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-   -   Campy shifters and shimano RD (https://www.bikeforums.net/showthread.php?t=1095893)

bmthom.gis 01-25-17 10:47 PM

Campy shifters and shimano RD
 
Okay friends,
I'm restomodding (sort of) a Schwinn Prologue. It came with mostly DA 7400 but with Suntour hubs. A friend just gave me some campy hubs laced to Mavic rims.
Quick question: the DA 7400 RD wouldn't happen to work with 8 speed campy indexed shifting would it?

brandon98 01-26-17 07:37 AM

8 Speed Campy is an orphan.

5.0mm cog spacing (same as Shimano 7 speed)

More here:
Shimano cog spacing, derailleur, and shifter compatibility

ypsetihw 01-26-17 07:58 AM

unfortunately no, it won't work, unless you run it on friction, then it *might* if you can find a chain that plays nicely with the different parts. now that I think of it, make sure the campy chain has the same pitch.

Ex Pres 01-26-17 08:03 AM

Campy 8 speed will shift your RD at 6.66mm cog spacing. That's not even close to anything.
You'll need Campy 11 to shift old DA (74xx) in either 7 or 8 speed mode.
Hubbub cable routing gives you 5.5mm spacing, good for an old standard spaced 6 speed.
It's all here: SHIMERGO

Grand Bois 01-26-17 08:14 AM


Originally Posted by ypsetihw (Post 19337199)
now that I think of it, make sure the campy chain has the same pitch.

???

ypsetihw 01-26-17 08:55 AM


Originally Posted by Grand Bois (Post 19337219)
???

I know the campy chains are narrower 5.5mm vs 5.6mm for shimano, I just wasn't 100% sure they have the same pitch (spacing between the pins), but it appears they do.

this article has great info: https://cyclingtips.com/2014/10/mixi...d-what-doesnt/

bmthom.gis 01-26-17 10:04 AM

Thanks. So in other words...just buy a darn Campy 8 speed RD as well. I was hoping I wouldn't have to, but that's ok.

bmthom.gis 01-26-17 10:13 AM

I'm overwhelmed with data at this point. I have the 8 speed campy wheels, so Campy is happening. What are my options?

Here's a pic of her next to my friend's Voyageur (which was a $9 Goodwill find...punk!)
http://i1372.photobucket.com/albums/...psjsey21hd.jpg

ypsetihw 01-26-17 12:19 PM

you could just run it on friction, and then the shimano RD should work. you won't be able to use the indexing, but with 8 speeds that's not a huge issue. I would try it before you sink money into it, but at least the RDs are fairly inexpensive compared to the rest of the system. get a KMC 8 speed chain for like $15 and don't worry about it, they are cross compatible, and will shift perfectly on friction.

the saddle is crap (those vaders are like $10 on ebay) but the hoods and brakes look updated, and the pro 4 tires are good rubber. just looks like it needs pedals, cables, bar tape, and a saddle of your choice (and the chain of course).

Grand Bois 01-26-17 01:19 PM


Originally Posted by ypsetihw (Post 19337305)
I know the campy chains are narrower 5.5mm vs 5.6mm for shimano, I just wasn't 100% sure they have the same pitch (spacing between the pins), but it appears they do.

this article has great info: https://cyclingtips.com/2014/10/mixi...d-what-doesnt/


All are 1/2".

bmthom.gis 01-26-17 01:50 PM


Originally Posted by ypsetihw (Post 19337879)
you could just run it on friction, and then the shimano RD should work. you won't be able to use the indexing, but with 8 speeds that's not a huge issue. I would try it before you sink money into it, but at least the RDs are fairly inexpensive compared to the rest of the system. get a KMC 8 speed chain for like $15 and don't worry about it, they are cross compatible, and will shift perfectly on friction.

the saddle is crap (those vaders are like $10 on ebay) but the hoods and brakes look updated, and the pro 4 tires are good rubber. just looks like it needs pedals, cables, bar tape, and a saddle of your choice (and the chain of course).

Saddle is definitely crap. It's what was on the bike when I picked it up. It'll be changed before I even bother adjusting the seatpost height.

I have a set of 9 speed DA bar ends I thought about putting on and running as friction, but I kind of do want ergos. 8 speed Campy RDs aren't cheap though

Ex Pres 01-26-17 02:58 PM


Originally Posted by bmthom.gis (Post 19338172)
I have a set of 9 speed DA bar ends I thought about putting on and running as friction, but I kind of do want ergos. 8 speed Campy RDs aren't cheap though

Now those 9s DA bar ends will run the 74xx series RDs in 8s mode, but Shimano 8s spacing is 4.8mm and Campy is 5.0mm. If you set it perfect on cog 4/5, then the max you're out is about 0.6mm-0.8mm on either end of the cogset. It's not Ergo, but it "may" solve your immediate cost issue.

bmthom.gis 01-26-17 03:33 PM


Originally Posted by Ex Pres (Post 19338343)
Now those 9s DA bar ends will run the 74xx series RDs in 8s mode, but Shimano 8s spacing is 4.8mm and Campy is 5.0mm. If you set it perfect on cog 4/5, then the max you're out is about 0.6mm-0.8mm on either end of the cogset. It's not Ergo, but it "may" solve your immediate cost issue.

Hmm. Something to think about. I've put out a few feelers to people I know who might have some campy stuff. I'm not in a super rush, but it will be nice once this build is finished!

noglider 01-26-17 04:17 PM

Pitch is distance between the links (pivots) and is always 1/2" as Grand Bois says. By pitch, you must have meant width.


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