Zlornick
As I understand it: 70% (for example) means that the tyre wall height is 70% of the tyre width. So if a tyre is 195mm wide, then the wall is 70% of that, in other words 136.5mm high
I agree, it seems an overly complicated way of expressing the relationship between width and height. someone obviously got off on it!
Anyhow. Good luck
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