Mark-
Here's what I'd do: I'd make it work by modifying the threads in the dropout, or alternatively modifying the threads on the der. The slickest solution would be to make some sort of fitting that would allow you to preserve both the der and the frame, but that could be a lot of work. Maybe what you'll have to do is find or fabricate a "plug" to fill the existing der hole in the hanger. Come to think of it, you could sacrifice a cheap der pivot bolt that's hanging around. Then, once that piece has been threaded-in, and filed flush with the rest of the dropout face, you can drill progressively larger holes until you get to the right size hole for tapping to the correct threads for your GT der. Your only $ investment will be for that tap. You'll have to figure out how to keep that threaded plug from unscrewing, but a combo of loctite and some punch divets should do.
What do you think?
John Barron Minneapolis MN
Mark Agree wrote:
Date: Sat, 29 Dec 2007 20:38:12 EST From: FujiFish1@aol.com To: classicrendezvous@bikelist.org Subject: [CR]Gran Turismo rear der. mounted to Campy 1010a dropout? Message-ID: <c9f.201e94ea.34a85084@aol.com> Content-Type: text/plain; charset="US-ASCII" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 9
I had finally figured out what to do with a mid level (at best), approx. 1970 Torpado road bike that I got from Matteo, some years ago. It is orange,
with long Campy dropouts. My new scheme is to use a nice honkin' Gran Turismo rear, Gran Sport front, bar end shifters, weighty Campy steel three arm crank, and other appropriate items for the theme. Great. The problem is that the rear unit I have is pre-mounted to a black steel hanger, with the beautiful red-C'd bolt ... that has threading significantly smaller than the mounting hole in the dropout. I've looked at every single Campy bolt I have in all the misc derailleurs in
my collection, and not one will serve as a substitute, due to the extra wide
sleeve on the derailleur that the bolt must travel through and clear. Every
bolt is simply too short.
Now, I really had my heart set on seeing that red C on the completed bike.
Is there a proper fitting red-C bolt available that threads into the
dropout?
Can I possibly just go ahead and mount the unit USING the black steel Campy
hanger, even though the dropout has one too? I doubt this highly, as there
would be no room for the hardware on the back side of the unit ... it would
awkwardly push off the face of the dropout; true or false? I'm willing to
let
go of using the red-C bolt if no proper fitting one can be had, but what
else then? If I have to omit the GT rear from the project completely, then
I'm
gonna scrap it, and go back to the drawing board
Any ideas? Any experience? Anyone got a red-C bolt that threads into a
Campy dropout, for sale ... please? Thanks so much!!!
Ciao,
Mark Agree
Southfield MI USA