Cable Stretch ?

[Stu Smith]

Do gear cables or brake cable stretch? Read on a different thread (can't find it now) that they don't.
So why would I periodically have to adjust the rear derailleur indexing..

 

[Gatters]

could be the jockey wheel bearings wearing?

 

[screenman]

Do gear cables or brake cable stretch? Read on a different thread (can't find it now) that they don't.
So why would I periodically have to adjust the rear derailleur indexing..

When was the last time you checked hanger alignment?

 

[Stu Smith]

When was the last time you checked hanger alignment?

I haven't and to be honest, I wouldn't know how to. The Indexing does not require adjusting regular just occasionally, I've always put this down as cable stretch.

 

[DWiggy]

Cable might be slipping, check the bolt that pinches the cable

 

[screenman]

I haven't and to be honest, I wouldn't know how to. The Indexing does not require adjusting regular just occasionally, I've always put this down as cable stretch.

You should start every adjustment of the rear mech by checking the hanger alignment first, we have found even one's that have not been knocked since the last time they were checked will go out slightly.

 

[Stu Smith]

You should start every adjustment of the rear mech by checking the hanger alignment first

Its never entered my head to check the hanger alignment, the rear mech as never had a knock as far as I know?
I'll check on YouTube how to check the alignment and see if its out..

Cable might be slipping, check the bolt that pinches the cable

The pinch bolt is tight, thanks for the suggestion..

 

[Yellow Saddle]

Do gear cables or brake cable stretch? Read on a different thread (can't find it now) that they don't.
So why would I periodically have to adjust the rear derailleur indexing..

I thought it was all explained in that thread. Which part is still a mystery?

 

[Drago]

Do gear cables or brake cable stretch? Read on a different thread (can't find it now) that they don't.
So why would I periodically have to adjust the rear derailleur indexing..

On the other thread to which you make reference there are several posts explaining by what mechanism the outers wear and compress, thus apparently shortening in relation to the inner and necessitating occasional adjustment of the mech.

 

[User6179]

Chains don't stretch either !

 

[wam68]

The subject is covered in a comprehensive manner on this thread. Enjoy

Tiagra - Temperamental rear derailleur?

 

[User6179]

The subject is covered in a comprehensive manner on this thread. Enjoy

Tiagra - Temperamental rear derailleur?

Sorry , what thread ?

 

[Stu Smith]

The subject is covered in a comprehensive manner on this thread. Enjoy

Tiagra - Temperamental rear derailleur?

Thanks..I knew I'd seen it..

 

[wam68]

Sorry , what thread ?

Stick Tiagra into the search box and it brings it up straightaway. Tried to paste the link but it seems to be faulty. Regards.

 

[Gravity Aided]

https://www.cyclechat.net/threads/tiagra-temperamental-rear-derailleur.173753/