turn on. fl turns off or fl and
lf'tl•l~~ turn off.
Stabilization control (ESC):
Stabilization control
off. Warning! Reduced sta- (ESC): on
bil ity
-The stabilization function is limited when
sport mode is switched on. The driving
wheels could spin and the vehicle could swerve, especially on slick or slippery road
surfaces.
135

Safety belts
General information
Always wear safety belts!
Wearing safety belts correctly saves lives!
This chapter explains why safety belts are neces­
sary, how they work and how to adjust and wear
them correctly. .. Read all the information that follows and heed
all of the instructions and WARNINGS.
A WARNING
Not wearing safety belts or wearing them im­
properly increases the risk of serious personal
injury and death.
- Safety belts are the single most effective
means available to reduce the risk of serious
injury and death in automobile accidents.
For your protection and that of your passen­
gers, always correctly wear safety belts
when the vehicle is moving.
- Pregnant women, injured, o r physically im­
paired persons must also use safety belts.
Like all vehicle occupants, they are more
likely to be seriously injured if they do not
wear safety belts. The best way to protect a
fetus is to protect the mother -throughout
the entire pregnancy.
Number of seats
Your Audi has a total of five seating positions:
two in the front and three in the rear. Each seat­ ing position has a safety belt.
A WARNING
Not wearing safety belts or wearing them im­
properly increases the risk of serious personal
injury and death.
- Never strap more than one person, includ­
ing small children, into any belt.
It is espe­
cially dangerous to place a safety belt over a
;;§ child sitting on your lap.
~ -Never let mo re people ride in the vehicle
:::l than there are safety belts available. 0 0
3 Safety belts
-Be sure everyone riding in the vehicle is
properly restrained with a separate safety
belt or child restraint.
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. 208 Safety belt warn ing light in the instrument clus ·
te r -en larged
Before driving off, always:
.. Fasten your safety belt and make sure you are
wearing it properly.
"' 0 N ... m
.,. Make sure that your passengers also buckle up
and properly wear their safety belts.
.,. Protect children with a child restraint system
appropr iate for the size and age.
The warning light . in the instrument cluster
lights up when the ignit ion is switched on as a re­
minder to fasten the safety belts . In addition,
you w ill hear a warn ing tone for a certain period
of time.
Fasten your safety belt and make sure that your
passengers also properly put on their safety
belts.
A WARNING
-
- Safety belts are the sing le most effective
means available to reduce the risk of serious
injury and death in automobile accidents.
F or your protection and that of your passen­
gers, a lways correctly wear safety belts
when the vehicle is moving .
- Failure to pay attention to the warning light
that comes on could lead to personal injury.
245

Wheels
(D Tires for passenger vehicles
(if applicable)
P indicat es a tire for a passenger
vehicle. T indicates a tire desig­
nated for temporary use.
@ Nominal width
Nominal width of the tire be­
tween the sidewalls in millime­
ters. In general: the larger the
number, the wider the tire.
@ Aspect ratio
Height/width ratio expressed as a
percentage.
@ Tire construction
R indicates a radial tire.
® Rim diameter
Size of the rim diameter in inches.
@ Load index and speed rating
The load index indicates the tire's
load-carrying capacity.
The speed rating indicates the maximum permitted speed
¢ & in
W inter tires on page 332 .
"XTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
is an Extra Load tire.
Speed rat- Maximum permitted speed
ing
p
up to 93 mph (1 50 km/h)
Q up to 99 mph (160 km/h)
318
Speed rat- Maximum permitted speed
Ing R
up to 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up to 118 mph (190 km/h)
u up to 124 mph (200 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)al
z above 149 mph (240 km/h)al
w up to 168 mph (270 km/h)al
y up to 186 mph (300 km/h)al
a) For tires above 149 mph (240 km/h),
tire manufact urers sometimes use the
code "ZR".
(j) US DOT number (TIN) and
manufacture date
The manufacture date is listed on
the tire sidewall (it may only ap­
pear on the inner side of the tire):
DOT ... 2215 ...
means, for example, that the tire
was produced in the 22nd week of
the year 2015.
@ Audi Original Tires
Audi Original Tires with the desig­
nation "AO" or "RO" have been
specifically matched to your Audi.
When u sed correctly, these tires
meet the highest standards for
safety and handling. An author­
ized Audi dealer or authorized
Audi Service Facility will be able
to provide you with more infor­
mation.

