> In yet another of my priceless (free) > bottom-feeder tips, pitch hardly matters > because the back side of the Simplexes > was undercut, so there was hardly much > meat to thread. I always used a backing > nut on these...
Harvey and my other friends, I would make no assumptions about a particular set of forged Simplex dropouts without first examining them very carefully. I say this because those dropouts seem to have been manufactured in 2 different styles. Plus, I would not be surprised if there were versions with which I'm totally unfamiliar. I have an old Peugeot PR-10 frame which has the "expected" unthreaded derailleur mounting tab. For forged dropouts, these pieces are relatively thin. They also are not drilled for adjuster screws. I have a somewhat more modern PGN-10 which also has forged, Simplex dropouts. These are thicker - almost (but not quite) as thick as a Campagnolo 1010; and like the Campagnolo pieces, they have adjuster screws. But the truly ironic part - at least in my opinion - is that these dropouts came tapped for a Campagnolo specification derailleur mounting bolt. The irony is due to the fact that the bicycle came with a Simplex derailleur that was mounted with a backing nut. So my message for dealing with this stuff is: inspect and measure, because little is absolutely certain. Still, thanks so much for the tip about using using a plumber's tap. Just for the experience, I might try it out on the PR-10 frame. That's set up as a "pignon fisse" (I know that sounds snobbish but it is a French bicycle after all). If I make a mistake it really won't matter. Signing off fast because, as they would say in J. P. Belmondo films, "merde, le flique", Fred Rednor - Arlington, Virginia, USA
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