Quote:
Originally Posted by HazardousRanger
oh i see i didnt know it was the width
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yeh...technically that number has a little to do with height but generally a 285 and a 305 are 33s.
First number is section width is millimeters(305mm is around 12"), next number is sidewall height as a ratio (sidewall height is 75% of 305mm), third number is rim diameter(16).
75% of 12 is ~9, 9+9+16 is 34. So according to the math a 305/75R16 should be a 34x12x16. Only problem is a 305/75R16 doesn't exist that I know of.