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PostPosted: Fri Nov 09, 2012 12:20 pm 
Old School Hero
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Joined: Mon Oct 15, 2012 11:12 pm
Posts: 200
Location: Herts/Essex border
I wish to purchase a new Campagnolo 10 speed rear derailleur. I am being offered a Short or Medium which presumably relates to the arm length which then relates to the number of chainring/cassette teeth you wish to cover. Also possibly the largest cassette cog you can mount.

Does anyone have any specifics ?

Many thanks.


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PostPosted: Fri Nov 09, 2012 3:18 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
Count up the total tooth difference it has to handle. This will then tell which mech to choose. Triples or wide range cassettes definitely need the medium cage.


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PostPosted: Fri Nov 09, 2012 8:54 pm 
Retro Guru

Joined: Mon Feb 01, 2010 8:57 pm
Posts: 774
The biggest sprocket size you can use with either is 29, and the short cage will work with 34x50 with 13-29 i.e. totalgear capacity of 32. Any more and you'll likely need the medium cage.


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PostPosted: Fri Nov 09, 2012 9:09 pm 
Old School Hero
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Joined: Mon Oct 15, 2012 11:12 pm
Posts: 200
Location: Herts/Essex border
Many thanks Monty Dog and Hamster. Just the info I needed.

Most grateful.


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PostPosted: Fri Nov 09, 2012 10:42 pm 
Gold Trader
Gold Trader
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Joined: Wed Jun 20, 2007 11:19 pm
Posts: 7006
Location: Odense, Denmark
I ran medium cage when I was running 13-29 because that's what Campag recommended.

Not tried a short one - but my understanding was that short cage only went up to 26T.

And long cage is for triples.


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PostPosted: Mon Nov 12, 2012 10:37 pm 
Retro Guru

Joined: Mon Feb 01, 2010 8:57 pm
Posts: 774
Lots of folks have successfully run a short cage mech with a 29 sprocket, despite what the Campagnolo tech docs say. Have a Centaur short cage mech on one of my CX bikes and grateful for the 29 sprocket when riding offroad on the Southdowns on Sunday!


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