Old 12-20-10, 07:58 AM
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Location: Washington County, Vermont, USA
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Bikes: 1966 Dawes Double Blue, 1976 Raleigh Gran Sport, 1975 Raleigh Sprite 27, 1980 Univega Viva Sport, 1971 Gitane Tour de France, 1984 Lotus Classique, 1976 Motobecane Grand Record

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PX-10 Simplex hanger problem, now with pictures

This issue has been mentioned on a couple of different threads, but I'm starting another one since I now have photos. I'm fixing a PX-10 for a friend that has a partially butchered Simplex hanger. The old Simplex derailleur was busted (merde!) so the guy at the LBS took an electric drill and a 15/32 bit and bored out the original hole so he could insert one of those threaded "dropout savers." Then he bolted on a Shimano Tourney derailleur--the ugliest derailleur ever made, it looks like to me. Not sure why that worked on the Simplex hanger, but it did. I can't stand to leave it there, though--it's too hideous.

Here's my main question: Can I install a new dropout saver (the old one was so tight I wrecked it trying to get it out) and then install a Simplex RD in the 10 mm (threaded) mounting hole? It seems to me that that SHOULD work, but I've never actually seen an intact Simplex hanger before, and I have my doubts about this one. As you can see in the photos, the crudely drilled hole is not at all centered in the dropout, but is offset by a couple of millimeters toward the back. Was the original hole supposed to be centered, and the off-centeredness is a result of the butchery? If so, is that amount of non-centeredness likely to matter?

My plan had originally been to use a Huret Duopar RD with a mounting claw--I have one set up for the Huret-style mount--which I think can be installed without further violence to the integral Simplex hanger. The problem is the frame looks awful with both an integral hanger and a claw. I'm very reluctant cut off the integral hanger, though. (Although as I admitted to miamijim, I almost wish the LBS had cut it off, because it would make everything easier. And if it had happened before the bike came to me, it would be on someone else's conscience, not mine.)

But they didn't, so the hanger stays, which means going back to Simplex. Since this is a "geezerizing" project, I need a long-cage version. That would be what, an SX410GT or SX610GT? Does anyone have one that they'd be willing to part with, for cash or some sort of trade? Either of those derailleurs will handle a 34-tooth large cog, yes?
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