1432003 MR2 from Aug. ’03 Prod. (OM17511U)
SB21021
This illustration indicates typical tire
size.1. Section width (in millimeters)
2. Aspect ratio (tire height to section width)
3. Tire construction code (R=Radial, D=Diagonal)
4. Wheel diameter (in inch)
5. Load index (2 digits or 3 digits)
6. Speed symbol (alphabet with one letter)
SU21026a
1. Section width
2. Tire height
3. Wheel diameter
SU21027
1. Bead
2. Sidewall
3. Shoulder
4. Tread
5. Belt
6. Inner liner
7. Reinforcing rubber
8. Carcass
9. Rim lines
10.Bead wires
11. Chafer
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—Tire size —Name of each section of tire
1442003 MR2 from Aug. ’03 Prod. (OM17511U)
—Uniform tire quality grading
This information has been prepared
in accordance with regulations issued
by the National Highway Traffic Safe-
ty Administration of the U.S. Depart-
ment of Transportation. It provides
the purchasers and/or prospective
purchasers of Toyota vehicles with in-
formation on uniform tire quality grad-
ing.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
DOT quality grades—All passenger
vehicle tires must conform to Fed-
eral Safety Requirements in addi-
tion to these grades. Quality
grades can be found where appli-
cable on the tire sidewall between
tread shoulder and maximum sec-
tion width. For example: Treadwear
200 Traction AA Temperature A.Treadwear—
The tread wear grade is
a comparative rating based on the
wear rate of the tire when tested un-
der controlled conditions on a speci-
fied government test course. For ex-
ample, 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 con-
ditions 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 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 pave-
ment as measured under controlled
conditions on specified government
test surfaces of asphalt and concrete.
A tire marked C may have poor trac-
tion performance. Warning: The traction grade assigned
to this tire is based on braking
(straight ahead) traction tests and
does not include cornering (turning)
traction.
Temperature A, B, C—
T he tem per a-
ture grades are A (the highest), B,
and C, representing the tire’s resist-
ance to the generation of heat and its
ability to dissipate heat when tested
under controlled conditions on a spe-
cified indoor laboratory test wheel.
Sustained high temperature can
cause the material of the tire to de-
generate and reduce tire life, and ex-
cessive temperature can lead to sud-
den 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 per-
formance on the laboratory test wheel
than the minimum required by law.
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1472003 MR2 from Aug. ’03 Prod. (OM17511U)
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 68 kg (150 lb.) times the vehicle’s
designated seating capacity
Intended outboard sidewall
(A) The sidewall that contains a whitewall, bears white lettering or bears
manufacturer, brand, and/or model name molding that is higher or deeper
than the same molding on the other sidewall of the tire, or
(B) The outward facing sidewall of an asymmetrical tire that has a particula
r
side that must always face outward when mounted on a vehicle
Occupant distributionDistribution of occupants in a vehicle as specified in the third column of Table
1 that follows
RimA 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 designationRim diameter and width
Rim type designationThe industry of manufacturer ’s designation for a rim by style or code
Rim widt hNominal distance between rim flanges
Vehicle maximum load on the tireThe 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
Vehicle normal load on the tire
The load on an individual tire that is determined by distributing to each axle
its share of the curb weight, accessory weight, and normal occupant weight
(distributed in accordance with Table 1 that follows) and dividing by two
Weather sideThe surface area of the rim no t covered by the inflated tire
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