TOYOTA YARIS 2019 Owners Manual (in English)

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YARIS SEDAN_OM_OM99S50z_(U)
7-6. Uniform Tire Quality Grading System (UTQGS)
7
Customer Information and Reporting Safety Defects
Unifor m Tire Quality Grading System
(UTQGS)
This information relates to the tire grading system developed b y the
U.S. National Highway Traffic Saf ety Administration for grading tires
by tread wear, traction, and temperature performance.
The tread wear grade is a comparative rating based on the wear rate
of the tire when tested under con trolled conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one-and-a-half times as
well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual condi tions
of their use, however, and may depart significantly from the no rm
because of variations in driving habits, service practices and differ-
ences in road characteristics and climate.
The traction grades, from highest to lowest, are AA, A, B, and C.
These grades represent the tire’s ability to stop on wet paveme nt as
measured under controlled conditio ns on specified government test
surfaces of asphalt and concrete. A tire marked C may have poor
traction performance.
Tread Wear
Traction-AA, A, B, C
WARNING
The traction grade assigned to this tire is based on braking (s traight
ahead) traction tests and does not include acceleration corneri ng (turn-
ing), hydroplaning, or peak traction characteristics.

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YARIS SEDAN_OM_OM99S50z_(U)
7-6. Uniform Tire Quality Grading System (UTQGS)
The temperature grades A (the highest), B, and C, represent the tire’s
resistance to the generation of heat and its ability to dissipa te heat
when tested under controlled conditions on a specified indoor l abora-
tory test wheel.
Sustained high temperature can cause the material of the tire t o
degenerate and reduce tire life, and excessive temperatures can lead
to sudden tire failure.
Grade C corresponds to a level of performance which all passenger
vehicle tires must meet under the Federal Motor Vehicle Safety Stan-
dard No. 109. Grades B and A represent higher levels of perform ance
on the laboratory test wheel than the minimum r equired by law.
These grades will be added to t he sidewalls of passenger vehicl e tires
over the next several years according to a schedule established by
the NHTSA and the tire manufacturers.
The grade of tires available as standard or optional equipment on Toy-
ota vehicles may vary with respect to grade.
ALL PASSENGER VEHICLE TIRES MUST CONFORM TO THESE
GRADES AND TO ALL OTHER FEDERAL TIRE-SAFETY REQUIRE-
MENTS.
Temperature-A, B, C
WARNING
■Keep your vehicle’s tires properl y inflated and not overloaded
Driving with improperly inflated or overloaded tires is dangero us. Exces-
sive speed, underinflation, or excessive loading, either separa tely or in
combination, can cause heat buildup and possible tire failure. The tem-
perature grade for this tire is established for a tire that is properly
inflated and not overloaded.

YARIS SEDAN_OM_OM99S50z_(U)
5537-6. Uniform Tire Quality Grading System (UTQGS)
7
Customer Information and Reporting Safety Defects
Quality grades can be found where applicable on the tire sidewa ll
between tread shoulder and maximum section width.
For example:
TREADWEAR 200 TRACTION AA TEMPERATURE A
UTQGS MARK (example):
UNIFORM TIRE QUALITY GRADING
TREADWEAR 200 TRACTION AA TEMPERATURE A

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YARIS SEDAN_OM_OM99S50z_(U)
7-7. Tire Information (U.S.A.)
Tire Labeling
Please refer to the sample below.
Federal law requires tire manufacturers to place standardized
information on the sidewall of all tires. This information identi-
fies and describes the fundamental characteristics of the tire
and also provides a tire identif ication number for safety stan-
dard certification and in case of a recall.
Information on Passenger Vehicle Tires
TIN: U.S. DOT tire identification
number
Passenger car tire
Nominal width of tire in millime-
ters
Ratio of height to width (aspect
ratio)
Radial
Run-flat tire
Rim diameter code Load index & speed symbol
Severe snow conditions
Tire ply composition and
materials used
Max. load rating
Tread wear, traction and tem-
perature grades
Max. permissible inflation
pressure
SAFETY WARNING1
2
3
4
5
6
7
8
9
10
11
12
13
14

