Technical FAQ: Campy Chorus 9-speed derailleur with 10-speed drivetrain.

  • By Lennard Zinn
  • Published Sep. 9, 2009
  • Updated Aug. 29, 2010 at 10:36 PM EDT

Dear Lennard,

Can I use a Chorus 9-speed rear derailleur with 10-speed cogs, chain & Ergo shifters?

Dear Mark,
Yes, as long as the wider jockey wheel cage does not contact your spokes.

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Lennard Zinn

Lennard Zinn

Our longtime technical writer joined VeloNews in 1987. He is also a framebuilder, a former U.S. National Team rider, and author of many bicycle books, including Zinn and the Art of Mountain Bike Maintenance and Zinn and the Art of Road Bike Maintenance, as well as Zinn and the Art of Triathlon Bikes and Zinn's Cycling Primer: Maintenance Tips and Skill Building for Cyclists. He holds a Bachelor’s degree in physics from Colorado College. Readers can send brief technical questions to Ask LZ.

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