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Campy Chorus 10sp Mis Shifting FD

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Campy Chorus 10sp Mis Shifting FD

Old 09-22-08, 04:23 PM
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tanguy frame
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Campy Chorus 10sp Mis Shifting FD

Sometimes, when shifting from large to small chainring, the chain slips between the chainrings and the cranks spin with no drive. The setup is campy chorus front and rear, 50-34 front, 12-25 rear. The bike ahs about 2800 miles on it.

Thanks in advance
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Old 09-22-08, 05:30 PM
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Are the brifters Chorus too? If so, you aren't giving the "mouse ear" enough clicks to complete the shift. My 10-speed Chorus Ergos require three clicks to go from the large to the middle (mine is a triple) chainring.
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Old 09-22-08, 06:27 PM
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Are you using a 10-speed chain with a 10-speed crankset?
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Old 09-22-08, 06:45 PM
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Originally Posted by HillRider View Post
Are the brifters Chorus too? If so, you aren't giving the "mouse ear" enough clicks to complete the shift. My 10-speed Chorus Ergos require three clicks to go from the large to the middle (mine is a triple) chainring.

You have major cable tension problems if thats the case.
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Old 09-22-08, 06:47 PM
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You rarely want to tell someone it's the limit screws. But, it sounds like it's the limit screw in this case.
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Old 09-22-08, 07:34 PM
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Originally Posted by MadeInItaly View Post
You have major cable tension problems if thats the case.
How so? I use either 3 or 4 clicks going from the big ring to the inner ring on my Record double. I don't have a Campy triple but 3 clicks sounds about right to me.
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Old 09-22-08, 07:36 PM
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Originally Posted by MadeInItaly View Post
You rarely want to tell someone it's the limit screws. But, it sounds like it's the limit screw in this case.
Which limit screw, and how would it effect a shift from the big to middle chainring? Or are you a troll?
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Old 09-22-08, 07:51 PM
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Originally Posted by Al1943 View Post
Are you using a 10-speed chain with a 10-speed crankset?

I think this is a good question. If the OP is using a crankset intended for 10 speed, a 10 speed chain shouldn't slip between the chainrings no matter what. A "9 speed" crankset with a 10 speed chain could cause the problem. Or maybe a "10 speed" crankset is being used with one of the new 11 speed chains; that could cause it, too-

Last edited by well biked; 09-22-08 at 08:09 PM.
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Old 09-22-08, 08:18 PM
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Originally Posted by Al1943 View Post
How so? I use either 3 or 4 clicks going from the big ring to the inner ring on my Record double. I don't have a Campy triple but 3 clicks sounds about right to me.
I have 3 Campanolo bikes. They are all one click to drop from the large to small CR. 06 Centaur pre QS and 2 08 QS Chorus.
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Old 09-22-08, 08:26 PM
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Originally Posted by Al1943 View Post
Which limit screw, and how would it effect a shift from the big to middle chainring? Or are you a troll?

How does suggesting he adjust his limit screws make me a troll? B
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Old 09-22-08, 10:08 PM
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That really doesnt sound right to have to click that much between chainrings. I just installed my Veloce Double setup and adjusted exactly as the manual describes, its 1 click down and 1 click back up. Before it was adjusted properly it took a few clicks to get it to the right spot, now its smooth like butter.

If I had to click that much to change gears I would think something was definitely wrong.
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Old 09-23-08, 12:13 AM
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Originally Posted by Rogue Leader View Post
That really doesnt sound right to have to click that much between chainrings. I just installed my Veloce Double setup and adjusted exactly as the manual describes, its 1 click down and 1 click back up. Before it was adjusted properly it took a few clicks to get it to the right spot, now its smooth like butter.

If I had to click that much to change gears I would think something was definitely wrong.

Ya think..
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Old 09-23-08, 04:55 AM
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The chain is slipping between the chainrings. That should never happen, and won't happen if the spacing between the chainrings is close enough to prevent it. The chain is too narrow for the crankset.
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Old 09-23-08, 06:18 AM
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Apparently some of you aren't that familiar with Campy's "micro shifting" front shifting. It was the standard on all pre-QS groups and is now only on Record and Chorus post-QS. It is basically a ratcheting arrangement, not a strict "indexing" system like all Shimano and post-QS Centaur and below. The benefit is that it provides the ability to trim the front derailleur over any and all chainrings on both double and triple cranks and is pretty tolerant of any make crank and front derailleur. So multiple clicks to go between any two chainrings is normal for it. Keep in mind you can make multiple clicks with one sweep of the mouse ear so it's not like you have to push it more than once to complete the shift.

And before anybody jumps in, yes, the mechanism that Campy now uses to give one-click front shifting (and one-at-a-time upshifting in QS rear brifters) is really called "Escapment" but "QS" is the generic name for all of their post-2006 groups.
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Old 09-23-08, 06:29 AM
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Originally Posted by HillRider View Post
Apparently some of you aren't that familiar with Campy's "micro shifting" front shifting. It was the standard on all pre-QS groups and is now only on Record and Chorus post-QS.
I just installed '09 Campy Centaur on my Pinarello, with a 50/34 compact double. It has the "micro shift" feature on the front shifter. But more to the point, I just checked to see if the chain can physically slip between the chainrings as the OP says is happening, and it can't, the chainring spacing is too close for this to happen. I really think Al1943 hit on it earlier when he mentioned the chain/chainring compatibility question. It seems the OP's chain is too narrow for the cranks; again, on my 10 speed Campy compact double setup, it's physically impossible for the OP's problem to happen-
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Old 09-23-08, 07:36 AM
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Originally Posted by HillRider View Post
Apparently some of you aren't that familiar with Campy's "micro shifting" front shifting. It was the standard on all pre-QS groups and is now only on Record and Chorus post-QS. It is basically a ratcheting arrangement, not a strict "indexing" system like all Shimano and post-QS Centaur and below. The benefit is that it provides the ability to trim the front derailleur over any and all chainrings on both double and triple cranks and is pretty tolerant of any make crank and front derailleur. So multiple clicks to go between any two chainrings is normal for it. Keep in mind you can make multiple clicks with one sweep of the mouse ear so it's not like you have to push it more than once to complete the shift.