YARIS SEDAN_OM_OM99S50z_(U)
5557-7. Tire Information (U.S.A.)
7
Customer Information and Reporting Safety Defects
P215/65R15 95H is an example of a tire size and load index rati ng.
Here is an explanation of the various components of that tire s ize and
load index rating. Note that the tire size and load index ratin g may be
different from the example.
● P
Indicates a tire that may be installed on cars, SUVs, minivans and
light trucks as desig nated by the Tire and R im Association (T&RA).
If your tire size does not begin with a letter this may mean it is desig-
nated by either ETRTO (European Tire and Rim Technical Organiza -
tion) or JATMA (Japan Tire Manufacturing Association).
● 215
“215” is the nominal width of th e tire in millimeters. This three-digit
number gives the width in millimet ers of the tire from sidewall edge
to sidewall edge. In general, the larger the number, the wider the
tire.
● 65
“65” is the aspect ratio. This two-digit number indicates the t ire’s
ratio of height to width.
● R
“R” is the tire construction sym bol. R indicates “Radial ply construc-
tion”.
● 15
“15” is the wheel rim diameter in inches.
● 95
“95” is the Load Index. This two-or three-digit number indicate s how
much weight each tire can support.
● H
“H” is the speed rating. The speed rating denotes the maximum
speed for which the use of the tire is rated.

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YARIS SEDAN_OM_OM99S50z_(U)
7-7. Tire Information (U.S.A.)
*: For tires with a maximum speed capability over 149 mph, tire manufac-
turers sometimes use the letters ZR. For tires with a maximum s peed
capability over 186 mph, tire manufacturers always use the letters ZR.
■M+S or M/S: Mud and Snow
AT: All Terrain.
AS: All Season. The “M+S” or “M/ S” indicates that the tire has some
functional use in mud and snow.
■U.S. DOT Tire Identification Number (TIN)
This begins with the letters “DOT” which indicates the tire mee ts all
federal standards. The next two numbers or letters are the plan t
code where it was manufactured, and the last four numbers repre -
sent the week and year the tire w as manufactured. For example,
the numbers 457 means the 45st week of 1997. After 2000 the
numbers go to four digits. For example, the number 2102 means
the 21th week of 2002. The othe r numbers are marketing codes
used at the manufacturer’s discr etion. This information is used to
contact consumers if a tire defect requires a recall.
■Tire Ply Composition and Materials Used
The number of plies indicates the number of layers of rubber-
coated fabric in the tire.
In general, the greater the number of plies, the more weight a tire
can support. Tire manufacturers also must indicate the tire mat eri-
als, which include steel, nylon, polyester, and other.
Letter RatingSpeed Rating
Q99 mph
R106 mph
S112 mph
T118 mph
U124 mph
H130 mph
V149 mph
W168* mph
Y186* mph

