Letter Rating; Speed Rating- Page 572

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 size and load

index rating. Note that the tire size and

load index rating may be di

ff

erent from

the example.

T

Indicates a tire that may be installed on

cars, SUVs, minivans and light trucks as

designated by the Tire and Rim

Association (T&RA).

115

“115” is the nominal width of the tire

in millimeters. 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.

70

“70” is the aspect ratio. This two-digit

number indicates the tire's ratio of

height to width.

D

“D” is the tire construction symbol. D

indicates “diagonal ply construction”.

16

“16” is the wheel rim diameter in

inches.

90

“90” is the Load Index. This two-or

three-digit number indicates 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 Rating

Speed Rating

M

81 mph

Customer Information and Reporting Safety Defects

Tire Information (U.S.A.)

8-26

Mazda3_8JM2-EA

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2020-7-10 17:21:34