Get INFORMATIONBEFOREDRIVINGYOURTOYOTA -> Tire information Guide for Toyota 4 Runner SUV Fourth Generation (2003-2009)

07 12.25

Tire information—

—Tire symbols

This illustration indicates typical tire

symbols.

1. Tire size—For details, see “—Tire

size” on page 354.

2. DOT and Tire Identification

Number (TIN)—For details, see

“—DOT and Tire Identification

Number (TIN)” on page 353.

3. Uniform tire quality grading—

For details, see “Uniform tire quali-

ty grading” that follows.

4. The location of the treadwear

indicators—For details, see

“Checking and replacing tires” on

page 443.

CY20028y

5. Tire ply composition and mate-

rials—Plies mean a layer of rub-

ber−coated parallel cords. Cords

mean the strands forming the plies

in the tire.

6. Radial tires or bias−ply tires—A

radial tire has “RADIAL” on the

sidewall. A tire not marked with

“RADIAL” is a bias−ply tire.

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—DOT and Tire Identification

Number (TIN)

7. “TUBELESS”

or

“TUBE

The “DOT” symbol certifies that the

tire conforms to applicable Federal

Motor Vehicle Safety Standards.

TYPE”—A tubeless tire does not

have a tube inside the tire and air

is directly filled in the tire. A tube

type tire has a tube inside the tire

and the tube maintains the air

pressure.

CY20027

8. Load limit at maximum cold tire

inflation pressure—For details,

see “Checking and replacing tires”

on page 443.

9. Maximum cold tire inflation

pressure—This means the pres-

sure to which a tire may be in-

flated. For details about recom-

This illustration indicates typical DOT

and Tire Identification Number (TIN).

1. “DOT” symbol

mended

cold

tire

inflation

pressure, see “Tires” on page 467.

2. Tire Identification Number (TIN)

10.Summer tire or all season

tire—An all season tire has “M+S”

on the sidewall. The tire not

marked with “M+S” is a summer

tire. For details, see “Types of

tires” on page 368.

3. Tire manufacturer’s identification

mark

4. Tire size code

5. Manufacturer’s optional tire type

code (3 or 4 letters)

6. Manufacturing week

7. Manufacturing year

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—Tire size

—Name of each section of tire

CY20029

Z20007

Z20008

This illustration indicates typical tire

size.

1. Tire use (P=Passenger car,

T=Temporary use)

2. Section width (in millimeters)

3. Aspect ratio (tire height to section

width)

4. Tire construction code (R=Radial,

D=Diagonal)

5. Wheel diameter (in inches)

6. Load index (2 digits or 3 digits)

7. Speed symbol (alphabet with one

letter)

1. Section width

2. Tire height

3. Wheel diameter

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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—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.

Treadwear—The treadwear 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

conditions of their use, however, and

may depart significantly from the

norm due to variations in driving hab-

its, 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.

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

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Temperature A, B, C—The tempera-

ture grades are A (the highest), B,

and C, representing the tire’s resis-

tance 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 cor-

responds 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.

Warning: The temperature grades for

this tire are established for a tire that

is properly inflated and not over-

loaded. Excessive speed, underinfla-

tion, or excessive loading, either sep-

arately or in combination, can cause

heat buildup and possible tire failure.

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—Glossary of tire terminology

Tire related term

Meaning

tire inflation pressure when the vehicle has been parked for at least 3 hours

or more, or it has not been driven more than 1.5 km or 1 mile under that

condition

Cold tire inflation pressure

the maximum cold inflation pressure to which a tire may be inflated and it is

shown on the sidewall of the tire

Maximum inflation pressure

Recommended inflation pressure

cold tire inflation pressure recommended by a manufacturer

the combined weight (in excess of those standard items which may be replaced)

of automatic transmission, power steering, power brakes, power windows, pow-

er seats, radio, and heater, to the extent that these items are available as

factory−installed equipment (whether installed or not)

Accessory weight

Curb weight

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 addi-

tional weight optional engine

the sum of—

(a) curb weight;

(b) accessory weight;

(c) vehicle capacity weight; and

(d) production options weight

Maximum loaded vehicle weight

Normal occupant weight

68 kg (150 lb.) times the number of occupants specified in the second column

of Table 1 that follows

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Tire related term

Meaning

distribution of occupants in a vehicle as specified in the third column of Table

1 that follows

Occupant distribution

Production options weight

Rim

the combined weight of those installed regular production options weighing over

2.3 kg (5 lb.) in excess of those standard items which they replace, not pre-

viously considered in curb weight or accessory weight, including heavy duty

brakes, ride levelers, roof rack, heavy duty battery, and special trim

a metal support for a tire or a tire and tube assembly upon which the tire beads

are seated

Rim diameter (Wheel diameter)

Rim size designation

Rim type designation

Rim width

nominal diameter of the bead seat

rim diameter and width

the industry of manufacturer’s designation for a rim by style or code

nominal distance between rim flanges

Vehicle capacity weight

(Total load capacity)

the rated cargo and luggage load plus 68 kg (150 lb.) times the vehicle’s desig-

nated seating capacity

the 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 maximum 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

