Adjusting Campy Centaur rear der

A bent derailleur hanger can cause the problem you report, as can a mismatch between the derailleur
and shifter.

A 9-sp chain may help but I'd check out other things first, especially the derailleur hanger. It's
easy enough.

Let us know what you discover.

Mike Yankee

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Mike Yankee wrote

A bent derailleur hanger can cause the problem you report, as can a mismatch between the derailleur
and shifter.

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I thought about that at first and looked at the hanger for wrinkled or chipped paint. But its not
off by much so it may not show.

I'll pick up a park der hanger gauge just to make sure. I have a bianchi that I can use that on so
it is worth it for me to buy one.

I posted my message to see if sloppy indexing was a problem for others using that group.

Mike

Hi Mike,

MLee388407 said:

Hi Group

I just assembled a campy centaur group onto my frameset. Im having some problem with the
indexing system in the rear. It seems as I get the rear der to line up on the larger cogs the
smaller ones are out of line. Getting the smaller ones to line up throws off the larger ones. I
was surfing on www.roadbikereview and this problem had occured to another user.

If you still have the instructions, they are actually helpful. Don't align the rear indexing
starting with the smallest cog. This works with Shimano but with Campy, you have to get the chain
perfectly alinged on about the fifth cog down. Once you do, it will shift cleanly up and down.

Note, if you are using a brand new Campy chain, expect some drive train noise until it breaks in,
especially running the big chain ring and cogs on the inside of the cassette (nearest spokes).

Quoted message said:

roadbikereview.comPRD 28200 2Open ↗ 497crx.aspx

Someone also posted that a sram 89r chain would help with the problem.

The PC-89R is the only road chain I use and I have had excellent results with it and Campy 9s. But
other chains work equally well such as IRD's and Wipperman. Also note that the PC-59 and PC-69 work
exactly like the PC-89R but less expensive.

Quoted message said:

Anyone with any thoughts or suggestions to alleviate my situation? TIA

Well, I hope this helps a little.

Terry

Quoted message said:

Mike

Terry and Mike

I got it figured out just a minute ago. I ran across this problem before when my buddy gave me his
kids bike because he couldnt get it to index correctly. He had routed the rear der wire incorrectly,
not following the groove engraved on the pinch clamp. I released the der cable and noticed a kink
and knew that wasnt right and the wire should be straight. Right away I knew where I went wrong and
rerouted the cable under the groove. It now works perfectly. Thanks again Terry and Mike.

Mike

mlee-<< I just assembled a campy centaur group onto my frameset. Im having some problem with the
indexing system in the rear. It seems as I get the rear der to line up on the larger cogs the
smaller ones are out of line. Getting the smaller ones to line up throws off the larger ones.

Quoted message said:

Quoted message said:

<BR><BR>

Der cable UNDER the fixing bolt and plate, not thru it in any way or above it??

As long as the chain is a 9s one and the inner wire is afixed to the rear der properly, it will
shift fine.

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

mlee-<< He had routed the rear der wire incorrectly, not following the groove engraved on the pinch
clamp. >><BR><BR>

bing, bing, bing, we have a winner!!!

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

mlee-<< He had routed the rear der wire incorrectly, not following the groove engraved on the
pinch clamp. >>

====

Thanks Peter, In fact IIRC Sheldons page had something about early Dura Ace being able to be routed
two different ways to achieve two different cable pull lengths.

Mike