So if the question is when did 1" become standard I guess we need to know was there a range of unstandardised diameters before that? Or did they just start by making a bicycle out of metal and pull a bit of pipe of the shelf that was already 1".
@pipwish started
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So if the question is when did 1" become standard I guess we need to know was there a range of unstandardised diameters before that? Or did they just start by making a bicycle out of metal and pull a bit of pipe of the shelf that was already 1".