Lexus GS350 Owner's Manual page 542

540
8-1. Specifications
Temperature A, B, C
■
The temperature grades are A (the highest), 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 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 laboratory test
wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly inflated and
not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in com-
bination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related term
Cold tire inflation pressure
Maximum inflation pres-
sure
Recommended
pressure
Accessory weight
Curb weight
Maximum loaded vehicle
weight
Normal occupant weight
GS350_300_GS F_OM_OM30G34U_(U)
Tire 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
The maximum cold inflated pressure to which a tire may
be inflated, shown on the sidewall of the tire
inflation Cold tire inflation pressure recommended by a manu-
facturer
The combined weight (in excess of those standard items
which may be replaced) of automatic 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)
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
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
150 lb. (68 kg) times the number of occupants specified
in the second column of Table 1
Meaning
*
that follows