In order to determine the width of a 205/60 R16 tyre, we need only observe the first number in the description. Therefore, 205 is the distance between the two points most distant from each other on either flank, measured with the tyre mounted onto the rim and expressed in millimetres. The second number can be used to calculate flank height. 60 is a percentual value, expressing flank height in relation to width. Thus, multiplying this by 205 gives us a flank height of 123 mm. Such tyres should be mounted upon 16 inch rims – as specified by the final number.