SUBARU BRZ 2023 Owners Manual

Tire Information
395
Consumer Information and Reporting Safety Defects13
– CONTINUED –
(6) Load Index: A numerical code
which specifies the maximum load a
tire can carry at the speed indicated
by its speed symbol, at maximum
inflation pressure.
For example, “
91” means 1,356 lbs
(615 kg), “90” means 1,323 lbs (600 kg),
“89
” means 1,279 lbs (580 kg)
(7) Speed Rating: An alphabetical
system describing a tire’s capability
to travel at established and prede-
termined speeds.
For example, “
V” means 149 mph
(240 km/h)
▼ Tire Identification Number
(TIN)
Tire Identification Number (TIN) is
marked on the intended outboard
sidewall. The TIN is composed of
four groups. Here is a brief review of
the TIN with a breakdown of its indi-
vidual elements. (1) DOT symbol*
(2) Manufacturer’s Identification
Mark
(3) Tire Size Code
(4) Tire Type Code
(5) Date of Manufacture
The first two figures identify the

week, starting with “
01” to represent
the first full week of the calendar
year; the second two figures repre-
sent the year. For example, 0101
means the 1st week of 2001.
*: The DOT symbol certifies that the
tire conforms to applicable
Federal Motor Vehicle Safety
Standards.
▼ Other markings
The following makings are also
placed on the sidewall.
WARNING
Load indices apply only to the
tire, not to the vehicle. Putting
a load rated tire on any vehicle
does not mean the vehicle can
be loaded up to the tire’s rated
load.
WARNING
 Speed ratings apply only to
the tire, not to the vehicle.
Putting a speed rated tire on
any vehicle does not mean
the vehicle can be operated
at the tire’s rated speed. The speed rating is void if
the tires are worn out,
damaged, repaired,
retreaded, or otherwise
altered from their original
condition. If tires are
repaired, retreaded, or other-
wise altered, they may not be
suitable for original equip-
ment tire designed loads and
speeds.
DOT XX XX XXX XXXX
(2)(1) (3) (4) (5)
BRZ_U.book 395 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
396
▽Maximum permissible infla -
tion pressure
The maximum cold inflation pres-
sure to which this tire may be
inflated. For example, “350 kPa (51
PSI) MAX. PRESS”
▽ Maximum load rating
The load rating at the maximum
permissible weight load for this tire.
For example, “MAX. LOAD 615 kg
(1,356 LBS) @ 350 kPa (51 PSI)
MAX. PRESS.”
▽ Construction type
Applicable construction of this tire.
For example, “TUBELESS STEEL
BELTED RADIAL” ▽
Construction
The generic name of each cord
material used in the plies (both
sidewall and tread area) of this tire.
For example, “PLIES: TREAD 2
STEEL + 2 POLYESTER + 1
NYLON SIDEWALL 2 POLY-
ESTER”
▽Uniform Tire Quality
Grading (UTQG)
For details, refer to
"Uniform Tire
Quality Grading Standards" 
P405.
■Recommended Tire Inflation
Pressure▼ Recommended cold tire infla -
tion pressure
For the recommended cold tire infla-
tion pressure for your vehicle’s tires,
refer to
"Tires" 
P385. ▼
Vehicle placard
The vehicle placard is affixed to the
driver’s side B-pillar.Example:
WARNING
Maximum load rating applies
only to the tire, not to the vehi-
cle. Putting a load rated tire on
any vehicle does not mean the
vehicle can be loaded up to
the tire’s rated load.
B02109
XX
D00155
TIRE
PNEU
FRONT AVANT PXXX/XXRXX XXXKPA, XXPSI
REAR
ARRI¨RE PXXX/XXRXX XXXKPA, XXPSI
TXXX/XXDXX XXXKPA, XXPSI
SPARE
DE SECOURS SIZE
DIMENSIONS COLD TIRE PRESSURE
PRESSION DES
PNEUS  FROID
TIRE AND LOADING INFORMATION
RENSEIGNEMENTS SUR LES PNEUS ET LE CHARGEMENT
SEE OWNERS MANUAL FOR ADDITIONAL
INFORMATION
VOIR LE MANUEL DE LUSAGER
POUR PLUS DE
RENSEIGNEMENTSFRONT
AVANT REAR
ARRI¨RE
SEATING CAPACITY
NOMBRE DE PLACES
TOTAL
XX
X
The combined weight of occupants and cargo should never exceed XXXkg or \
XXXlbs.
Le poids total des occupants et du chargement ne doit jamais dØpasser\
XXXkg ou XXXlb.
BRZ_U.book 396 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
397
Consumer Information and Reporting Safety Defects13
– CONTINUED –
The vehicle placard shows original
tire size, recommended cold tire
inflation pressure on each tire at
maximum loaded vehicle weight,
seating capacity and loading infor-
mation.▼ Adverse safety consequences
of under-inflation
Driving at high speeds with exces-
sively low tire pressures can cause
the tires to flex severely and to
rapidly become hot. A sharp
increase in temperature could
cause tread separation, and failure
of the tire(s). Possible resulting loss
of vehicle control could lead to an
accident.
▼ Measuring and adjusting air
pressure to achieve proper
inflation
Check and, if necessary, adjust the
pressure of each tire (including the
spare) at least once a month and
before any long journey. Check the
tire pressures when the tires are
cold. Use a pressure gauge to adjust the tire pressures to the

