165/65R13 is a tyre size designation used for passenger cars. The numbers represent the tyre’s dimensions:
165 – The tyre width is in millimetres, measured from sidewall to sidewall.
65 – The aspect ratio, which is the height of the tyre’s sidewall as a percentage of its width.
R – The construction type of the tyre, where “R” stands for radial.
13 – The diameter of the wheel, in inches, that the tyre is designed to fit.
So a 165/65R13 tyre is a radial tyre with a width of 165mm, an aspect ratio of 65% of the width, and is designed to fit a 13-inch wheel.





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