D-A 9S shifting trouble

I found it! It's the plastic cable holder underneath the bottom bracket: the
bolt disappeared and the plastic holder traveled away (or what expression
does one use for that?).

Greets, Derk

You can obtain that cable guide from your local bike shop. Shimano
makes one, however it may not fit your bottom bracket shell. On my
Cannondale CAAD4, the guide that Shimano provided did not fit. I had
to use the one provided by Cannondale. This may not be the case with
other frames.

Claude

Zog The Undeniable said:

I have one which doesn't quite match the curve of the BB shell. It
bends as the cable tension increases, which doesn't help much with
accurate indexing. The old brazed-on metal ones may be a rust trap, but
at least they're rigid.

I FULLY agree! My neigbour once broke his cable guide(?) in 2 pieces. I now
seem to have lost a cable guide's bolt and the consequences are rather
severe. It's something I recommend to take on long rides as a spare part.

Greetings, Derk

Derk said:

Zog The Undeniable said:

I have one which doesn't quite match the curve of the BB shell. It
bends as the cable tension increases, which doesn't help much with
accurate indexing. The old brazed-on metal ones may be a rust trap, but
at least they're rigid.

I FULLY agree! My neigbour once broke his cable guide(?) in 2 pieces. I now
seem to have lost a cable guide's bolt and the consequences are rather
severe. It's something I recommend to take on long rides as a spare part.

Greetings, Derk

Most times if you loose the bolt you can use one from the water bottle
hanger until you get to an Ace hardware to get a new metric hex bolt.
(They are about 0.75 a piece)

-nc

Zog The Undeniable said:

Derk said:

I found it! It's the plastic cable holder underneath the bottom
bracket: the
bolt disappeared and the plastic holder traveled away (or what expression
does one use for that?).

I have one which doesn't quite match the curve of the BB shell. It
bends as the cable tension increases, which doesn't help much with
accurate indexing. The old brazed-on metal ones may be a rust trap, but
at least they're rigid.

Would a long skinny shim (parallel to the BB spindle) help?

-nc

Derk said:

Hi,

While cycling I suddenly realized my chain wasn't changing gears well and
sometimes didn't downshift at all, or with a delay. I went to my LBS and
they retensioned the rear der. cable.
On my way back home, the shifting problems started all over again: noises
and slow/misshifting. At home I checked cable tension and the cable is very
loose again! It's a cable that has served for 3000 km's.

What could be wrong here?

TIA! Derk

Fraying/breaking cable? Split housing?

Qui si parla Campagnolo said:

Fraying/breaking cable? Split housing?

Thanks Peter, but I found the cause already: it was the plastic cable guide
underneath the BB: the center bolt was missing and the whole thing had
traveled a few cm's........

Greetings, Derk