specific values. Driving even a short
distance warms up the tires and
increases the tire pressures. Also,
the tire pressures are affected by
the outside temperature. It is best to
check tire pressure outdoors before
driving the vehicle. When a tire
becomes warm, t he air inside it
expands, causing the tire pressure
to increase. Be careful not to
mistakenly release air from a warm
tire to reduce its pressure.
■ Glossary of Tire TerminologyAccessory weight
The combined weight (in excess of
those standard items which may be
replaced) of automatic transmis-
sion, power steering, power brakes,
power windows, power seats, radio,
and heater, to the extent that these
items are available as factory-
installed equipment (whether
installed or not).
 Bead
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
A breakdown of the bond between
components in the bead.
 Bias ply tire
A pneumatic tire in which the ply
cords that extend to the beads are
laid at alternate an gles substantially
less than 90 degrees to the
centerline of the tread.
 Carcass
The tire structure, except tread and
sidewall rubber which, when
inflated, bears the load.
 Chunking
The breaking away of pieces of the
tread or sidewall.
 Cold tire pressure
The pressure in a tire that has been
driven less than 1 mile or has been
standing for three hours or more.
 Cord
The strands forming the plies in the
tire.
BRZ_U.book 397 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
398Cord separation
The parting of cords from adjacent
rubber compounds.
 Cracking
Any parting within the tread,
sidewall, or inner liner of the tire
extending to cord material.
 Curb weight
The weight of a motor vehicle with
standard equipment including the
maximum capacity of fuel, oil and
coolant, and if so equipped, air
conditioning and additional weight
optional engine.
 Extra load tire
A tire designed to operate at higher
loads and higher inflation pressure
than the corresponding standard
tire.
 Groove
The space between two adjacent
tread ribs.
 Innerliner
The layer(s) forming the inside
surface of a tubeless tire that contains the inflating medium within

the tire.
 Innerliner separation
The parting of the innerliner from
cord material in the carcass.
 Intended outboard sidewall
(1) The sidewall that contains a
whitewall, bears white lettering or
bears manufacturer, brand, and/
or model name molding that is
higher or deeper than the same
molding on the other sidewall of
the tire, or
(2) The outward facing sidewall
of an asymmetrical tire that has a
particular side that must always
face outward when mounting on a
vehicle.
 Light truck (LT) tire
A tire designated by its manufac-
turer as primarily intended for use
on lightweight trucks or multipur-
pose passenger vehicles.
 Load rating
The maximum load that a tire is
rated to carry for a given inflation
pressure. 
Maximum inflation pressure
The maximum cold inflation pres-
sure to which a tire may be inflated.
 Maximum load rating
The load rating for a tire at the
maximum permissible inflation pres-
sure for that tire.
 Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
 Maximum permissible inflation
pressure
The maximum cold inflation pres-
sure to which a tire may be inflated.
 Measuring rim
The rim on which a tire is fitted for
physical dimension requirements.
 Normal occupant weight
150 lbs (68 kg) times the number of
occupants specified in the second
column of Table 1 that is appended
to the end of this section.BRZ_U.book 398 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
399
Consumer Information and Reporting Safety Defects13
– CONTINUED –
Occupant distribution
Distribution of occupants in a
vehicle as specified in the third
column of Table 1 that is appended
to the end of this section.
 Open splice
Any parting at any junction of tread,
sidewall, or innerliner that extends
to cord material.
 Outer diameter
The overall diameter of an inflated
new tire.
 Overall width
The linear distance between the
exteriors of the sidewalls of an
inflated tire, including elevations
due to labeling, decorations, or
protective bands or ribs.
 Passenger car tire
A tire intended for use on passenger
cars, multipurpose passenger vehi-
cles, and trucks, that have a gross
vehicle weight rating (GVWR) of
10,000 lbs (4,535 kg) or less. 
Ply
A layer of rubber-coated parallel
cords.
 Ply separation
A parting of rubber compound
between adjacent plies.
 Pneumatic tire
A mechanical device made of
rubber, chemicals, fabric and steel
or other materials, that, when
mounted on an automotive wheel,
provides the traction and contains
the gas or fluid that sustains the
load.
 Production options weight
The combined weight of those
installed regular production options
weighing over 5.1 lbs (2.3 kg) in
excess of those standard items
which they replace, not previously
considered in curb weight or acces-
sory weight, including heavy duty
brakes, ride levelers, roof rack,
heavy duty battery, and special trim. 
Radial ply tire
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 pres-
sure
The cold inflation pressure recom-
mended by a vehicle manufacturer.
 Reinforced tire
A tire designed to operate at higher
loads and at higher inflation pres-
sures than the corresponding stan-
dard tire.
 Rim
A metal support for a tire or a tire
and tube assembly upon which the
tire beads are seated.
 Rim diameter
Nominal diameter of the bead seat.
 Rim size designation
Rim diameter and width.
BRZ_U.book 399 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
400Rim type designation
The industry of manufacturer’s
designation for a rim by style or
code.
 Rim width
Nominal distance between rim
flanges.
 Section width
The linear distance between the
exteriors of the sidewalls of an
inflated tire, excluding elevations
due to labeling, decoration, or
protective bands.
 Sidewall
That portion of a tire between the
tread and bead.
 Sidewall separation
The parting of the rubber compound
from the cord material in the
sidewall.
 Snow tire
A tire that attains a traction index
equal to or greater than 110,
compared to the ASTM E1136-93
Standard Reference Test Tire,
when using the snow traction test as described in ASTM F-1805-00,