Wheel s
Bead separation
means a breakdown of the bond
between components in the bead .
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tire pressure recom­
mended by the vehicle manufac­
turer for a tire of a designated
size that has not been driven for more than a couple of miles (kilo­
meters) at low speeds in the
three hour period before the tire
pressure is measured or adjusted.
Curb weight
means the weight of a motor ve­
hicle with standard equipment in­
cluding the maximum capacity of
fuel, oil, and coolant, air condi­
tioning and additional weight of
optional equipment.
E x tra load tire
means a tire designed to operate
at higher loads and at higher in­
flation pressures than the corre­ sponding standard tire . Extra load
tires may be identified as "XL",
"xl", "EXTRA LOAD", or "RF" on
the sidewal l.
320
Gross Axle Weight Rating
("GAWR ")
means the load-carrying capacity
of a single axle system, measured
at the tire -ground interfaces .
Gross Vehicle Weight Rating
(" GVWR ")
means the maximum total loaded
weight of the vehicle .
Groove
means the space between two ad­
jacent tread ribs .
Load rating (code )
means the maximum load that a
tire is rated to carry for a given in ­
flation pressure. You may not find
this information on all tires be­
cause it is not required by law.
Ma ximum load rating
means the load rating for a tire at
the maximum permissible infla­ tion pressure for that tire.
Ma ximum loaded vehicle
weight
means the sum of :
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options we ight

Wheels
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the t ire beads are seated .
Rim diameter
means nominal diameter of the
bead seat . If you change your
wh eel size, you will have to p ur­
chase new tires to match the new
rim d iameter .
Rim size designation
means rim diameter and w idth.
Rim width
means nomina l distance between
r im flanges .
Sidewall
means that portion of a t ire be­
twee n the tread and bead .
Speed rating (letter code)
means the speed at which a t ire is
designed to be driven for extend­
ed periods of ti me. The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢ table
on page 318 .
You may not find
this information on all tires be­
cause it is not required by law.
The speed rating letter code,
wh ere applicable, is molded on
the tire sidewall and ind icates the
322
maximum permissible road
speeds
¢ A in Winter tires on
page 332 .
Tire pressure monitoring
system
means a system that detects
when one or mo re of a vehicle 's
tires a re underinflated and illumi ­
nates a low tire pressure war ning
telltale .
Tread
means that portion of a tire tha t
comes into contact wi th the road.
Tread separation
means pulling away of the tread
from the tire carcass .
Treadwear indicators (TWI)
means the projections wi thin the
pr inc ipal grooves designed to g ive
a visua l indication of the degrees
of wear of the t read . See
¢ page 326, Treadwear indicator
for mo re information on meas ur­
ing tire wear.
Uniform Tire Quality Grading
is a tire informa tion system devel ­
oped by the Unite d States Nation ­
a l Highway Traffic Safety Admin­
is tration (NHTSA) that is designed
to help buyers make re lat ive
..

Wheels
for the number of seating posi­tions. Refer to the table ¢
table
on page 329
for the number of
people that correspond to the ve­
hicle normal load.
New tires or wheels
Audi recommends having all work on tires or wheels performed by
an authorized Audi dealer or au­
thorized Audi Service Facility.
These facilities have the proper
knowledge and are equipped with
the required tools and replace­ ment parts.
.. New tires do not yet have the
optimum gripping properties.
Drive carefully and at moderate
speeds for the first 350 miles
(500 km) with new tires.
.. use tires of the same construc­
tion, size (rolling circumference)
and as close to the same tread pattern as possible on all four
wheels.
11>D0 not replace tires individually.
At least replace both tires on the
same axle at the same time.
11>Audi recommends that you use
Audi Original Tires. If you would like to use different tires, please
note that the tires may perform
324
differently even if they are the
same size ¢
&.-
.,. 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¢ &,.
If the spare tire is different from
the regular tires installed on the
vehicle - for example, if winter
tires or wide tires are installed -
then only use the spare tire tem­ porarily in case of emergency and
drive carefully while it is in use. It
should be replaced with a regular
tire as soon as possible .
On
all wheel drive vehicles , 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 damaged by
different tire speeds . For this rea­
son, in case of emergency, only
use a spare tire that has 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.
-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.
-If you install wheel covers on
the vehicle, make sure they al­ low enough air circulation to
Wheels
cool the brake system. If they
do not, this could increase the
risk of an accident.
Tire wear/damage
Fig. 254 Tire profile: treadwear indica­
tor
Tire wear
Check the tires regularly for wear.
-Inflation pressure that is too low or high can increase tire wear
considerably.
-Driving quickly 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 quickly. .,..
325

Wheels
-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.
(D Note
Replace lost valve caps to re­
duce the risk of damage to the
tire valves.
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 8-pillar, always follow the specifica­
tion on the 8-pillar label
¢ page 327, fig. 255.
328
(i} For the sake of the environment
-Tire pressure that is too low
increases fuel consumption.
-Fuel consumption may also in­
crease when driving with the
comfort tire pressure is se­
lected .
(D Tips
Audi recommends using the
tire pressure specified for a
normal load
¢ table on
page 329
or for a full load
when the vehicle is partially loaded.
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.

