Originally Posted by
PeregrineA1
I have heard of, but not tried, using a needle and thread. The needle acting as a plumb bob. Hold the bike so the top tube is vertical and drop the needle in (attached to the thread....). Heard this trick after spending 3 hours re-threading the Teflon housing in a 2012 Madone 6.2-lost the housing inside the CF frame to start with.
I've done that with a shifting cable through the chainstay on a couple mid 80s Treks.
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