I've noted that on Simplex Retrofrictions, the brazeon version, made for Campy bosses, has a different fixing bolt thread than the clampons. If one presumes the clampon bolt thread is the same as used for the old Simplex brazeon bosses, then bolts from Simplex clampon shifters should work. I've also found SS socket head bolts at the hardware store that will work with the Simplex shifter clamps (I use them to convert brazeon Retrofrictions to clampon). These may work on the old Simplex brazeon bosses as well.
Regards,
Jerry Moos Houston, TX
dave martinez <dmart84815@yahoo.com> wrote: Hello Mitchell,
Looks like a Simplex B.O.
Regards, Dave Martinez Fremont Ca
Mitchell Gass wrote: I'm curious to know what kind of shifter bosses are on this frame, a Jack Taylor International from the early 60's (SN 4709):
http://www.gassworks.com/
The threads are not the same as current bosses. Are they for Huret shifters? Would Simplex retrofriction shifters work?
Thanks for any help!
Mitchell Gass
Berkeley, CA, USA