Originally Posted by
Gege-Bubu
The derailleur goes high and low as tension is changed by shifter. The housing will cover and route the cable where it cannot go straight, but need to "make turns" around the frame. In my case the cable goes almost straight line from the aerobar housing into the frame inlet. It does not turn or twist. The housing from the aerobar to frame is used also for inline barrel adjuster that would push housing and gives additional tension to the cable. However, as the end of the housing is no longer pushed against the frame inlet, the barrel adjuster is loose, and cannot be manipulated.
I can still shift my gear, but cannot adjust them. I will use RD barrel adjuster to make the desired tension on the cable. Instead of TWO tension adjusters, I have only ONE now. The situation is no ideal, but it is not a big deal, since I can shift my gears securely.
Hope it helps
However, I will need to fix it one day
That is why I am asking is there better ferrule for my frame.
I wouldn't be trying to offer advice on the mechanic's forum if I didn't know how derailleurs work and interact with their actuating cables and shifters.
Housing ferrules have an O/D larger than that of shift cable housing, since they have to cover the end of them. If your housing is already cut to length (to reach from the Aerobar to the inlet of the frame), and the ferrule itself was small enough to push past the inlet and into the frame,
what exactly is keeping the housing from also pushing into the hole? The Housing needs to have a firm STOP on something in order for it not to simply move (become effectively shorter) when you're actuating the levers to shift to a lower gear.
In it's current state, does the housing move around somewhat loosely on the outside of the frame inlet hole? You said it's too "loose" to effectively use the barrel adjuster, which sounds like it's not OK the way it is.
Are you sure the "cable stop" that you're talking about isn't just a narrowing of the hole that's designed to fit the housing snugly so that water and junk doesn't get into the frame during use? I know you're standing firm on the point that it's not intended for continuous housing, but everything you describe thus far indicates that that's exactly what it's designed for.
-Jeremy