Join Date: Aug 2005
Location: New Hampshire
Bikes: Gunnar Sport, Soma Double Cross Disc
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Yes, any 9 or 10 speed Campy rear derailleur should work on your setup. You may be able to get away with keeping your existing RD and chain, but you won't know until you try it. You may lose the ability to shift into the big-big or small-small front-rear gear combinations.
So aside from the cassette itself, worst case you might need to replace your chain (Check Ebay, DX10SC's are all over the place for around $30), and your RD. Expect to pay around $40-$70 for a lower-end Campy RD depending on group, from a place like Ribble Cycles.
One other detail: since your existing cassette has a 12T small cog, I think you can reuse your current lockring. Campy seems to have started including lockrings with new cassettes lately so this should not be an issue anyway. They used to make you buy them separately for some hefty fee (like $25), and they have different sizes for cassettes with 11T small cogs vs 12T and larger, so you had to worry about whether you had the right size. I believe 12T and 13T cassettes use the same size though, so you're covered whether the new cassette includes one or not.
Last edited by Metaluna; 10-06-09 at 04:57 AM.