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Campy Downtube Shift Lever ?

Old 07-26-21, 12:03 AM
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frogman
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Campy Downtube Shift Lever ?

On my 84 Trek 770 I have the original setup with Campy Record gear. It has friction down tube shifters. I swapped the original rear wheel with a wheel with a campy 10 speed freehub. Left everything else alone and the original Campy friction shift levers shift beautifully. I am thinking about swapping a 10 speed indexed shift lever on the right side for the rear cassette to see how it works. The only problem is there a campy indexed 10 speed downtube shift lever ? If not possible I am not going to be dissapointed really, it shifts nicely as it is. It would just be icing on the cake.
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Old 07-26-21, 12:31 AM
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Campagnolo has the Syncro II shifters, but they may be limited to 6 and 7 speed.

They also made "retrofriction" shifters, and some of their indexed shifters may have a retrofriction mode.

They have 10 and 11 speed bar end shifters which are quite cool, used primarily for TT/Tri. More speeds? The unique thing about Campy 11s shifters (and maybe earlier ones) is that they use a ratchet similar to the brifters, and always self center.

Dura Ace has a 10 speed DT shifter. And, 11 speed bar end shifters. More speeds? One may be able to adapt the bar end shifters to the DT.

Microshift has DT shifters up to 10 speed, and bar end shifters for 10, 11, and 12 speed (plus conversion shifters to use MTB derailleurs and SRAM derailleurs).
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Old 07-26-21, 12:37 AM
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Thanks for the info. Does Microshift make 10 speed downtube shifters compatible with Campy ?
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Old 07-26-21, 02:21 AM
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Dia Compe makes 10sp shifters and I assume they're designed to work with Shimano. If it's not perfect you could get a Jetk Shiftmate.

Jtek ShiftMate Gear Shifting Adapter for Shimano Campagnolo and SRAM components
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Old 07-26-21, 03:53 AM
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Originally Posted by frogman View Post
Thanks for the info. Does Microshift make 10 speed downtube shifters compatible with Campy ?
Interesting question...
https://en.wikibooks.org/wiki/Bicycl...ing_Dimensions

It looks like that page needs a little updating and expanding.

However, according to the table: Shifter Cable Pull,
Campagnolo 10s pulls 2.8mm
Tiagra 4700 10s pulls 2.8mm

I'm not sure if that is accurate enough, but it is probably close.

And, Microshift does sell Tiagra 4700 10s compatible shifters:
https://www.microshift.com/models/sl-d10b/

Whew, I'm only finding them in Japan, and not exactly cheap.

https://shop.circles-jp.com/en/produ...tube-shifter-1

=============================================================

Ok, so using the data from the wiki page above, I tried to do a quick consistency test on derailleur cable pull. It would be nice to have an extra significant figure. But, my calcs show that the Tiagra shifter likely pulls about 2.825mm of cable, slightly more than the Campy that pulls about 2.748mm.

Or about .69 mm difference across the cassette. That may be within what the derailleur and chain can compensate for.

Last edited by CliffordK; 07-26-21 at 04:55 AM.
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Old 07-26-21, 10:29 AM
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Originally Posted by CliffordK View Post
Interesting question...
https://en.wikibooks.org/wiki/Bicycl...ing_Dimensions

It looks like that page needs a little updating and expanding.

However, according to the table: Shifter Cable Pull,
Campagnolo 10s pulls 2.8mm
Tiagra 4700 10s pulls 2.8mm

I'm not sure if that is accurate enough, but it is probably close.

And, Microshift does sell Tiagra 4700 10s compatible shifters:
https://www.microshift.com/models/sl-d10b/

Whew, I'm only finding them in Japan, and not exactly cheap.

https://shop.circles-jp.com/en/produ...tube-shifter-1

=============================================================

Ok, so using the data from the wiki page above, I tried to do a quick consistency test on derailleur cable pull. It would be nice to have an extra significant figure. But, my calcs show that the Tiagra shifter likely pulls about 2.825mm of cable, slightly more than the Campy that pulls about 2.748mm.

Or about .69 mm difference across the cassette. That may be within what the derailleur and chain can compensate for.

