Get Vehicle specifications -> Tire information Guide for Toyota Prius 4 Door Third Generation (2010-2015)

6-1. Spec ific at ions

Tire inform ation

Typical tire symbols

Full-size tire

Compact spare tire

6

ITO61P105

(P. 578)

(P. 577)

(P. 437)

Tire size

DOT and Tire Identification Number (TIN)

Location of treadwear indicators

575

6-1. Specifications

Tire ply composition and materials

Plies are layers of rubber-coated parallel cords. Cords are the

strands which form the plies in a tire.

Summer tires or all season tires

(P. 442)

An all season tire has “M+S” on the sidewall. A tire not marked

“M+S” is a summer tire.

Radial tires or bias-ply tires

A radial tire has “RADIAL” on the sidewall. A tire not marked

“RADIAL” is a bias-ply tire.

TUBELESS or TUBE TYPE

A tubeless tire does not have a tube and air is directly put into the

tire. A tube type tire has a tube inside the tire and the tube main-

tains the air pressure.

Load limit at maximum cold tire inflation pressure

Maximum cold tire inflation pressure

(P. 442)

(P. 569)

This means the pressure to which a tire may be inflated.

Uniform tire quality grading

For details, see “Uniform Tire Quality Grading” that follows.

“TEMPORARY USE ONLY”

A compact spare tire is identified by the phrase “TEMPORARY USE

ONLY” molded on its sidewall. This tire is designed for temporary

emergency use only.

576

6-1. Specifications

Typical DOT and Tire Identification Number (TIN)

DOT symbol*

Tire Identification Number

(TIN)

Tire manufacturer’s identifica-

tion mark

Tire size code

Manufacturer’s optional tire

type code (3 or 4 letters)

Manufacturing week

Manufacturing year

*: The DOT symbol certifies

that the tire conforms to

applicable Federal Motor

Vehicle Safety Standards.

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577

6-1. Specifications

Tire size

■ Typical tire size information

The illustration indicates typical tire size.

Tire use

(P = Passenger car,

T = Temporary use)

Section width (millimeters)

Aspect ratio

(tire height to section width)

Tire construction code

ITO61P106

(R = Radial, D = Diagonal)

Wheel diameter (inches)

Load index (2 digits or 3 digits)

Speed symbol

(alphabet with one letter)

■ Tire dimensions

Section width

Tire height

Wheel diameter

ITO61P103

578

6-1. Specifications

Tire section names

Bead

Sidewall

Shoulder

Tread

Belt

Inner liner

Reinforcing rubber

Carcass

Rim lines

Bead wires

Chafer

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579

6-1. Specifications

Uniform Tire Quality Grading

This information has been prepared in accordance with regulations

issued by the National Highway Traffic Safety Administration of the

U.S. Department of Transportation.

It provides the purchasers and/or prospective purchasers of Toyota

vehicles with information on uniform tire quality grading.

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 Federal Safety

Requirements in addition to these grades. Quality grades can be

found where applicable on the tire sidewall between tread shoulder

and maximum section width.

For example: Treadwear 200 Traction AA Temperature A

■ Treadwear

The treadwear grade is a comparative rating based on the wear

rate of the tire when tested under controlled conditions on a speci-

fied government test course.

For example, 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. Performance may differ significantly from the norm due

to variations in driving habits, service practices and differences in

road characteristics and climate.

580

6-1. Specifications

■ 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 pavement as

measured under controlled conditions on specified government

test surfaces of asphalt and concrete.

A tire marked C may have poor traction performance.

Warning: The traction grade assigned to this tire is based on braking

(straight ahead) traction tests and does not include cornering (turn-

ing) traction.

■ Temperature A, B, C

The temperature grades are A (the highest), B, and C, represent-

ing the tire’s resistance to the generation of heat and its ability to

dissipate heat when tested under controlled conditions on a speci-

fied 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 labo-

ratory test wheel than the minimum required by law.

Warning: The temperature grades of a tire assume that it is properly

inflated and not overloaded.

6

Excessive speed, underinflation, or excessive loading, either sepa-

rately or in combination, can cause heat buildup and possible tire fail-

ure.

