10-speed frames



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Adam Rush

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Okay, I haven't been doing that much with bikes for more than the last 3 or 4 years, but I have
noticed something: All these 10-speeds (road bikes from the bike boom) from the 70's-80's that I've
been riding look so much alike. Schwinn, Sekai, Matsushita Electric, etc... I realise that the
bicycle industry is rife with imitation (to put it nicely), but did this frame design stem from one
common ancestor?

I doubt I'm doing a good job of transcribing this question which has been bouncing around my
head--so have me elaborate, I'll be lurking.

Gentle cycle only, Adam Rush
 
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