<( a, .... N ,....
N .... 0 0
3 a,
A WARNING ,~
Using incorrect snow chains or insta lling snow
chains incorrectly can result in loss of vehicle
control, which increases the risk of an acc i­
dent.
(D Note
Snow chains can damage the r ims/wheel cov­
ers* if the chains come into d irect contact
w ith them. Remove the wheel covers* before­
hand . Use coated snow chains.
{1) Tips
When using snow cha ins, it may be useful to
sw itch on sport mode
¢page 135.
Low aspect ratio tires
Your Aud i is facto ry-equipped with low aspect ra ­
tio ti res. These t ires have been tho rough ly tested
and been se lected specifically for yo ur model for
their superb per formance, road feel and handling
under a variety of driving conditions. Ask your au­
thorized Audi dealer for more details .
The low aspect ratio of these t ires is indica ted by
a numera l of
55 or les s in the tire's size designa ­
tion. The numeral represents the ratio of the
tire's sidewall height in r elation to its tread width
expressed in percentage. Conventional tires have
a height/w idth rat io of 60 or more.
The performan ce of low-aspect- ratio tire s is par­
ticularl y sensiti ve to improper inf lat ion pres­
sure . It is therefore impo rtant that low aspect
ratio tir e s are infl ated to the specified pressu re
and tha t the inflation pr essure is regularly
checked and maint ained . Tire pre ssure s should
be check ed at lea st once a month and alwa ys
b efore a long trip<=:>
page 32 7.
What you can do to a void tire and rim
damage
L ow aspect rat io tires can be damaged more easi­
l y by impact with potho les, cu rbs, gull ies or
r idges on the road, pa rtic ularly if the tire is un­
derinflated.
Wh eel s
In order to min imize the occurrence o f impact
damage to the tires of your vehicle, we recom­
mend that you observe the following precau ­
t ions:
- Always maintain recommended inflation pres ­
sures . Check your tire pressure every 2,000
m iles (3,000 km) and add air if necessary .
- Drive carefully on roads with potholes, deep
gu llies or ridges . The impact from driving
through or over such obstacles can damage
your tires. Impact with a curb may a lso cause
damage to your tires.
- After any impact, immed iate ly inspect your
tires or have them inspected by the nearest au­
thorized 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 not always
easy to see . Damage can lead to loss of a ir and
underinflation, wh ich could eventually cause
tire fa ilu re . If yo u bel ieve that a tire may have
been damaged, replace the tire as soon as pos­
sible.
= These tires may wear mo re quickly tha n others.
- Please also remember that , while these tires
de live r responsive ha nd ling, they may ride less
comfort ably and make more noise t han other
choices .
Reduced performance in w inter /cold season
conditions
All tires are des igned for certai n pu rposes. The
low aspect ratio, ultra high performance tires
origina lly installed on your vehicle are intended
for maximum dry and wet road performance and handling. They are not suitable for co ld, snowy or
icy weather conditions. If you drive under those
c ircumstances, you should equip your vehicle
with all -season or winter tires, which offer better
tract ion under those conditions . We suggest you
use the recommended s now or a ll-season tires
spe cified for your vehicle, o r their equiva lent.
Refer
to <=:> page 332 for more detailed informa ­
t ion regard ing winter tires.
Uniform tire quality grad ing
- Tread wear
333

Wheels
-Traction AA A BC
- Temperature ABC
Quality grades can be found where applicable on
the tire side wall between tread shoulder and maximum section width
~ page 317, fig. 253.
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 controlled conditions on a specified gov­
ernment test course.
For example, 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 significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate.
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
~ .& .
Temperature
The temperature grades are A (the highest), B,
and C, representing the tire's resistance to the
generation 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 failur e~ ,& .
The grade C corresponds to a level of perform­
ance which all passenger car tires must meet un-
334
der the Federal Motor Vehicle Safety Standa rd
No. 109. Grades Band A represent higher levels
of performance on the laboratory test wheel than
the minimum required by law.
A WARNING
,--
The traction grade 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 combination, can cause heat buildup and
possible tire failure.
A WARNING
Temperature grades apply to tires that are properly inflated and not over or underinflat­
ed.
Tire pressure monitoring indicator
(l) 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 veh icle placard or tire inflation pressure 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
(TPMS) that illuminates a low tire pressure tell­
tale when one or more of your 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
II>-