Originally Posted by
cyccommute
But 5mm housing won’t fit in that ferrule. And, I would suspect that the ferrule isn’t long enough to cover from the end of end of the braze-on to the loop. This kind of braze-on predates indexed shifting by at least a decade and may be 2.
I'd either run derailleur cable housing with this ferrule or no ferrule on brake cable housing, its really not a big deal either way. You said no ferrule would fit through the 5mm hole though, and thats just not true.