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Campy Shifter/Derailleur Compatibility

Old 10-17-17, 06:19 PM
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VoodooRada
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Campy Shifter/Derailleur Compatibility

I'm currently running a Veloce 9-speed group with a 12-28 cassette and short cage derailleur. My knees want me to get lower gearing, and I know I'll need a medium cage derailleur. My question is: will a current production Potenza medium cage derailleur shift properly with my 9-speed Veloce shifters and an 11-32 9 speed cassette? Campy's literature says it's compatible with 2015 and later shifters, but Sheldon Brown says that only cassettes and shifters have to match. As a bonus, the Potenza rear mech gives me an opening to piece together an 11-speed upgrade at some point. Thanks for any advice.
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Old 10-17-17, 06:30 PM
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I'm not 100% familiar with Campy's newest offerings, but can point you down the right road.

A key element of any index system is the RD's response to cable pull. The lever has to match and pull the right amount of cable per click, so the RD moves the intended amount.

Think of it like the captain ordering full sped ahead, and the crew understanding, and not going at 3/4 speed.

Campy used the same cable ratios throughout the line since 2001 for both 9s and 10s. So any 9s or 10s lever would work properly with any derailleur of the era to give the expected results.

BUT, here's the catch.

Campy might have changed that critical cable ratio in 2015 or another year, and that would mean you only have cross compatibility within the same series, ie. 2001-2014, and 2015 and beyond.

Note that I'm not saying that anything changed since 2001, just that it might have, and that's what you need to research.
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Old 10-18-17, 11:28 AM
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No, Campy re-engineered there shifters and derailleurs in 2015 to work with a different cable pull. So your older Veloce 9 speed shifters theoretically will not work with 2015 or newer rear derailleurs (or front for that matter). I believe there are lots of older Campy rear derailleur on E-bay. Problem i determining what year they are and whether it will work. One thing I like about Shimano is thier use of part numbers; something that SRAM and Campy seem to minimize. This leaves people like you trying to identify the model year and figure out comparability issues. Good luck.
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Old 10-18-17, 10:22 PM
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Originally Posted by VoodooRada View Post
I'm currently running a Veloce 9-speed group with a 12-28 cassette and short cage derailleur. My knees want me to get lower gearing, and I know I'll need a medium cage derailleur. My question is: will a current production Potenza medium cage derailleur shift properly with my 9-speed Veloce shifters and an 11-32 9 speed cassette? Campy's literature says it's compatible with 2015 and later shifters, but Sheldon Brown says that only cassettes and shifters have to match. As a bonus, the Potenza rear mech gives me an opening to piece together an 11-speed upgrade at some point. Thanks for any advice.
St. Sheldon was a smart guy, but a Shimano man who didn't live to see the changes they made moving to 11 cogs.

As other posters noted, Campagnolo revised 11 speed in 2015 (with 2009-2014 sharing one configuration). I don't know if 10 has followed yet (9 lagged 10 by a year in 2000-2001).

Campagnolo also changed the rear derailleur geometry with the move to 10 cogs, because the 10 speed cassette is wider than the 9 (it has an offset big cog that sits closer to the spokes), 9 1mm wider than the 8, and they needed more travel which couldn't be had without making the shifter bodies larger to accommodate bigger cable drums.

Does your derailleur have a traditional B-tension screw, or does it have a screw and sector gear on the lower pivot?

With the lower pivot adjustment, it shares the 2000-2014 10 speed (2001+ 9-speed) geometry so you can use a "10 speed" medium or long cage rear derailleur although you might want the narrower 10 speed chain. Derailleur movement is 1.5X cable.

With the B-tension screw, it uses the 8 speed geometry; and you can use an old Racing-T or Veloce triple, derailleur which is a medium. Derailleur movement is 1.4X cable.

Match the configuration you have.

Campagnolo tended to report derailleur capacity based on what they sold at the time so it's not clear from the specs what "should" work, and variation in hanger placement can increase capacity.

Long is really long, officially good for at least 38T of wrap from when they made no cassette wider than 13-29 (now there's the 12-30 10 speed)

Also note most Campagnolo left levers will shift triples. If your right lever shifts 5-8 cogs smaller with one button press, your left lever has 12 clicks of which 4 are used for doubles and 6-7 triples. You can go much lower with one than a double, or keep tighter spacing with the same range. Used triple parts are very inexpensive when not marked "Record" which makes them collectible.

Last edited by Drew Eckhardt; 10-19-17 at 02:29 AM.
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