And before anybody jumps in, yes, the mechanism that Campy now uses to give one-click front shifting (and one-at-a-time upshifting in QS rear brifters) is really called "Escapment" but "QS" is the generic name for all of their post-2006 groups.

I guess you didn't read my post. I have both QS and pre QS. They both drop the chain with one click. I guess I'm just lucky. Or a real good mechanic.
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Old 09-23-08, 09:28 AM
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Originally Posted by MadeInItaly View Post
I guess you didn't read my post. I have both QS and pre QS. They both drop the chain with one click. I guess I'm just lucky. Or a real good mechanic.
I did read your post and I don't see how it can work that way. Don't you have any trim positions over the large ring?
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Old 09-23-08, 09:31 AM
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Yes you can trim. But I can also drop my chain in one full push of my left thumb. Just like it goes to the big CR with one swipe.
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Old 09-23-08, 09:53 AM
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It's kinda odd that the OP has yet to chime in on what year shifters he has. I'm interested if you see this.
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Old 09-23-08, 10:10 AM
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Originally Posted by MadeInItaly View Post
Yes you can trim. But I can also drop my chain in one full push of my left thumb. Just like it goes to the big CR with one swipe.
Well, yeah, I know that. I said in an above posting you can push the mouse ear far enough to complete the shift in one motion. In fact with a triple crank, you can go from the big to the granny ring in one sweep.

Going the other way, you can sweep the inner lever to upshift from the granny to the middle or from the middle to the big ring in one motion too.

You are still going through several "clicks" while doing either.
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Old 09-24-08, 12:44 PM
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sorry for delay.
I have 10sp chorus compact crank 50-34, 10 sp chorus chainrings and 10sp chorus chain.
The phenomenon is when shifting from large chainring to small, the FD doesn't come down far or fast enough to push the chain completely onto the small chainring. It dwells in the space between the chainrings, allowing the crank to rotate without grabbing any teeth, so no drive force on rear wheel.

This usually happens at slow speeds. The limit scerws are fine. The problem is intermeiient.
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Old 09-24-08, 08:09 PM
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Originally Posted by tanguy frame View Post
sorry for delay.
I have 10sp chorus compact crank 50-34, 10 sp chorus chainrings and 10sp chorus chain.
The phenomenon is when shifting from large chainring to small, the FD doesn't come down far or fast enough to push the chain completely onto the small chainring. It dwells in the space between the chainrings, allowing the crank to rotate without grabbing any teeth, so no drive force on rear wheel.

This usually happens at slow speeds. The limit scerws are fine. The problem is intermeiient.

That's a puzzler to me. As I said earlier, I checked the chainring spacing on my Campy 10 speed compact crankset. If the chain drops off the big ring to the inside, there is literally no way it can do anything but engage the smaller chainring, there's not room for it to do anything else. In my opinion, all this talk about how many clicks it takes to make the shift is completely irrelevant in your case, if the chain comes off the big ring at all and falls to the inside, as long as it doesn't overshift to the inside and fall off, it shouldn't be able to do anything but grab the chainring teeth and engage. I think you should take it to your LBS, something's screwy-
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Old 09-25-08, 07:08 AM
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"Sometimes, when shifting from large to small chainring, the chain slips between the chainrings and the cranks spin with no drive."

I have had EXACTLY the same problem with a 2007 Campag Veloce setup, (10 speed compact, everything from new and as it should be), after maybe 1200 miles or so. (Later also developed problem shifting from small ring to big). Seems to be cured now following careful adjustment of the front mech cable tension at the adjuster on the down tube. Also helpful to keep the front mech properly lubed.
[Note: the chain does not fall between the rings as much as not locate on the inner ring - at first I thought the freewheel was malfunctioning - quite worrying!]
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Old 09-25-08, 09:17 AM
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Strangest phenomenon to be brought up in a while here. I am of well biked's opinion but two cases of this happening is - well - just weird.
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Old 09-25-08, 09:27 AM
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You may need to turn the low limit screw out a fraction of a turn, but as already mentioned, you should also push the thumb button all the way down when shifting to the little ring. This is still unusual however. I've been using an '08 Chorus 50/34 all season and never had a problem like that, with either a Campy chain or KMC chain. I've also deliberately only pushed two clicks of the four required for a QS front derailleur and never failed to execute a perfect shift. Are you using a standard (non QS) FD, a compact FD, or the '08 std/compact QS model?

Edit: I didn't read all the previous replies, but it does make a difference if you've got escape shifters. There's only 1-click to make the shift. I would then suspect either a lowlimit screw issue or a cage angle problem.

Last edited by DaveSSS; 09-25-08 at 09:31 AM.
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