2018 AUDI S3 SEDAN tire pressure

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Glossary of tire and loading
terminology
Accessory weight
means the combined weight ( in
excess of those standard items
which may be replaced) of auto­ matic transmission , power steer ­
ing, power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items a re available as factory- in­
stalled equipment (whether i n­
stalled or not) .
Aspect ratio
means the ratio of the height to
the width of the tire in percent .
Numbers of 55 or lower indicate a
low s idewall for improved steer­
ing response and better overall
handling on dry pavement.
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim .
Bead separation
means a breakdown of the bond
between components in the bead .
Wheel s
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 eq uipm ent .
Extra load tire
means a tire designed to operate
at higher loads and at highe r in­
flation pressures than the corre­
sponding standard tire . Extra load
tires may be identified as "X L",
"xl", "EXTRA LOAD", or "RF" on
the sidewall.
.,.
333

Wheel s
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 .
Max imum 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 weight
33 4
Maximum (permissible)
inflation pressu re
means the maximum cold infla ­
tion pressure to which a t ire may
be inflated. A lso called "maxi­
mum inflat ion pressure."
Normal occupant weight
means 150 lbs. (68 kilograms)
times the number of occupants seated in the vehicle up to the to­
tal seating capacity of your vehi­
cle.
Occupant distribution
means distribution of occupants
in a vehicle.
Outer diameter
means the overall diameter of an
inflated new tire.
Overall width
means the linear distance be­
tween the exteriors o f the side­
walls of an inflated tire , includ ing
elevations due to labeling, deco­ rations, or protective bands or
ribs .
Ply
means a layer of rubber-coated
parallel cords .

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Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs.
(2.3 kg) in excess of those stand­
ard items which they replace, not
previously considered in curb
weight or accessory we ight, in­
c luding heavy duty brakes, ride
levelers, roof rack, heavy duty
battery, and special trim .
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the beads are laid at substantially
90 degrees to the centerline of
the tread.
Recommended inflation
pressure
see ¢ page 333, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at h igher in ­
flat ion pressures than the corre­
sponding standard tire. Rein­
forced t ires may be identified as
"XL " "xl" "EXT RA LOA D" or "RF" , , ,
on the sidewall.
Wheels
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated .
Rim diameter
means nominal diameter of the
bead seat. If you change your
whee l size, you will have to pur ­
chase new tires to match the new
rim diameter .
Rim size designation
means rim diameter and width .
Rim width
means nominal distance between
rim flanges .
Sidewall
means that portion of a ti re 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 rat ings
range from
93 mph (150 km/h)
to
186 mph (298 km/h) ¢ table
on page 331.
You may no t find
this info rmat ion on all tires be­
cause it is not required by law.
T he speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates t he
11>
335

Wheels
maximum permissible road
speeds . See also ¢
A in General
information on page 330 .
Tire pressure monitoring
system *
means a system that detects
when one or more of a vehicle's
tires are underinflated and illumi­
nates a low tire pressure warning
telltale .
Tread
means that portion of a tire that
comes into co ntact with the road.
Tread separat ion
means pulling away of the tread
from the tire carcass.
Treadwear indicators (TWI)
means the projections within the
pr incipal grooves designed to g ive
a vis ual indication of the degrees
of wear of the tread . See
¢ page 339, Treadwear indicator
for more information on measu r­
ing tire wear.
Uniform Tire Quality Grading
is a tire information system devel ­
oped by the United States Nat ion­
a l Highway Traffic Safety Admin­
istration ( NHTSA) tha t is designed
to he lp buyers make relative com-
33 6
parisons among tires . The UTQG
is not a safety rat ing and not a
guarantee that a tire will last for
a prescribed number of miles (kilo meters) or perform in acer ­
t ain way . It simply g ives tire buy ­
ers add itiona l information to
combine with other considera ­
tions , such as price, brand loyalty
and dealer recommendations. U n­
de r UT QG, tires a re graded by the
tire manufacturers in three areas: treadwear, tract ion, and tempera ­
ture res istance. The UTQG info r­
mation on the tires , molded into
the si dewalls .
U.S. DOT Tire Identification
Number (TIN)
This is the tire's "serial number".
It beg ins with the letters
"DO T"
and indicates that the tire meets
all federal s tandards. The next
two numbers or le tters indicate
the plant whe re it was ma nufac ­
tured, and t he last four num bers
represent the week and year of
manufacture. Fo r example,
DOT ... 2217 .. .
means that the tire was produced
in the 22nd week o f 2017. The
other numbers are ma rketing co­
des that may or may not be used
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-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.
Tire wear/damage
Fig. 276 T ire profile : treadwear indica­
tor
Tire wear
Check the tires regular ly 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.
l ) Obey any applicable regulations in your
country.
Wheels
-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.
Treadwear indicator
Original equipment tires contain
treadwear indicators in the tread
pattern, which are bars that are 1/16 in (1.6 mm) high and are
spaced evenly around the tire per­ pendicular to the running direc­
tion
c::> fig. 2 76. The letters "TWI"
or triangles on the tire sidewall indicate the location of the tread­
wear indicators.
The tires have reached the mini ­
mum tread depth
l) when they
have worn down to the treadwear
indicators. Replace the tires with
new ones
c::> .&.-
Tire rotation
Applies to: RS models: tires may
only be rotated if the tires on the
..,.
339

