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Old 04-16-17, 01:10 AM
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Chombi1 
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Basically a fad in the 80's that went with the effort to "clean up" the frames aerodynamically.
Cables were tucked into frame tubes were possible, away from the air stream.
I guess we can't really call doing so just a fad, as modern bikes today, have the same thing. although they do not have the same top tube corrosion cracking problems with such on steel bikes from the late 80's.
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