The code on the side of automobile tire provides a information about the tire and its construction.
Examble: P145/65R15 95H
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Element
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Meaning
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initial letter(s)
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P indicates P-metric for the United States; LT for light truck; no letter indicates Euro metric; ST for special trailer; T for temporary spare tire
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3 digit number before /
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tire width in mm
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2 digit number after /
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aspect ratio (ratio of height to width in mm) as percent
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letter
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carcass construction (R radial; B bias belt; D diagonal; none indicates cross-ply tire)
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1 or 2 digit number
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rim diameter in inches
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2 or 3 digit number
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load index
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letter
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speed rating
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