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 tha t 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 ins talled on cars, SUVs, minivans and light trucks as designated
by the Tire and Rim Association (T&RA).
11 5
“115” is the nominal width of the tire in millimeters. This thr ee-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 t ire'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 indicate s how much weight each tire
can support.
M
“M” is the speed rating. The speed rating denotes the maximum s peed for which the use of
the tire is rated.
Letter Rating Speed Rating
M8 1 m ph
Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
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Mazda6_8JN3-EA-20H_Edition1_old 2020-6-18 17:31:27