YARIS SEDAN_OM_OM99S50z_(U)
5577-7. Tire Information (U.S.A.)
7
Customer Information and Reporting Safety Defects
■Maximum Load Rating
This number indicates the maximum load in kilograms and pounds
that can be carried by the tire.
■Maximum Permissible Inflation Pressure
This number is the greatest amoun t of air pressure that should ever
be put in the tire under normal driving conditions.
■Tread Wear, Traction and Temperature Grades
●Tread wear: The tread wear grade is a comparative rating based
on the wear rate of the tire when tested under controlled condi -
tions on a specified government test course. For example, a tire
graded 150 would wear one and one-half (1 1/2) times as well on
the government course as a tire graded 100.
● Traction: The traction grades, from highest to lowest are AA, A ,
B, and C. The grades represent the tire’s ability to stop on we t
pavement as measured under controlled conditions on specified
government test surfaces of asphalt and concrete. A tire marked
C may have poor traction performance.
● Temperature: The temperature grades are A (the highest), B and
C, representing the tire’s res istance to the generation of heat and
its ability to dissipate heat w hen tested under controlled cond i-
tions on a specified indoor laboratory test wheel.
■Snow Tires
In some heavy snow areas, local governments may require true
snow tires, those with very deeply cut tread. These tires shoul d only
be used in pairs or placed on all four wheels. Make sure you pu r-
chase snow tires that are the sa me size and construction type as
the other tires on your vehicle.
■SAFETY WARNING
The following safety warning appears on the tire’s sidewall. SE RI-
OUS INJURY MAY RESULT FROM: • EXPLOSION OF TIRE/RIM ASSEMBLY DUE TO IMPROPER MOUNTING-MATCH TIRE DIAMETER TO RIM DIAMETER;
NEVER EXCEED 40 psi (275 kPa) TO SEAT BEADS-ONLY
SPECIALLY TRAINED PERSONS SHOULD MOUNT TIRES.
• TIRE FAILURE DUE TO UNDE R-INFLATION/OVERLOADING/
DAMAGE-FOLLOW OWNER’S MANUAL AND PLACARD IN
VEHICLE-FREQUENTLY CHECK INFLATION PRESSURE AND
INSPECT FOR DAMAGE.

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YARIS SEDAN_OM_OM99S50z_(U)
7-7. Tire Information (U.S.A.)
Please refer to the sample below.Temporary tires
Nominal width of tire in millime-
ters
Ratio of height to width (aspect
ratio)
Diagonal
Rim diameter code
Load index & speed symbol
T115/70D16 90M is an example of a tire size and load index rating.
Here is an explanation of the various components of that tire s ize and
load index rating. Note that the tire size and load index ratin g may be
different from the example.
● T
Indicates a tire that may be installed on cars, SUVs, minivans and
light trucks as desig nated by the Tire and R im Association (T&RA).
● 11 5
“115” is the nominal width of th e tire in millimeters. This three-digit
number gives the width in millimet ers of the tire from sidewall edge
to sidewall edge. In general, the larger the number, the wider the
tire.
● 70
“70” is the aspect ratio. This two-digit number indicates the t ire’s
ratio of height to width.
● D
“D” is the tire construction symbol. D indicates “diagonal ply con-
struction”.
● 16
“16” is the wheel rim diameter in inches.
Information on Temporary Tires
1
2
3
4
5
6

YARIS SEDAN_OM_OM99S50z_(U)
5597-7. Tire Information (U.S.A.)
7
Customer Information and Reporting Safety Defects
●90
“90” is the Load Index. This two-or three-digit number indicate s how
much weight each tire can support.
● M
“M” is the speed rating. The speed rating denotes the maximum
speed for which the use of the tire is rated.
Letter RatingSpeed Rating
M81 mph

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YARIS SEDAN_OM_OM99S50z_(U)
7-7. Tire Information (U.S.A.)
Location of the Tire Label (Placard)
You will find the tire label containing tire inflation pressure by tire size
and other important i nformation on the driver’s side B-pillar o r on the
edge of the driver’s door frame.
SAMPLE
On the tire label you will find t he recommended tire inflation pressure
in both kPa and psi for the tire s installed as original equipment on the
vehicle. It is very important that the inflation pressure of th e tires on
your vehicle is maintained at t he recommended pressure. You sho uld
check the tire pressure regularly to insure that the proper inf lation
pressure is maintained. Refer to Tires on P. 582.
Tire pressures listed on the vehicle placard or tire informatio n label indi-
cate the recommended cold tire inflation pressure, measured whe n the
tires are cold, after the vehicle has been parked for at least 3 hours. As
you drive, the temperature in the tire warms up, increasing the tire pres-
sure.
Recommended Tire Inflation Pressure