Vehicle normal load on the tire

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Tire related term

Meaning

Weather side

the surface area of the rim not covered by the inflated tire

the part of the tire that is made of steel wires, wrapped or reinforced by ply

cords and that is shaped to fit the rim

Bead

Bead separation

Bias ply tire

a breakdown of the bond between components in the bead

a pneumatic tire in which the ply cords that extend to the beads are laid at

alternate angles substantially less than 90 degrees to the centerline of the tread

the tire structure, except tread and sidewall rubber which, when inflated, bears

the load

Carcass

Chunking

Cord

the breaking away of pieces of the tread or sidewall

the strands forming the plies in the tire

Cord separation

the parting of cords from adjacent rubber compounds

any parting within the tread, sidewall, or innerliner of the tire extending to cord

material

Cracking

CT

a pneumatic tire with an inverted flange tire and rim system in which the rim

is designed with rim flanges pointed radially inward and the tire is designed

to fit on the underside of the rim in a manner that encloses the rim flanges

inside the air cavity of the tire

a tire designed to operate at higher loads and at higher inflation pressures

than the corresponding standard tire

Extra load tire

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Tire related term

Meaning

Groove

the space between two adjacent tread ribs

the layer(s) forming the inside surface of a tubeless tire that contains the inflat-

ing medium within the tire

Innerliner

Innerliner separation

the parting of the innerliner from cord material in the carcass

(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

Intended outboard sidewall

(B) the outward facing sidewall of an asymmetrical tire that has a particular

side that must always face outward when mounted on a vehicle

a tire designated by its manufacturer as primarily intended for use on lightweight

trucks or multipurpose passenger vehicles

Light truck (LT) tire

Load rating

the maximum load that a tire is rated to carry for a given inflation pressure

the load rating for a tire at the maximum permissible inflation pressure for that

tire

Maximum load rating

Maximum permissible inflation pres-

sure

the maximum cold inflation pressure to which a tire may be inflated

the rim on which a tire is fitted for physical dimension requirements

Measuring rim

any parting at any junction of tread, sidewall, or innerliner that extends to cord

material

Open splice

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Tire related term

Meaning

Outer diameter

the overall diameter of an inflated new tire

the linear distance between the exteriors of the sidewalls of an inflated tire,

including elevations due to labeling, decorations, or protective bands or ribs

Overall width

a tire intended for use on passenger cars, multipurpose passenger vehicles,

and trucks, that have a gross vehicle weight rating (GVWR) of 10,000 lb. or

less

Passenger car tire

Ply

a layer of rubber−coated parallel cords

Ply separation

a parting of rubber compound between adjacent plies

a mechanical device made of rubber, chemicals, fabric and steel or other mate-

rials, that, when mounted on an automotive wheel, provides the traction and

contains the gas or fluid that sustains the load

Pneumatic tire

a pneumatic tire in which the ply cords that extend to the beads are laid at

substantially 90 degrees to the centerline of the tread

Radial ply tire

Reinforced tire

Section width

a tire designed to operate at higher loads and at higher inflation pressures

than the corresponding standard tire

the linear distance between the exteriors of the sidewalls of an inflated tire,

excluding elevations due to labeling, decoration, or protective bands

Sidewall

that portion of a tire between the tread and bead

Sidewall separation

the parting of the rubber compound from the cord material in the sidewall

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Tire related term

Meaning

a tire that attains a traction index equal to or greater than 110, compared to

the ASTM E−1136 Standard Reference Test Tire, when using the snow traction

test as described in ASTM F−1805−00, Standard Test Method for Single Wheel

Driving Traction in a Straight Line on Snow−and Ice−Covered Surfaces, and

Snow tire

Test rim

which is marked with an Alpine Symbol (

) on at least one sidewall

the rim on which a tire is fitted for testing, and may be any rim listed as appropri-

ate for use with that tire

Tread

that portion of a tire that comes into contact with the road

a tread section running circumferentially around a tire

pulling away of the tread from the tire carcass

Tread rib

Tread separation

the projections within the principal grooves designed to give a visual indication

of the degrees of wear of the tread

Treadwear indicators(TWI)

Wheel−holding fixture

the fixture used to hold the wheel and tire assembly securely during testing

362

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Table 1– Occupant loading and distribution for vehicle normal load for various designated seating capacities

Designated seating capacity, number Vehicle normal load, number of occu- Occupant distribution in a normally

of occupants

2 through 4

5 through 10

pants

loaded vehicle

2

3

2 in front

2 in front, 1 in second seat

2 in front, 1 in second seat, 1 in third

seat, 1 in fourth seat

11 through 15

16 through 20

5

7

2 in front, 2 in second seat, 2 in third

seat, 1 in fourth seat

363

INFORMATIONBEFOREDRIVINGYOURTOYOTA -> Tire information for Your Toyota 4 Runner SUV Fourth Generation (2003-2009)

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