Gone, but not forgotten
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Bikes: See: http://sheldonbrown.org/bicycles
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Originally Posted by theopowers
So...that's my question. How do I know that a given seven-speed freewheel will work with 7-speed Campy index shifters?
Sounds like you have the infamous "Synchro" system. There used to be quite a few different, interchangeable index detent disks intended to work with various different freewheels. No way to know which of the 7-speed versions you have.
This system was basically flawed to begin with, because it used excessively short cable travel per shift. This magnified the effects of cable stretch and cable friction, and they basically never worked properly.
Actually, Campagnolo deserves credit for good intentions...their plan was to make a system that would provide indexing using their older derailers. Unfortunately, it just couldn't work.
Eventually they gave up on Synchro and went to their current system, which uses lots of cable travel per shift, even more than Shimano (though not as much as some Sram stuff.)
Basically, you're wasting your time trying to get this to work.
Sheldon "Nice Try" Brown