2011 Lexus IS F tires

520
6-1. Specifications
■DOT quality grades
All passenger vehicle tires must co nform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found where
applicable on the tire sidewall between tread shoulder and maximum
section width.
For example: Treadwear 200 Traction AA Temperature A
■ Treadwear
The treadwear grade is a comparative rating based on the wear rate of
the tire when tested under controll ed conditions on a specified gov-
ernment 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 de pends upon the actual conditions of
their use, however, and may depart significantly from the norm due to varia-
tions in driving habits, service practices and differences in road characteris-
tics 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 condit ions 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 (turning) trac-
tion.

521
6-1. Specifications
6
Vehicle specifications
■Temperature A, B, C
The temperature grades are A (the hi ghest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified 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 fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Mo tor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excess ive loading, either separately or in
combination, can cause heat build up and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer.
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of transmission, 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)

562
Alphabetical index
TiresChains ..................................................... 204
Checking ............................................... 397
If you have a flat tire ...........................477
Inflation pressure............................... 408
Inflation pressure sensor................ 397
Information............................................. 516
Replacing ................................................477
Rotating tires ........................................ 397
Size .............................................................. 511
Snow tires .............................................. 204
Tools ........................................................... 477
Total load capacity ...............................203
Towing Dinghy towing ..................................... 207
Emergency towing ........................... 443
Trailer towing.......................................206
TRAC.......................................................... 187
Traction control ...................................... 187
Transmission shift switches ...... 137, 139
Trip meter ................................................. 146
Trunk Extending trunk space ......................341
Opener ...................................................... 46
Trunk light Trunk light..................................................47
Wattage....................................................512 Turn signal lights
Replacing light bulbs ....................... 435
Switch ........................................................ 143
Wattage ................................................... 512
USB port ....................................... 246, 254
Vanity lights Vanity lights.......................................... 330
Wattage ................................................... 512
Vanity mirrors ........................................ 330
VDIM...........................................................187
Vehicle dynamics integrated management .........................................187
Vehicle identification number.........503
Vehicle stability control .......................187
Voice command switch ..................... 293
VSC .............................................................187
Warning buzzers Brake system ....................................... 453
Open door .......................................... 456
Seat belt reminder ............................ 456
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