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A comment on Why A4? – The Mathematical Beauty of Paper Size. Parent comment
295mm tyre width, sidewall height is 30% of the width and the wheel it fits in is 20 inches (can't recall whether it's 20 inch radius or diameter).
(Is there anywhere that doesn't use this mix of measures for tire sizes [tyre syzes]?)
295mm tyre width, sidewall height is 30% of the width and the wheel it fits in is 20 inches (can't recall whether it's 20 inch radius or diameter).