Standard Test Method for Single
Wheel Driving Traction in a Straight
Line on Snow-and Ice-Covered
Surfaces, and that is marked with
an Alpine Symbol “ ” on at least
one sidewall.
 Test rim
The rim on which a tire is fitted for
testing, and it may be any rim listed
as appropriate for use with that tire.
 Tread
That portion of a tire that comes into
contact with the road.
 Tread rib
A tread section running
circumferentially around a tire.
 Tread separation
Pulling away of th e tread from the
tire carcass.
 Treadwear indicators (TWI)
The projections within the principal
grooves designed to give a visual
indication of the degrees of wear of
the tread. 
Vehicle capacity weight
The rated cargo and luggage load
plus 150 lbs (68 kg) times the
vehicle’s designated seating
capacity.
 Vehicle maximum load on the
tire
Load on an individual tire that is
determined by distributing to each
axle its share of the maximum
loaded vehicle weight and dividing
by two.
 Vehicle normal load on the tire
Load on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal occu-
pant weight (distributed in accor-
dance with Table 1 that is appended
to the end of this section) and
dividing by 2.
 Wheel-holding fixture
The fixture used to hold the wheel
and tire assembly securely during
testing.BRZ_U.book 400 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
401
– CONTINUED –
Consumer Information and Reporting Safety Defects13
Table 1 ― Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Designated seat-
ing capacity, num- ber of occupants Vehicle normal load,
number of occupants Occupant distribution
in a normally loaded vehicle
2 through 4 22 in front.
5 through 10 32 in front, 1 in second
seat.
11 through 15 52 in front, 1 in second
seat, 1 in third seat, 1 in
fourth seat.
16 through 22 72 in front, 2 in second
seat, 2 in third seat, 1 in
fourth seat.
■
Tire Care – Maintenance and
Safety PracticesCheck on a daily basis that the
tires are free from serious damage,
nails, and stones. At the same time,
check the tires for abnormal wear.
 Inspect the tire tread regularly
and replace the tires before their
tread wear indicators become
visible. When a tire’s tread wear
indicator becomes visible, the tire is
worn beyond the acceptable limit
and must be replaced immediately.
With a tire in this condition, driving
at even low speeds in wet weather
can cause the vehicle to hydro-
plane. Possible resulting loss of
vehicle control can lead to an acci-
dent.
 To maximize the life of each tire
and ensure that the tires wear
uniformly, it is best to rotate the tires
every 6,000 miles (10,000 km). For
information about tire rotation, refer
to
"Rotational Direction of Tires" 
P364.
Replace any damaged or unevenly
worn tire at the time of rotation. After
tire rotation, adjust the tire pres-
BRZ_U.book 401 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
402sures and make sure the wheel nuts
are correctly tightened. For informa-
tion about the tightening torque and
tightening sequence for the wheel
nuts, refer to
"Flat Tires" 
P303.
■Vehicle Load Limit – How to
DetermineThe load capacity of your vehicle is
determined by weight, not by avail-
able cargo space. The load limit of
your vehicle is shown on the vehicle
placard attached to the driver’s side
B-pillar. Locate the statement “
The
combined weight of occupants and cargo
should never exceed XXX kg or XXX lbs
”
on your vehicle’s placard.
The vehicle placard also shows
seating capacity of your vehicle.
The total load capacity includes the
total weight of driver and all passen-
gers and their belongings, any
cargo, any optional equipment such
as a roof rack or bike carrier, etc.
Therefore cargo capacity can be
calculated by the following method. Cargo capacity = Load limit
− (total
weight of occupants + total weight of
optional equipment)
For information about vehicle
loading, refer to
"Loading Your Vehicle"

