Customer Information and Reporting Safety Defects; Tire Information (U.S.A.)- Page 552

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Customer Information and Reporting Safety Defects

Tire Information (U.S.A.)

 Information on Temporary Tires

Please refer to the sample below.

1.  Temporary tires

2.  Nominal width of tire in millimeters
3.  Ratio of height to width (aspect ratio)

4. Diagonal

5.  Rim diameter code
6.  Load index & speed symbol

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 different 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”.

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