wheel SUBARU BRZ 2020 Owners Manual

510 6-1. Specifications
BRZ_U■
Tre ad w ea r
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.

512 6-1. Specifications
BRZ_U
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

515
6-1. Specifications
6
Vehicle specifications
BRZ_U
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

516 6-1. Specifications
BRZ_U
*: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
Trea d 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

550 Alphabetical index
BRZ_U
Brightness controlInstrument panel light control .................................201
Care Alcantara
®............................. 342
Alloy wheels .......................... 333
Exterior.................................. 332
Interior ................................... 338
Seatbelts ............................... 339
Cargo capacity ......................... 269
Chains ....................................... 276
Child restraint system
Booster seats, definition ............................. 141
Booster seats, installation ........................... 146
Convertible seats, definition ............................. 141
Convertible seats, installation ........................... 146
Front passenger occupant detection system .................131
Infant seats,
definition ............................. 141
Infant seats, installation ........................... 146
Installing CRS with LATCH anchors .................. 147
Installing CRS with
seatbelts ............................. 149
Installing CRS with top tether straps .................. 152
Child safety Airbag precautions ................ 125
Battery precautions .......367, 479
Child restraint system............ 141
How your child should wear the seatbelt ..................62
Installing child restraints........ 146
Power window lock switch.......74
Power window precautions ...........................77 Removed key battery
precautions ......................... 391
Seat heater precautions ........ 315
Seatbelt guide ......................... 61
Seatbelt precautions ............... 64
Trunk precautions ................... 49
Cleaning Alcantara
®............................. 342
Alloy wheels .......................... 333
Exterior.................................. 332
Interior ................................... 338
Seatbelts ............................... 339
Clock ......................................... 311
Condenser ................................ 362
Console tray ............................. 307
Coolant Capacity ................................ 494
Checking ............................... 360
Cooling system Engine overheating ............... 481
Cruise control .......................... 243
Cup holders .............................. 307
Curtain airbags .......................... 93
Customizable features ............ 518
Daytime running light system .................................... 235
Defogger Outside rear view mirrors ...... 298
Rear window ......................... 298
Side mirror ............................ 298
Dimensions .............................. 488
Dinghy towing .......................... 280
Display Drive information ................... 221
Multi-information display ........................ 210, 218
Trip information ..................... 211
Warning messages ............... 436
Do-it-yourself maintenance .... 351
C
D

554 Alphabetical index
BRZ_U
Rear side marker lightsSwitch.................................... 233
Rear turn signal lights Switch.................................... 195
Rear view camera..................... 248
Rear view mirror Inside rear view mirror.............69
Outside rear view mirrors ........71
Rear window defogger ............ 298
Replacing Fuses .................................... 393
Key battery ............................ 388
Light bulbs............................. 401
Tires ...................................... 453
Reporting safety defects for U.S. owners ...................... 523
REV indicator ........................... 161
Seat heaters..............................314
Seatbelts Adjusting the seatbelt..............60
Automatic Locking Retractor (ALR).....................62
Child restraint system
installation ........................... 146
Cleaning and maintaining the seatbelts ....................... 339
Emergency Locking Retractor (ELR).....................62
How to wear your seatbelt.......60
How your child should
wear the seatbelt ..................62
Pregnant women, proper seatbelt use ...............64
Reminder light ....................... 428
Seatbelt guide .........................61
Seatbelt pretensioners ............61
Seating capacity....................... 273
Seats Adjustment ..............................53
Adjustment precautions...........54
Child seats/child restraint system installation ..............146 Cleaning................................ 338
Head restraint ......................... 58
Properly sitting in the seat....... 91
Seat heaters.......................... 314
Service reminder indicators .............................. 203
Shift lever Automatic transmission......... 185
If the select lever cannot be shifted from P ................ 470
Manual transmission ............. 192
Shift lock system ..................... 470
Side airbags ............................... 93
Side maker lights
Replacing light bulbs ............. 401
Switch ................................... 233
Wattage................................. 500
Side mirror
Adjusting and folding............... 71
Spare tire Inflation pressure .................. 498
Storage location .................... 453
Spark plug ................................ 494
Specifications .......................... 488
Speedometer ............................ 199
Steering Column lock release ............... 67
Steering wheel Adjustment .............................. 67
Meter control switches .......... 219
Storage feature ........................ 304
Stuck
If your vehicle becomes stuck ................................... 484
Sun visors ................................ 309
S

556 Alphabetical index
BRZ_U
Vehicle identification number ................................... 489
Vehicle stability control (VSC) ....................................... 257
Warning buzzers Electric power steering .......... 426
Keyless access with push button start
system ........................438, 442
Seatbelt reminder.................. 428
Warning lights Anti-lock brake system ................................ 426
Automatic headlight leveling system ................... 426
Automatic transmission
fluid temperature
warning light........................ 428
Brake assist system ..............426
Brake system ........................ 424
Charging system ................... 425
Cruise control indicator light....................... 426
Electric power steering system warning light ........... 426
Electronic engine control system ................................ 426
Engine oil pressure ............... 425
High engine coolant temperature ........................ 425
Keyless access with push button start
system ........................438, 442
Low fuel level ........................ 428 Low tire pressure .................. 428
Malfunction indicator
lamp .................................... 426
Master warning light .............. 428
Open door ............................. 428
Pretensioners........................ 426
Seatbelt reminder light ..................................... 428
Slip indicator light.................. 426
SRS airbags.......................... 426
Tire pressure monitoring system ................................ 428
Warning messages .................. 436
Washer Checking ............................... 368
Preparing and checking before winter ....................... 274
Switch ................................... 240
Washing and waxing ............... 332
Weight Cargo capacity ...................... 269
Load limits............................. 273
Weight ................................... 488
Welcome lighting function .................................. 236
Wheels ...................................... 382
Window glasses ........................ 74
Window lock switch................... 74
Windows Power windows ....................... 74
Rear window defogger .......... 298
Washer.................................. 240
Windshield wipers ................... 240
Winter driving tips ................... 274
W