Letter Rating; Speed Rating; Customer Information and Reporting Safety Defects- Page 563

8–29

Customer Information and Reporting Safety Defects

Tire Information (U.S.A.)

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

Mazda3_8FL6-EA-16F_Edition2.indb   29

2016/08/10   17:39:41