581

6-1. Specifications

Glossary of tire terminology

Tire related term

Meaning

Tire pressure when the vehicle has been

Cold tire inflation pres- parked for three hours or more, or has not

sure

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

Maximum inflation

pressure

Recommended infla-

tion pressure

Cold tire inflation pressure recommended by a

manufacturer

The combined weight (in excess of those stan-

dard items which may be replaced) of auto-

matic 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)

Accessory 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 additional weight optional

engine

Curb weight

The sum of:

(a) Curb weight

(b) Accessory weight

(c) Vehicle capacity weight

(d) Production options weight

Maximum loaded vehi-

cle weight

582

6-1. Specifications

Tire related term

Meaning

150 lb. (68 kg) times the number of occupants

specified in the second column of Table 1* that

follows

Normal occupant

weight

Distribution of occupants in a vehicle as speci-

fied in the third column of Table 1* below

Occupant distribution

The combined weight of installed regular pro-

duction options weighing over 5 lb. (2.3 kg) in

excess of the standard items which they

replace, not previously considered in curb

weight or accessory weight, including heavy

duty brakes, ride levelers, roof rack, heavy duty

12-volt battery, and special trim

Production options

weight

A metal support for a tire or a tire and tube

assembly upon which the tire beads are seated

Rim

Rim diameter

(Wheel diameter)

Nominal diameter of the bead seat

Rim diameter and width

Rim size designation

Rim type designation

Rim width

The industry 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 150 lb.

(68 kg) times the vehicle’s designated seating

capacity

6

583

6-1. Specifications

Tire related term

Meaning

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 curb

weight, accessory weight, and normal occu-

pant weight (distributed in accordance with

Table 1* below), and dividing by two

Vehicle normal load

on the tire

The surface area of the rim not covered by the

inflated tire

Weather side

Bead

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

A breakdown of the bond between components

in the bead

Bead separation

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 cen-

terline of the tread

Bias ply tire

The tire structure, except tread and sidewall

rubber which, when inflated, bears the load

Carcass

The breaking away of pieces of the tread or

sidewall

Chunking

584

6-1. Specifications

Tire related term

Cord

Meaning

The strands forming the plies in the tire

The parting of cords from adjacent rubber com-

pounds

Cord separation

Cracking

Any parting within the tread, sidewall, or inner-

liner of the tire extending to cord material

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

CT

A tire designed to operate at higher loads and

at higher inflation pressures than the corre-

sponding standard tire

Extra load tire

Groove

The space between two adjacent tread ribs

The layer(s) forming the inside surface of a

tubeless tire that contains the inflating medium

within the tire

Innerliner

The parting of the innerliner from cord material

in the carcass

Innerliner separation

6

585

6-1. Specifications

Tire related term

Meaning

(a) The sidewall that contains a whitewall,

bears white lettering, or bears manufac-

turer, 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 asym-

metrical tire that has a particular side that

must always face outward when mounted

on a vehicle

Intended outboard

sidewall

A tire designated by its manufacturer as prima-

rily intended for use on lightweight trucks or

multipurpose passenger vehicles

Light truck (LT) tire

The maximum load that a tire is rated to carry

for a given inflation pressure

Load rating

The load rating for a tire at the maximum per-

missible inflation pressure for that tire

Maximum load rating

Maximum permissible

inflation pressure

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

Outer diameter

The overall diameter of an inflated new tire

586

6-1. Specifications

Tire related term

Overall width

Meaning

The linear distance between the exteriors of

the sidewalls of an inflated tire, including eleva-

tions due to labeling, decorations, or protective

bands or ribs

A tire intended for use on passenger cars, mul-

tipurpose 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

A parting of rubber compound between adja-

cent plies

Ply separation

A mechanical device made of rubber, chemi-

cals, fabric and steel or other materials, that,

when mounted on an automotive wheel, pro-

vides 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

A tire designed to operate at higher loads and

at higher inflation pressures than the corre-

sponding standard tire

6

587

6-1. Specifications

Tire related term

Meaning

The linear distance between the exteriors of

the sidewalls of an inflated tire, excluding ele-

vations due to labeling, decoration, or protec-

tive bands

Section width

That portion of a tire between the tread and

bead

Sidewall

The parting of the rubber compound from the

cord material in the sidewall

Sidewall separation

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 which

Snow tire

is marked with an Alpine Symbol (

least one sidewall

) on at

The rim on which a tire is fitted for testing, and

may be any rim listed as appropriate for use

with that tire

Test rim

That portion of a tire that comes into contact

with the road

Tread

A tread section running circumferentially

around a tire

Tread rib

588

6-1. Specifications

Tire related term

Tread separation

Meaning

Pulling away of the tread from the tire carcass

The projections within the principal grooves

designed to give a visual indication of the

degrees of wear of the tread

Treadwear indicators

(TWI)

The fixture used to hold the wheel and tire

assembly securely during testing

Wheel-holding fixture

*:Table 1  Occupant loading and distribution for vehicle normal load

for various designated seating capacities

Designated seating

capacity, Number of

occupants

Occupant distributionin

a normally loaded vehi-

cle

Vehicle normal load,

Number of occupants

2 through 4

2

3

2 in front

2 in front, 1 in second

seat

5 through 10

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

6

589

Vehicle specifications -> Tire information for Your Toyota Prius 4 Door Third Generation (2010-2015)

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