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Craftsman 0220 User Manual

Page 31

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P: The “P” indicates the tire is for passenger vehicles.

Next number: This three-digit number gives the width in millimeters of the tire

from sidewall edge to sidewall edge. In general, the larger the number, the wider

the tire.

Next number: This two-digit number, known as the aspect ratio, gives the tire’s

ratio of height to width. Numbers of 70 or lower indicate a short sidewall for

improved steering response and better overall handling on dry pavement.

R: The “R” stands for radial. Radial ply construction of tires has been the industry

standard for the past 20 years.

Next number: This two-digit number is the wheel or rim diameter in inches. If

you change your wheel size, you will have to purchase new tires to match the new

wheel diameter.

Next number: This two- or three-digit number is the tire’s load index. It is

a measurement of how much weight each tire can support. You may find this

information in your owner’s manual. If not, contact a local tire dealer. Note: You

may not find this information on all tires because it is not required by law.

M+S: The “M+S” or “M/S” indicates that the tire has some mud and snow

capability. Most radial tires have these markings; hence, they have some mud and

snow capability.

Speed Rating: The speed rating denotes the speed at which a tire is designed to be

driven for extended periods of time. The ratings range from 99 miles per hour

(mph) to 186 mph. Note: You may not find this information on all tires because it is

not required by law.

* For tires with a maximum speed capability over 149 mph, tire manufacturers

sometimes use the letters ZR. For those with a maximum speed capability over 186

mph, tire manufacturers always use the letters ZR.

U.S. DOT Tire Identification Number

This begins with the letters “DOT” and indicates that the tire meets all

Nominal width of

tire in millimeters

Radial

Ratio of height to

width (aspect ratio)

Max.

permissable

inflation

pressure

Passenger

car tire

Treadwear, traction

and temperature grades

Max. load rating

Tire ply

composition

and materials

used

Sever snow

conditions

U.S. doT tire

identification number

load index &

speed symbol

Rim diameter

code