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PostPosted: Thu Jul 22, 2010 6:28 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8221
Location: New Forest, UK
All Campag 8 speed stuff is interchangeable.

You won't get a smaller chainring onto the crank spider - 39T is the smallest it will got to (otherwise the bolts would be outside the teeth :D )

You can get a triple converter from Spacycles (TA ring) - this is a 39T ring with extra holes which allows you to hang a 3rd inner chainring off it. Otherwise you are stuck with buying a new later compact crank. Don't even think about buying the MTB cranks - they go for daft money these days!

39/26 isn't too bad a gear for most hills, provided you are reasonably fit.

You'll need a BB around 111mm, but fortunately they are fairly easy to get hold of.


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PostPosted: Mon Jul 26, 2010 12:22 pm 
Dirt Disciple

Joined: Mon Jul 19, 2010 1:30 pm
Posts: 10
Thanks again, showing my newbness!

I have a Chorus double crankset from 1991 so I've learned that it will have the pre-ISO Campagnolo taper which is a bit like JIS (but not quite) . :roll:

Would a new Centaur 111mm BB fit? because it states on the Centaur spec:

"Also fits 1993 and later Athena and pre-1995 Record and Chorus cranks."
But surely this is an ISO fit?

I know the ISO/JIS situation is debated ad-infinitum which makes it all the more confusing! Sorry for bringing it up again!

After reading all the opinions it looks as if crossmatching the taper standards actually works but can effect your chainline either way by Xmm. Maybe this isn't too much to worry about on a double or triple crankset?


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PostPosted: Wed Oct 27, 2010 12:48 pm 
Dirt Disciple

Joined: Mon Jul 19, 2010 1:30 pm
Posts: 10
Got there in the end! thanks for the advice!

Jon


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