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Problems with triple chainring front derailleur (Ultegra)



 
 
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  #1  
Old July 26th 05, 09:44 PM
Bob in CT
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Default Problems with triple chainring front derailleur (Ultegra)

I adjusted the front Ultegra derailleur on my Lemond bike by using the
following:

http://www.parktool.com/repair_help/...railleur.shtml

(I even have a fourth hand tool!) The derailleur does not appear to be
shifting far enough over toward the large chainring. In the small
chainring, I have to push twice sometimes to get the derailleur to shift
to the middle chainring. In the middle chainring, I can use the large
cogs on the rear cassette with no problem, but the chain begins to rub on
the small cogs. When I'm in the large chainring, I have rubbing on
basically all gears but definitely the small cogs of the cassette.

To me, it looks that if the derailleur would move farther out (toward the
large chainring) by about 1/8 inch, all my problems would be solved.
However, the barrel adjuster appears to be broken -- even after I've taken
it apart and regreased it, it's incredibly hard to move once put back
together. So, it's of no use. I also made sure that there was almost no
slack in the cable when the derailleur is in the small chainring (I used
the fourth hand tool to take out the slack).

Is this a simple matter of perhaps creating even less or no slack in the
cable when the derailleur is in the small chainring? Or could the shifter
be somehow broken? Or do I need to get a new front barrel adjuster? Or is
there something else I should be looking at?

Thanks,

Bob
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  #2  
Old July 26th 05, 10:11 PM
Chris Walters
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Default Problems with triple chainring front derailleur (Ultegra)

Bob in CT wrote:
I adjusted the front Ultegra derailleur on my Lemond bike by using the
following:

http://www.parktool.com/repair_help/...railleur.shtml


Is this a simple matter of perhaps creating even less or no slack in
the cable when the derailleur is in the small chainring? Or could
the shifter be somehow broken? Or do I need to get a new front
barrel adjuster? Or is there something else I should be looking at?

Thanks,

Bob



Yep, a tiny little slack, line up the travel stop, and you're there. Then
adjust the external travle, and use the barrel adjuster to get the trimming
on the middle ring. Just watch that you route the cable correctly on the
grip, or you'll have horrible problems getting the shifting perfect (I know
coz I got it "wrong" even though it looked "right" from the instruction
leaflet, and in the end had to take it into the LBS, who laughed in a
friendly and caring way, while saying that they have no end of Ultegra
triples with wrong cable routing and poor shifting... to my disgust it took
less than a minute to get it perfect... and they had so much of a chuckle
that they wouldn't charge :-)

Good luck,
Chris

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  #3  
Old July 26th 05, 10:44 PM
Bob in CT
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Default Problems with triple chainring front derailleur (Ultegra)

On Tue, 26 Jul 2005 22:11:48 +0100, Chris Walters wrote:

Bob in CT wrote:
I adjusted the front Ultegra derailleur on my Lemond bike by using the
following:

http://www.parktool.com/repair_help/...railleur.shtml


Is this a simple matter of perhaps creating even less or no slack in
the cable when the derailleur is in the small chainring? Or could
the shifter be somehow broken? Or do I need to get a new front
barrel adjuster? Or is there something else I should be looking at?

Thanks,

Bob



Yep, a tiny little slack, line up the travel stop, and you're there. Then
adjust the external travle, and use the barrel adjuster to get the
trimming
on the middle ring. Just watch that you route the cable correctly on the
grip, or you'll have horrible problems getting the shifting perfect (I
know
coz I got it "wrong" even though it looked "right" from the instruction
leaflet, and in the end had to take it into the LBS, who laughed in a
friendly and caring way, while saying that they have no end of Ultegra
triples with wrong cable routing and poor shifting... to my disgust it
took
less than a minute to get it perfect... and they had so much of a chuckle
that they wouldn't charge :-)

Good luck,
Chris


Thanks, Chris. I'll also take a look at the cable routing, as I also
replaced my handlebars (went wider) so I did reroute everything.

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