The Wiki table spells out the different pulls nicely. Thanks.
I don't want to spend the high price for the Microshift shifters It might be worth trying the Tiagra..................
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Old 07-26-21, 10:31 AM
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Originally Posted by Lazyass View Post
Dia Compe makes 10sp shifters and I assume they're designed to work with Shimano. If it's not perfect you could get a Jetk Shiftmate.

Jtek ShiftMate Gear Shifting Adapter for Shimano Campagnolo and SRAM components

I may try the ShiftMate. Easy to try. Thanks
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Old 07-26-21, 10:48 AM
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Read this first...

Campagnolo 10 Speed index down tube shifter conversion

John
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Old 07-26-21, 11:09 AM
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Originally Posted by frogman View Post
The Wiki table spells out the different pulls nicely. Thanks.
I don't want to spend the high price for the Microshift shifters It might be worth trying the Tiagra..................
The Tiagra 4700 is a unique mixed spec for Shimano. 10-speed road shifters + 11-speed road derailleur.

I don't believe they include the downtube or bar end shifters.

Now this is interesting...
https://www.amazon.com/microSHIFT-10.../dp/B07HJGCDK1

I think the index kit may work with their 8-speed shifters which are much cheaper.

====================================================

You know, I think Microshift may use the same shifters for downtube, bar end, and thumbie shifters.

With that in mind, the first generation Campagnolo 10s bar end shifters may work as DT shifters. I wouldn't do the modern stuff, but the 1st gen should work. Perhaps requiring some cable routing mods. I may have a pair of those somewhere.



A little different shape than other DT shifters.
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Old 07-26-21, 11:56 AM
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Originally Posted by 70sSanO View Post

Thanks for the info John ! I would like to try this. Now to find some Campy 10 speed bar end shifters..............
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Old 07-31-21, 05:40 PM
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I doubt that your Super Record rear derailleur will index reliably with any shifter.

--Shannon
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Old 07-31-21, 05:44 PM
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Originally Posted by ShannonM View Post
I doubt that your Super Record rear derailleur will index reliably with any shifter.

--Shannon
Well, there is one way to find out. Try it........
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Old 07-31-21, 07:13 PM
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Originally Posted by ShannonM View Post
I doubt that your Super Record rear derailleur will index reliably with any shifter.

--Shannon
Originally Posted by frogman View Post
Well, there is one way to find out. Try it........

...I have been considering a similar project, to marry some siw speed DT Shimano indexing shifters with a Campy New Record rear derailleur. I haven't done it yet because other things have taken my time. One thing you need to consider is that the reason Shimano indexing works so well is the built in float on their top pully for all their indexed shifters. Sometimes they are marked "Centeron" on the pully, and sometimes not. If you have one somewhere, wiggle the top pully back and forth a little, and you will see what I'm talking about.

The Centeron pully is basically one with the same bushing width (side to side) as the lower pully, but the pully itself is narrower. This provides the float. In turn, this makes the indexing work better.

Fortunately, you can find an old, junked out Shimano rear derailleur from the early indexing era, and the bushings will fit the New Record derailleur bolts. I think they will also fit on early friction Super Record. So that will give you float. The barrel adjuster thingy is a little tougher to install, and requires some modification with a tap and file. It might work without a barrel adjuster, or with one installed inline farther up toward the shifters.
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Old 07-31-21, 08:15 PM
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If I'm remembering a real thing, I remember one guy on an email list that made it work, sorta, using an SR rear derailleur, a floating upper pulley, a Shimano SIS freewheel, and a Suntour Accushift lever, or some sort of weirdo kit bash like that.

Maybe there were Syncro I inserts for SR derailleurs? Again, may be false memory, and even if they existed, you can't find one, and even if you did, that little piece of plastic would be like 300 bucks and wouldn't work.

Bottom line, the OP needs a new rear derailleur. (Or Simplex retrofriction levers, with their micro-tiny cable pull and general awesomeness.)

--Shannon
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Old 07-31-21, 08:33 PM
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Originally Posted by ShannonM View Post
Or Simplex retrofriction levers, with their micro-tiny cable pull and general awesomeness.

--Shannon
Best friction shifters ever. I bought a set of the Mavic branded open loop for $5 in 87. I should have bought a dozen of them. I used them until 2015.

John
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