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Why is the bicycle such a relatively recent invention in history?

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Why is the bicycle such a relatively recent invention in history?
>>
couldn't get the rubber or steel for it until the industrial revolution and imperialism
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>>3134616
walk-bikes were around in the 1800. I guess the need for a sprocket which is hard to manufactur.

>>3134621
This guy is a retard
>>
>>3134631
sorry for my english
>>
>>3134616
they require a ton of precision in manufacturing. look at essentially any mass-market manufactured goods from even just ~1800. the quality is utterly primitive by modern standards.
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