2015 SUBARU BRZ wheel

437
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.

439
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

442
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

443
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

486
Alphabetical index
SpeedometerSpeedometer......................... 187
Steering Column lock release................65
Steering wheel Adjustment ..............................65
Storage feature......................... 260
Stuck If your vehicle becomes stuck ................................... 412
Sun visors.................................265
Switch
Driving mode selector switch .................................. 176
Engine switch ................162, 171
Fog light switch ..................... 208
Hazard light switch ................ 360
Hazard warning flasher switch .................................. 360
Ignition switch................162, 171
Light switches........................ 202
“ODO/TRIP” switch ............... 189
Power door lock switch ....................................43
Power window switch ..............70
Transmission shift
switches ......................177, 179
Window lock switch .................70
Wiper and washer switch .................................. 209 Tachometer
Tachometer........................... 187
Tail lights
Switch ................................... 202
Theft deterrent system Alarm....................................... 82
Engine immobilizer system ..... 78
Theft prevention labels ............. 81
Tire inflation pressure ............. 426
Tire information Glossary ................................ 438
Size ....................................... 435
Tire identification number...... 434
Uniform tire quality grading................................ 436
Tires Chains ................................... 231
Checking ............................... 312
Compact spare tire................ 384
If you have a flat tire.............. 384
Inflation pressure .................. 320
Inflation pressure sensor....... 312
Information ............................ 432
Replacing .............................. 384
Rotating tires......................... 312
Size ....................................... 426
Snow tires ............................. 229
Spare tire .............................. 384
Tire pressure monitoring system ................................ 373T

488
Alphabetical index
WasherChecking ............................... 310
Preparing and checking before winter ....................... 229
Switch.................................... 209
Washing and waxing ............... 276
Weight
Cargo capacity ...................... 224
Load limits ............................. 228
Weight ................................... 416
Wheels ...................................... 324
Window glasses ........................70
Window lock switch ...................70
Windows
Power windows .......................70
Rear window defogger .......... 254
Washer.................................. 209
Windshield wipers ................... 209