One inch = 25.4 millimeters
235/65R16 metric tire has:
235 mm width, 65% profile and 16 inch wheel
profile is the height of the rubber expressed as a % of the width
the wheel size is in inches no matter what, so
235/25.4 = 9.25 inch width
235*.65/25.4 = 6 inch tire height
16+2*6=28 inch diameter so
28x9.25R16 is the inch equivalent
or diameter x width, wheel size all in inches
HTH :wave:
Brian