P297.▼
Calculating total and load
capacities varying seating
configurations
Calculate the available load
capacity as shown in the following
examples: Example 1
Vehicle capacity weight of the

vehicle is 800 lbs (363 kg), which is
indicated on the vehicle placard with
the statement “The combined
weight of occupants and cargo
should never exceed 363 kg or 800
lbs”.
For example, if the vehicle has one
occupant weighing 154 lbs (70 kg)
CAUTION
Your vehicle is neither
designed nor intended to be
used for trailer towing. There-
fore, never tow a trailer with
your vehicle.
D00245
BRZ_U.book 402 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
403
Consumer Information and Reporting Safety Defects13
– CONTINUED –
plus cargo weighing 551 lbs (250
kg).
1. Calculate the total weight.
2. Calculate the available load
capacity by subtracting the total
weight from the vehicle capacity
weight of 800 lbs (363 kg).
3. The result of step 2 shows that a
further 95 lbs (43 kg) of cargo can
be carried.
Example 2For example, if a person weighing
176 lbs (80 kg) now enters the same
vehicle (bringing the number of
occupants to two), the calculations
are as follows:
1. Calculate the total weight. 2. Calculate the available load

capacity.
3. The total weight now exceeds
the capacity weight by 81 lbs (37
kg), so the cargo weight must be
reduced by 81 lbs (37 kg) or more.
Total weight
= 154 lbs (70 kg) + 551 lbs (250 kg)
= 705 lbs (320 kg) (Occupant) (Cargo)Available Load Capacity
= 800 lbs (363 kg) 705 lbs (320 kg)
= 95 lbs (43 kg) (Vehicle
capacity weight) (Total weight)
D00250
Total weight
= 154 lbs (70 kg) + 176 lbs (80 kg)
+ 551 lbs (250 kg)
= 881 lbs (400 kg)(Occupant)
(Cargo)
Available Load Capacity
= 800 lbs (363 kg) 881 lbs (400 kg)
= 81 lbs ( 37 kg)(Vehicle
capacity weight) (Total weight)
BRZ_U.book 403 ページ ２０２２年３月２９日　火曜日　午後３時５９分

Tire Information
404■Determining Compatibility of
Tire and Vehicle Load Capac -
itiesThe sum of four tires’ maximum
load ratings must exceed the
maximum loaded vehicle weight
(“GVWR”). In addition, sum of the
maximum load ratings of two front
tires and of two rear tires must
exceed each axle’s maximum
loaded capacity (“GVWR”). Original
equipment tires are designed to
fulfill those conditions.
The maximum loaded vehicle
weight is referred to Gross Vehicle
Weight Rating (GVWR). And each
axle’s maximum loaded capacity is
referred to Gross Axle Weight
Rating (GAWR). The GVWR and
each axle’s GAWR are shown on
the vehicle certific ation label affixed
to the driver’s door.
The GVWR and front and rear
GAWRs are determined by not only
the maximum load rating of tires but
also loaded capacities of the
vehicle’s suspension, axles and
other parts of the body. Therefore, this means that the

vehicle cannot necessarily be
loaded up to the tire’s maximum
load rating on the tire sidewall.
■ Adverse Safety Conse -
quences of Overloading on
Handling and Stopping and
on TiresOverloading could affect vehicle
handling, stopping distance, vehicle
and tire as shown in the following.
This could lead to an accident and
possibly result in severe personal
injury.
 Vehicle stability will deteriorate.
 Heavy and/or high-mounted
loads could increase the risk of
rollover.
 Stopping distance will increase.
 Brakes could overheat and fail.
 Suspension, bearings, axles and
other parts of the body could break
or experience accelerated wear that
will shorten vehicle life.
 Tires could fail.
 Tread separation could occur. 
Tire could separate from its rim.
■ Steps for Determining
Correct Load Limit1. Locate the statement “The
combined weight of occupants and
cargo should never exceed XXX kg
or XXX lbs.” on your vehicle’s
placard.
2. Determine the combined weight
of the driver and passengers that
will be riding in your vehicle.
3. Subtract the combined weight of
the driver and passengers from
XXX kg or XXX lbs.
4. The resulting figure equals the
available amount of cargo and
luggage load capacity. For
example, if the “
XXX
” amount equals
1,400 lbs (635 kg) and there will be
five 150 lbs (68 kg) passengers in
your vehicle, the amount of avail-
able cargo and luggage load
capacity is 650 lbs (1,400 − 750 (5 ×
150) = 650 lbs).
5. Determine the combined weight
of luggage and cargo being loaded
BRZ_U.book 404 ページ ２０２２年３月２９日　火曜日　午後３時５９分