2018 AUDI Q3 tire size

Intelligent Technology
-Press the accelerator pedal carefully when
accelerating on even, slippery surfaces such
as ice and snow. The drive wheels can spin
even when these control systems are instal­
led and this can affect driving stability and
increase the risk of a collision.
{D) Tips
-The ABS and ASR only function correctly
when all four wheels have a similar wear
Switching on/off
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 .
Fig. 96 Center console : OFF~ button
The following examples are unusual situations
where it may make sense to switch offroad mode
on to allow the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Driv ing on rough terrain when much of the car's
we ight is lifted off the wheels (axle artic ula­
tion)
- Dr iv ing downh ill wh ile braking on loose g round
The ESC is designed to function in levels. Depend­
ing on the level selected, the ESC stabilization
function is limited or switched off . The amount of
stabilization control wi ll differ depending on the
level. For your safety, sw
itch the offroad mode off in
advance.
ESC levels
Offroad mode on ESC/ASR off
Offroad mode off or
ESC/ASR on
Behavior
The ESC and ASR stabiliza-
The stabilization function is The
full stabilization func-
tion functions are limited not
available
¢ .&.. ESC and tion of the ESC and ASR is
¢ .&. . ASR are switched off. availab le again.
Operation Press the C; button briefly. Press and hold the C; button Press the C; button again.
longer than three seconds.
Indicator II turns on. II and lfil•U~ turn on. II turns off or II and
lights lfil•l~i turn off.
Messages Stabilization control (ESC):
Stabilization control (ESC): Stabilization control (ESC):
offroad. Warning! Reduced Off
. Warning! Reduced sta-
On
stability bility
90
...

a
co
...... N r--. N
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Tire designations
Fig. 144 Tire designations on the side­
wall
(D Tires for passenger vehicles
(if applicable)
"P" indicates 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 .
Wheels
© 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. Also
see
¢ &. in General information
on page 166.
"EXTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
i s an Extra Load tire.
Speed rat-
Maximum permitted speed
ing
p up to 93 mph (150 km/h)
Q up to 99 mph (160 km/h)
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?)
z above 149 mph (240 km/h)a)
w up to 168 mph (270 km/h)a)
y up to 186 mph (300 km/h)a)
a) For tires above 149 mph (240 km/h),
tire manufacturers sometimes use the
code "ZR".
167

0 C0
-N
" N
-0 g a)
Glossary of tire and loading
terminology
Accessory weight
means the combined we ight (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 in­
stalled or not) .
Aspect ratio
means the ratio of the height to
the width o f the tire in percent .
Numbers of 55 or lower indicate a
low s idewal l for improved steer­
ing response and better overall
handling on dry pavement.
Bead
means the part of the t ire 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 .
Wheels
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tir e pressure recom­
mended by the vehicle manufac ­
tu rer for a tire of a designated
size that has not been driven for
more than a couple of m iles (k ilo­
meters) at low speeds in the
three hour period before the t ire
pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standard equipment in­
cluding the maximum capacity of
f u el, o il, and coolant, a ir cond i­
tioning and additional weight of
optio nal eq uipment .
Extra load tire
means a tire designed to operate
at higher loads and at higher in­
flat ion pressu res than the corre­
sponding standard tire . Extra load
tires may be ident ified as "X L",
"xl", "EXTRA LOAD", or "RF" on
the sidewall. .,.
169

0 C0
-N ,... N
-0
0
::, a)
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
cluding 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.
Re commended inflation
pressure
see ¢ page 169, 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" "EXTRA LOAD" or "RF" 1 , ,
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 diamet er
means nominal d iameter of the
bead seat. If you change your
wheel size, you will have to pur­
chase new tires to match the new
rim diameter.
Rim size designat ion
means rim diameter and width .
Rim width
means nominal distance between
r im
flanges .
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 rat ings
range from
93 mph (150 km/h)
to
186 mph (298 km/h) ¢ table
on page 167.
You may not find
this information 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 the ...
17 1

0 C0
-N
" N
-0
0
::, a)
by the tire manufacturer. This in­
formation is used to contact con­
sumers if a tire defect requires a
recall.
Ve hicle capacity weight
means the rated cargo and lug­
gage load plus 150 lbs. (68 k ilo ­
grams) times the vehicle's desig­
nated seating capacity.
Vehicle ma ximum load on the
tire
means that load on an individual
tire that is determined by distrib­
uting to each axle its share of the
maximum loaded vehicle weight
and dividing by two.
Vehicle normal load on the tire
means that load on an individual
tire that is determined by distrib­
uting to each axle its share of the
curb weight, accessory weight,
and normal occupant weight (dis­
tributed in accordance with¢
ta­
ble on page
178) and dividing by
two.
Occupant loading and distr i­
bution for vehicle normal load
for various design ated seating
capacities
Refer to the tire inflation pres­
sure label¢
page 176, fig. 147
Wheels
for the number of seating posi­
tions . Refer to the table ¢
table
on page
178 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 gripp ing properties .
Drive carefully and at moderate
speeds for the first 350 miles (500 km) with new tires.
.,,. Only use tires with the same de­
sign, size (rolling circumference)
and as close to the same tread
pattern as possible on all four
wheels.
.,,. Do not replace tires individually .
At least replace both tires on the
same axle at the same time.
.,,. Audi recommends that you use
Audi Original Tires . If you would
like to use different tires, please note that the tires may perform ...
173

Wheels
differently even if they are the
same size
c::> .,&..
~ 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
c::> ,& .
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.
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 has the same circumference as
the regular tires.
174
A 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.
-Do not use run-flat tires on
your vehicle. Using them when ...

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 176, fig. 146.
Make sure that the tire designa­
tion on your tire matches the des-
Model/ Tire designation
Engine
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
Normal load Maximum load
(up to 3 people)a)
front rear front rear
PSI
Q3: 235/50 Rl8 97H 32
2.0L
235/50 Rl8 97V 32
4 cylinders 255/40 Rl9 l00Y 33
255/35 R20 97Y 33
255/40 Rl9 l00H 33
a) 2 peop le in the front ; 1 perso n in the rear
.8, WARNING
Please note the important safe­
ty precautions regarding tire
pressure ¢
page 176 and load
limits ¢
page 178.
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
178
kPA PSI kPA PSI kPA PSI kPA
220 32 220 33 230 36 250
220 3 2 22 0
33 230
36 250
230 33 230 44
300 46 320
230 33 230 44 300 4
6 320
230 33 230 44 300 46 320
tire failure, including a blowout
and sudden deflation that can
cause the vehicle to crash.
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
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