Originally Posted by
Kontact
How are they getting past 4mm ferrules? Sounds like a ferrule problem.
As the cladding shrinks back, the rods will bend inwards as pressure is applied. The inner cable then catches rods that are loose and pulls them through the ferrule. The hole on the ferrule doesn’t fit the inner cable tightly…it can’t and work properly. But it’s also not wide enough for the inner cable to pass smoothly through with one of the rods trapped in there as well. That causes the whole shifter to jam and not perform properly.
As I said before, I couldn’t figure out why the manufacturers were cutting back the ends of the cable housing until I observed that the cladding on my own housing had shrunk
and that a rod had pulled through. I have experienced the rods pulling out of the housing without the shrinkage as well. Generally speaking, I don’t see this kind of problem with Shimano brand housing. It appears to be more of an issue with generic housing in my experience.