Tire pressure
Fig. 277 Driver's side B-pillar: tire pres­
sure label
"' -,------------~ ,::
9c:==. ~: I :.:: I :.. I ) @ l8 n. _____________ ....., _ _. . ... _ ..
vi ................ ~--"""""' ..... .... ..
TR IIZl 00lO '1111. NaSIUl'll ,,._U DNlNIIONS .......,,.DUftillUSAAIOIJ
-KPA. -PSI
Fig. 278 Tire pressure label
The correct tire pressure for tires
mounted in the factory and for
the spare tire* is indicated on a la­ bel. The label is located on the
8-
pi llar ¢ fig. 2 77, ¢ fig. 2 78. The
location may vary depending on
the model.
Use the tire pressure specified for
a normal vehicle load when the
vehicle is partially loaded
¢ table
on page 342.
If driving the vehi­
cle when fully loaded, you must
increase the tire pressure to the
~ maximum specified pressure ¢,&. .
N
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Checking/correcting tire
pressure
Wheels
11>(heck the tire pressure at least
once per month and also check it
before every long drive.
11>Always check the tire pressure
when the tires are
cold. Do not
reduce the pressure if it increas­
es when the tires are warm.
11>(heck the label¢ fig. 2 78 for
the correct tire pressure based on vehicle load.
11>(orrect the tire pressure if nec­
essary.
11>Store the new tire pressure in
the Infotainment system
¢ page 349 or ¢page 352.
11>(heck the pressure in the emer­
gency tire* /spare tire*. Always
maintain the maximum temper­
ature that is specified for the
tire.
A WARNING
Always adapt the tire pressure
to your driving style and vehicle load.
-Overloading can lead to loss of vehicle control and increase
the risk of an accident. Read and follow the important safe­
ty precautions
inc:::> page 343,
Tires and vehicle load limits.
341

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
Tire pressure table
Please note that the information
contained in the following table
was correct at the time of print­
ing, and the information is sub­
ject to change. If there are differ­
ences between this information
and the tire pressures specified
on the label on the driver's side B­
pillar, always follow the specifica­
tion on the B-pillar label
c> page 341 , fig. 2 77.
Model/ Tire designation
negative effect on driving and
braking behavior, which in­
creases the risk of an accident.
@ Note
Replace lost valve caps to re­
duce the risk of damage to the
tire valves.
@ For the sake of the environment
Tire pressure that is too low in­ creases fuel consumption.
Make sure that the tire designa­
tion on your tire matches the des­
ignation on the tire pressure label
and the tire pressure table.
The following table lists recom­ mended tire pressures in cold
tires according to the load and
the size of the tires installed.
Tire pressure
Engine Normal load Maximum load
(up to 2/3*
people)al
front rear front rear
PSI kPA PSI kPA PSI kPA PSI kPA
A3 sedan: 225/40 R18 92Y 35 240 32 220 36 250 36 250
2.0 L
225/45 R17 91H 33 230 30 210 41 280 41
280
4-cylinder
225/40 R18 92H 36 250 33 230 41
280 41 280
235/35 R19 91 Y 33 230 30 210 38 260 41 280
342

u. 00 .-<
Wheels
Model/ Tire designation Tire pressure
Engine Normal load Maximum load
(up to 2/3*
people)a>
front rear front rear
PSI kPA PSI kPA PSI kPA PSI kPA
S3 sedan: 225/40 Rl8 92Y
38 260 35 240 42 290 42 290
2.0 L
225/40 Rl8 92H 38 260 35 240 41
280 41
280
4-cylinder
235/35 Rl9 91 Y 39 270 36 250 44 300 44 300
RS 3 Sedan: 235/35 Rl9 91 Y 39/ 270/ 35/ 240/ 44/ 300/ 39/ 270/
2.5 L 44b) 300b) 39b) 270b ) 45b) 320b) 44b) 300b)
5-cylinder
255/30 Rl9 91 Y 39/ 270/ --44/ 300/ --
44b) 3oob> 45b) 320 b)
A3 Cabriolet: 225/40 Rl8 92Y 35 240 32 220 38 260 38 260
2.0 L
225/45 Rl7 91H 33 230 30 210 39 270
39 270
4-cylinder
225/40 Rl8 92H 38 260 35 240 41 280 41 280
235/35 Rl9 91 Y 42
290 39 270
45
310 45
310
A3 Sportback 205/55 Rl6 91 V 35 240 35 240 36 250 39 270
e-tron:
225/40 Rl8 92Y 33 230 33 230 36 250 39 270
1.4 l 225/45 Rl7 91H 33
230 33 230 38 260 38 260
4-cylinder
225/40 Rl8 92H
36 250 36 250 41
280 41
280
a) Vehicles with 4 seating positions: two people in the front, Vehicles with S seating
positions:
two peop le in the front, one person in the rear
b) The value before the forward slash applies to vehicles with a maximum speed up to
155 mph (250 km/h) ; the value after
the· slash is for up to 174 mph (280 km/h).
A WARNING
Please note the important safe­
ty precautions regarding tire
pressure
c:::> page 341 and load
Lim its
c:::> page 343.
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 loss of vehicle control, but can al­
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout
and sudden deflation that can
cause the vehicle to crash.
~ well and is more difficult to stop. 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
.-<
~ Overloading can not only lead to
00
technically referred to as the ..,
343