Quote:
Originally Posted by Tectoniic
The width affects the diameter. In 225/40/18 the 40 is not the height of the sidewall it is the ratio of the sidewall to the width of the tire.
225 x .40 (think of it as the height of the sidewall is 40% of the width) = 90
235 x .40 = 94
The 235 is ever so slightly taller.
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Oh snap I had a brain fart lol I was thinking it was 40% of the rim size
