2018 AUDI Q7 flat tire

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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 uipment .
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>
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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 meas ur­
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 (N HTSA) that 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 i n acer­
tain way . It simply g ives ti re buy ­
ers add itiona l information to
combine with other considera ­
tions, such as price, brand loyalty
and dealer recommendations. Un­
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 sidewalls .
U.S. DOT Tire Identification
Number (TIN}
This is the tire's "serial number" .
It beg ins with the letters "DOT"
and indicates that the tire meets
all federal s tandards. The next
two numbers or le tters indicate
the plant whe re it was manufac ­
tured, and t he last four num bers
represent the week and year of
manufac ture. Fo r example,
DOT ... 2217 ...
means that the tire was produced
in the 22nd week of 2017. The
other num bers are ma rketing co­
des that may or may not be used
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by the tire manufacturer. This in­
formation is used to contact con­ sumers if a tire defect requires a
recall.
Vehicle capacity weight
means the rated cargo and lug­
gage load plus 150 lbs . (68 kilo­
grams) times the vehicle's desig­
nated seating capacity.
Vehicle ma ximum load on the
tire
means that load on an indiv idual
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 indiv idual
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 342)
and dividing by
two .
Occupant loading and distr i­
bution for vehicle normal load
for various designated seating
capacities
Refer to the tire inflation pres­
s u re label
¢page 340, fig . 272
Wheels
for the n umber of seating posi­
tions . Refer to the table ¢
table
on page 34 2
for the number of
people tha t correspond to the ve­
hicle normal load.
New tires or wheels
Audi recommends having all work
on tires o r wheels performed by
an authorized Audi dealer or au­
thorized Audi Service Facility.
These facilities have the proper
knowle dge and are eq uipped with
the requ ired too ls and replace­
ment parts.
.,. New tires do not yet have the
optimum g ripping properties .
Drive carefully and at mode rate
speeds for the first 350 miles
(500 km) with new tires.
.,. Only use tires with the same de­
s ign , size (rolling circumfer­
ence), and as close to the same
tread pattern as possible on all
four whee ls .
.,. Do not replace tires indiv idually .
At least replace both tires on the
same ax le at the same time .
.,. Audi recommends that you use
A udi Original Tires . If you would
like to use different tires , please
note that the tires may perform ...
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Wheels
differently even if they are the
same size
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.,,. 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
i=:> ,&. .
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.
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 is the same
circumference as the regular
tires.
A WAR NING ~ -
-Do not use steel rims that are
17 inches or larger. Other-
338
wise, damage to the vehicle
and an accident could result .
-Only use tire/rim combina­
tions and su itable 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 ti res from
the same vehicle model.
-Make sure that the tires you
select have enough clearance
to the vehicle . Replacement
tires should not be c hosen
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.
- Run-flat tires* may only be
used on vehicles that were
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equipped with them at the
factory
r=> page 349.
-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. 270 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-
"
8 l) Obey any applicable regulations in your
0 ~ country.
Wheels
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 ¢
fig. 2 70. 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¢ &.-
Tire rotation
Rotating the tires regularly is rec­
ommended to ensure the tires
wear evenly. To rotate the tires, install the tires from the rear axle ..,.
339

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& WARNIN G
Please note the important safe­
ty precautions regarding tire
pressure
c:::> page 340 and load
limits
c:::>poge 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
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
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 . Veh icle 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
Wheels
plus maximum load . The maxi­
mum load includes the number of
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 . If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­ ed as part of the vehicle load .
The
Gross A xle Weight Rating
(" GAWR ") is the maximum load
that can be applied at each of the
vehicle's two axles.
T he 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 (including
the weight of a trailer hitch and
the tongue weight of the loaded
trai ler) is lim ited. The more pas­
sengers in the vehicle or passen ­
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as luggage.
The Gross Vehicle Weight Rating and the Gross Axle Weight Rating .,.
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