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Older steel frame, special shifter ferrule needed?

Old 10-09-13, 05:31 PM
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Older steel frame, special shifter ferrule needed?

I have an older (89-91 or so Concorde Aquila) SLX steel frame that has a chainstay cable stop that is round and has a smaller hole (with no slit in it) than I'm used to. I'm trying to build it up with modern 10 speed campagnolo (mostly centaur) parts. When trying to run the shifter cable, it comes with a stepped ferrule for smaller chainstay cable stops, but this stop is so small that basically a corner of the stepped ferrule kind of fits in there (and the cable housing alone doesn't really fit either).

Is there a special ferrule I should be using for this kind of situation?

I can't imagine stripping the outer housing so that the wire coil will fit in the stops will make the indexing work great. Should I be doing something else?

thanks,
paul
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Old 10-09-13, 06:14 PM
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Is it one of these Cinelli "diver's helmet" style cable stops?



If so, a 4mm step-down ferrule should work:

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Old 10-09-13, 08:00 PM
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Yeah, that's the stop I've got. I have a step down ferrule that came with my campagnolo cables. Don't know if it's not enough of a step down or what. Maybe I'm just not getting it lined up or pushing it in hard enough. It's like it almost fits, but just not quite. I don't suppose giving it a little squeeze with the crimper part of my cable cutters would help. Probably just deform it and make it worse, right?
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Old 10-09-13, 08:35 PM
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Take a needle file, round, and clean out the paint from the cable stop. Andy.
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Old 10-10-13, 04:30 AM
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The stop is chrome and it didn't look like there was any dirt or build up in it, but I can run a brush through it again to make sure. I measured my step ferrule and the smaller bit is the same as what Mr. Thompson suggested at 4 mm. It goes in a little way, but stops and a bump from the side knocks it out. I wonder if I run the cable through it and get the housing set up if I can get it in the rest of the way with my fourth hand.
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Old 10-10-13, 06:00 AM
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Use a flat file to slim down the 4mm step down portion. If that doesn't work, shoot me a pm. I think I have a couple of step downs that have a slightly smaller nose.
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Old 10-10-13, 06:47 AM
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Thanks, didn't consider trying to thin down the nose. The teeth of my calipers are too small to fit into the cable stop so I don't know how much it has to be slimmed down, but I can't imagine it's all that much. I wonder if some 100 grit sandpaper around the whole nose would take it down more evenly (take a lot longer though).
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Old 10-10-13, 09:30 AM
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Originally Posted by himespau
The teeth of my calipers are too small to fit into the cable stop so I don't know how much it has to be slimmed down, but I can't imagine it's all that much.
I measure the ID of an unpainted Cinelli chainstay cable stop as 4.2mm so it wouldn't take much paint or debris to make a tight fit. A couple passes with a needle file ought to be enough to clear it out, though.
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Old 10-10-13, 09:44 AM
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Hmmm, don't have a needle file, but it's always good to have an excuse to buy a new tool (if only my wife agreed).
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Old 10-10-13, 10:37 AM
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If you have an electric drill, or better yet a drill press, just put the large end of the ferrule in the chuck and take the small end down with a file or some sandpaper with it turning at a fairly slow speed. Take you time and check the fit with just short blasts in the drill. Gives it a real professional looking result.
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Old 10-10-13, 12:38 PM
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Originally Posted by Crankycrank
If you have an electric drill, or better yet a drill press, just put the large end of the ferrule in the chuck and take the small end down with a file or some sandpaper with it turning at a fairly slow speed. Take you time and check the fit with just short blasts in the drill. Gives it a real professional looking result.
Hmmm, good idea. Right now the drill's at my work, but might have to bring it home to try that.
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Old 10-10-13, 08:16 PM
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Thanks guys. Ran the nipple end of my ferrule over the file turning with every stroke for a minute or so and it fit right in, so that's good. Now I need to figure the appropriate length for the housing to get a nice curve back there. Back to the big blue book.
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Old 12-17-21, 07:08 PM
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This should work. Description: Campagnolo Stepped Gear Ferrule 4mm. It should take 4mm cable which is what the coiled wire gear cable is on old steel bikes. Or you can use modern SHIFT cable and housing which is 4mm. Brake cable housing is 5mm and probably won't fit. https://www.condorcycles.com/product...d-gear-ferrule These are extremely hard to find. Folks want $10+ each plus shipping on Ebay. This company's price as I write this, is $2.99 each and $5 US shipping. So buy some extras.
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Old 12-18-21, 07:49 AM
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Appears to be a common problem. Ran into the same with the De Rosa Build. Start of #42 of this thread, Help me build a 1990 De Rosa Pro - Page 2 - Bike Forums
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Old 12-30-21, 02:50 PM
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I have the same issue on two Merckx I'm building up right now. However the ID of the braze-on is 3.5mm so the standard 4.5mm and 4mm step downs don't fit. =(
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Old 12-02-23, 04:07 PM
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Originally Posted by Jaredn
I have the same issue on two Merckx I'm building up right now. However the ID of the braze-on is 3.5mm so the standard 4.5mm and 4mm step downs don't fit. =(
what did you do to corect the situation?
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Old 12-02-23, 04:35 PM
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Over the years I have built up a selection of ferrules useful for building bikes. When I change cables, I never discard the ones from the cables I am changing. I have a bag of ferrules from cable changes accumulated over almost 50 years.
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Old 12-02-23, 05:27 PM
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Originally Posted by alcjphil
Over the years I have built up a selection of ferrules useful for building bikes. When I change cables, I never discard the ones from the cables I am changing. I have a bag of ferrules from cable changes accumulated over almost 50 years.
that's a good idea

i ordered last night a couple campy step downs and a couple shimano sp40 ferrulus step down. hope on or the other works, and i found a link to some rat tail files if i need them. i am building up a serotta performance bike frame and fork. the model was called the speciale, in silver blue. 52x53cm. excited. r8000 shimano build 👍 the frame/fork is from 88'/89'
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