2013 SUBARU BRZ wheel

429
6-1. Specifications
6
Vehicle specifications
Tire size
■Typical tire size informationThe illustration indicates typical
tire size.
Tire use
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 or 3 digits)
Speed symbol
(alphabet with one letter)
■Tire dimensions Section width
Tire height
Wheel diameter

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6-1. Specifications
6
Vehicle specifications
■Treadwear
The treadwear grade is a comparative rating based on the wear
rate of the tire when tested under controlled conditions on a speci-
fied government test course.For example, a tire graded 150 would wear one and a half (1 - 1/2)
times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions
of their use. Performance may differ significantly from the norm due
to variations in driving habits, service practices and differences in
road characteristics and climate.
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C,
and they represent the tire’s ability to stop on wet pavement as
measured under controlled conditions on specified government
test surfaces of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking
(straight ahead) traction tests and does not include cornering (turn-
ing) traction.
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, represent-
ing the tire’s resistance to the generation of heat and its ability to
dissipate heat when tested under controlled conditions on a speci-
fied indoor laboratory test wheel.Sustained high temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive temperature can lead
to sudden tire failure.
Grade C corresponds to a level of performance which all passenger
car tires must meet under the Federal Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher levels of performance on the labo-
ratory test wheel than the minimum required by law.

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6-1. Specifications
6
Vehicle specifications
Tire related termMeaning
Normal occupant
weight 150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distribution Distribution of occupants in a vehicle as speci-
fied in the third column of Table 1
* below
Production options
weight The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride levelers, roof rack, heavy duty
battery, and special trim
Rim A metal support for a tire or a tire and tube
assembly upon which the tire beads are seated
Rim diameter
(Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer’s designation for a
rim by style or code
Rim width Nominal distance between rim flanges
Vehicle capacity
weight (Total load
capacity) The rated cargo and luggage load plus 150 lb.
(68 kg) times the vehicle’s designated seating
capacity
Vehicle maximum load
on the tire The 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

436
6-1. Specifications
Tire related termMeaning
Overall width The linear distance between the exteriors of
the sidewalls of an inflated tire, including eleva-
tions due to labeling, decorations, or protective
bands or ribs
Passenger car tire A tire intended for use on passenger cars, mul-
tipurpose passenger vehicles, and trucks, that
have a gross vehicle weight rating (GVWR) of
10,000 lb. or less.
Ply A layer of rubber-coated parallel cords
Ply separation A parting of rubber compound between adja-
cent plies
Pneumatic tire A mechanical device made of rubber, chemi-
cals, fabric and steel or other materials, that,
when mounted on an automotive wheel, pro-
vides the traction and contains the gas or fluid
that sustains the load
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
Reinforced tire A tire designed to operate at higher loads and
at higher inflation pressures than the corre-
sponding standard tire
Section width The linear distance between the exteriors of
the sidewalls of an inflated tire, excluding ele-
vations due to labeling, decoration, or protec-
tive 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

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6-1. Specifications
6
Vehicle specifications
*:Table 1  Occupant loading and distribution for vehicle normal load
for various designated seating capacities
Tire related termMeaning
Snow tire A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-
1136 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 which
is marked with an Alpine Symbol ( ) on at
least one sidewall
Te s t r i m The rim on which a tire is fitted for testing, and
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 the 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
Wheel-holding fixture The fixture used to hold the wheel and tire
assembly securely during testing

478
Alphabetical index
SeatsAdjustment ..............................51
Adjustment precautions...........52
Child seats/child restraint system installation ..............136
Cleaning ................................ 276
Head restraint..........................56
Properly sitting in the seat.......85
Seat heaters.......................... 266
Service reminder indicators ..............................190
Shift lever
Automatic transmission ......... 172
If the select lever cannot
be shifted from P.................392
Manual transmission ............. 179
Shift lock system ..................... 392
Side airbags................................87
Side maker lights Replacing light bulbs ............. 337
Switch.................................... 200
Wattage.................................421
Side mirror
Adjusting and folding...............67
Keyless access with
push button start system Antenna location .....................25
“Keyless access” entry function .................................23
Starting the engine ................ 160 Spare tire
Inflation pressure .................. 420
Storage location .................... 378
Spark plug ................................ 416
Specifications .......................... 410
Speedometer
Speedometer ........................ 185
Steering
Column lock release ............... 65
Steering wheel Adjustment .............................. 65
Storage feature ........................ 255
Stuck
If your vehicle becomes
stuck ................................... 406
Sun visors ................................ 260
Switch Driving mode selector
switch.................................. 174
Engine switch................ 160, 169
Fog light switch ..................... 206
Hazard light switch ................ 354
Hazard warning flasher switch.................................. 354
Ignition switch ............... 160, 169
Light switches ....................... 200
“ODO/TRIP” switch ............... 187
Power door lock
switch.................................... 43
Power window switch .............. 70
Transmission shift
switches ...................... 175, 177
Window lock switch ................. 70
Wiper and washer switch.................................. 207

480
Alphabetical index
Warning buzzersElectric power steering .......... 365
Seatbelt reminder.................. 367
Warning lights Automatic transmission fluid temperature
warning light........................ 367
Anti-lock brake system ................................ 365
Brake assist system ..............365
Brake system ........................ 364
Charging system ................... 364
Cruise control indicator light....................... 365
Electric power steering system warning light ........... 365
Electronic engine control system ................................ 365
Engine oil pressure ............... 364
Keyless access with push button start
system ........................365, 374
Low fuel level ........................ 367
Low tire pressure................... 367
Malfunction indicator
lamp .................................... 365
Open door ............................. 367
Pretensioners ........................ 365
Seatbelt reminder
light ..................................... 367
Slip indicator light .................. 365
SRS airbags .......................... 365
Tire pressure monitoring
system ................................ 367
Washer Checking ............................... 306
Preparing and checking before winter ....................... 226
Switch.................................... 207
Washing and waxing ............... 272 Weight
Cargo capacity ...................... 221
Load limits............................. 225
Weight ................................... 410
Wheels ...................................... 319
Window glasses ........................ 70
Window lock switch................... 70
Windows Power windows ....................... 70
Rear window defogger .......... 250
Washer.................................. 207
Windshield wipers ................... 207W