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Technical FAQ: Vintage Campy derailleur mounting bolts

  • By Lennard Zinn
  • Published Jun. 23, 2009
  • Updated Nov. 16, 2009 at 1:27 PM EST

Dear Lennard,
Is the threading on the Campy Nuovo Record rear derailleur mounting bolt a different size than the Campy Victory?

I’m rebuilding a mid-80s Trek 760 with some Super Record & Nuovo Record components and the rear derailleur appears to not want to thread onto the dropout (the Victory derailleur that came with the bike threads in just fine). I don’t want to see metal shavings coming out of the dropout after applying pressure to the bolt, so I thought you’d be the person to consult.
-Bill

Dear Bill,
Geez, I sure don’t think so. I think I’ve maybe put on one Victory rear derailleur in my life, if that, but I certainly don’t recall that they could not be mounted on a standard derailleur hanger.

I’ve put on oodles of Super Record and Nuovo Record derailleurs in my day, and they always fit a normal rear derailleur hanger. And I can’t imagine any mid-1980s Trek not fitting a Nuovo Record rear derailleur. So I think the bolt on your Nuovo Record rear derailleur must be damaged.
-Lennard

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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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