climate control TOYOTA MIRAI 2020 Warranties & Maintenance Guides (in English)

BRIDGESTONE / FIRESTONE
59
tire graded 100. The relative performance of tires depends upon the
actual conditions of their use, however, and may depart significantly
from the norm due to variation in driving habits, service practices and \
differences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are AA, A, B, and C.
Those grades represent the tire’s ability to stop on wet pavement
as measured under controlled conditions on specified government
test surfaces of asphalt and concrete. Warning: The traction grade
assigned to a tire is based on straight-ahead braking traction tests, and
does not include acceleration, cornering, hydroplaning, or peak traction\

characteristics.
Temperature
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. The 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
grade is established for a tire that is properly inflated and not over-
loaded. Excessive speed, underinflation, or excessive loading, either
separately or in combination, can cause heat buildup and a possible
tire failure.

FALKEN
79
like curbs. Your vehicle’s wheels are susceptible to these same
dangers as well. Some vehicles may be originally equipped with high
performance tires that are designed for warmer weather use reducing
traction in colder, winter weather conditions. High performance tires
also pose the possibility of wearing more quickly, giving a stiffer ride,
and producing louder noise than standard all-season tires during
operation. Refer to your vehicle owner’s manual, tire information
placard, or qualified tire service professional for more information about
these kinds of tires.
Winter Tires
Falken recommends all four tires be replaced when replacing your
original equipment tires and installing winter tires for the winter mont\
hs.
SAFETY WARNING
Never use just two winter tires. It could lead to adverse handling, loss
of control, which could cause serious injury or death.
Storing Your Tires
When storing your tires for any extended period of time, be sure to
thoroughly clean your tires with a tire brush, soap, and water to remove\

any dirt, salt, and brake dust from the tires. If you are storing your
tires still mounted on the wheels, use a wheel brush and approved
wheel cleaner to clean your wheels. Then dry the wheels and tires
with a towel and allow them to fully dry. DO NOT apply any tire
dressings while storing your tires. Tire compounds are made to resist
weather cracking and ozone damage. Place each clean and dry tire
in an airtight plastic bag and seal the bag with tape to help reduce oil\

evaporation. Store your tires out of direct sunlight and somewhere that \
is well shielded from the elements, like a climate-controlled room or
dry basement. Storing the tires in a garage or shed usually exposes
the tires to a wide range of temperatures as well as precipitation and
humidity. Keep the tires away from sources that emit ozone like electric
motors that use contact brushes, furnaces, sump pumps, etc. Although
tires will still age regardless of how they are stored, these precaution\
s
will help slow the aging process and reduce the damage to your tires.

FALKEN
86
Uniform Tire Quality Grading System (UTQG)
The Uniform Tire Quality Grading Standards (UTQG) were created to
help you make an informed decision when purchasing passenger car
tires by providing relative information about a tire’s tread wear, traction,
and temperature characteristics. Here is a breakdown of the different
categories that the UTQG grades:
Tread Wear
The tread wear grade is a comparative rating based on the wear rate
of the tire when tested under controlled conditions on a specified
government test course. For example, a tire graded 150 would wear
one and a half (1½) 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, however, and may depart significantly from
the norm due to variations in driving habits, service practices, and
differences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are AA, A, B and C.
Those grades represent the tire’s ability to stop on wet pavement as
measured under controlled conditions on specific government test
surfaces of asphalt and concrete. A tire marked C may have poor
traction performance. WARNING: The traction grades assigned to
this tire is based on straight ahead braking traction tests, and does
not include acceleration, cornering, hydroplaning, or peak traction
characteristics.
Temperature
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 or on a specified indoor
laboratory test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce in tire life, and excessiv\
e
temperature can lead to sudden tire failure. The 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 minimum required by law. WARNING: The temperature

NITTO TIRE
184
• Treadwear - The treadwear grade is a comparative rating based
on the wear rate of the tire tested under controlled conditions on
a specified government test track. For example, a tire graded
200 would wear twice as long on the government course as a
tire graded 100. It is wrong to link treadwear grades with your
projected tire mileage. The relative performance of the tires
depends upon the actual conditions of their use and may vary
due to driving habits, service practices, differences in road
characteristics, and climate.
•
Traction - 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.
• Temperature - 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
temperatures can cause the materials of the tire to degenerate and
reduce tire life, and excessive temperature can lead to sudden tire
failure. The grade C corresponds to a level of performance that all
passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 139. Grades B and A represent higher levels
of performance on the laboratory test wheel than the minimum
required by law.

TOYO TIRE
243
UNIFORM TIRE QUALITY GRADING (UTQG)
The Uniform Tire Quality Grading (“UTQG”) standards are intended to
assist you in making an informed choice in your purchase of passenger
car tires by providing information indicating relative performance in th\
e
areas of treadwear, wet stopping traction, and temperature resistance.
All passenger car tires must conform to federal safety requirements in
addition to these grades.•
Treadwear - The treadwear grade is a comparative rating based
on the wear rate of the tire tested under controlled conditions on
a specified government test track. For example, a tire graded
200 would wear twice as long on the government course as a
tire graded 100. It is wrong to link treadwear grades with your
projected tire mileage. The relative performance of the tires
depends upon the actual conditions of their use and may vary
due to driving habits, service practices, differences in road
characteristics, and climate.
•
Traction - 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.
• Temperature - 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
temperatures can cause the materials of the tire to degenerate and
reduce tire life, and excessive temperature can lead to sudden tire
failure. The grade C corresponds to a level of performance that all
passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 139. Grades B and A represent higher levels
of performance on the laboratory test wheel than the minimum
required by law.