The dynamic wheel-radius cannot be determined from the tyre description, indeed, the radius/diameter can. The precision is limited, because in the case of, e.g., the tyre-width, we're dealing with a grid dimension. Regardless of whether the tyre is 209 mm or 201 mm wide, the tyre always has the description '205'.
Top to bottom
Ratio height to width
Inch -> mm
dR: Tyre diameter in mm, cm, dm, m b: Tyre width in mm, cm, dm, m h/b: Ratio from height to width in percent dF: Rim diameter in inch
160/60 ZR 17
b = 160 mm; h/b = 60; dF = 17 Zoll
205/65 R 15 86T
b = 205 mm; h/b = 65; dF = 15 Zoll
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