Derailleur adjustment advice

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The rear Derailleur has started to hesitate---or not shift at all---
during normal shifting. It's Ultegra with STI's. My first thought was
to turn the barrel nut counter-Clockwise (tighten the cable). However
that didn't work. What else can it be?
Thanks,
Bob

"Bob" wrote:

> The rear Derailleur has started to hesitate---or not shift at all---
> during normal shifting. It's Ultegra with STI's. My first thought was
> to turn the barrel nut counter-Clockwise (tighten the cable). However
> that didn't work. What else can it be?

See:

http://www.sheldonbrown.com/derailer-adjustment.html

If the "hesitation" only happens when shifting to a smaller sprocket, the
problem may be friction in the cables/housings or the BB cable guide.

Might also be the STI lever going south.

Art Harris

http://sheldonbrown.com/derailer-adjustment.html has all the info you need.

From your description the problem could be:

(a) cable tension, though you didn't specify whether the hesitation is shifting
up or down or both

(b) other cable problem, such as dirt or fraying inside the housing, that
prevents normal motion

(c) derailleur needs lubrication

(d) derailleur hanger bent

(e) internal shifter problem

Let us know what you find.



Mike Yankee

(Address is munged to thwart spammers.
To reply, delete everything after "com".)

bob-<< The rear Derailleur has started to hesitate---or not shift at all---
during normal shifting. It's Ultegra with STI's. My first thought was
to turn the barrel nut counter-Clockwise (tighten the cable). However
that didn't work. What else can it be? >><BR><BR>

gooked up inner wire and/or housing or gooked up under BB cable guide. Unhook
the cable and push the der up the cogset while pedaling....in the stand...does
it go up and down smoothly? Then it's related to either adjustment or the
cable/housing.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"