Originally Posted by
onespeedbiker
I have never heard that?? Everything I have read shows the index rings were designed around the different Campy derailleurs and the number of speeds. Campy shows a spread sheet like below but they are primarily concerned with derailleur type, speeds and what chains work best with which freewheels; nothing about index rings being freewheel specific..
That Chart confused everyone, all Those Freewheels had different Spacing. Even the smallest amount will make a huge difference when working with Syncro Systems.
Please keep in mind the 7 speed Syncro Derailleurs were all Slant Parallelogram. 8 speed syncro is a whole diffferent system. The system was flawed so much so that
Regina made a Special Freewheel to work with Syncro systems. Americas, CX's and other 7 speed Reginas will not index with Syncros, I know, I've tried.
Sutherlands 20th Page 6-4
7 speed
Blue index ring ( has no mark):Campagnolo approved Regina 90-S 7 speed (marked with <C> in diamond inside the threaded Portion that threads with hub)
Green :stamped A7 : Shimano SIS
I will post pictures tonight of my Super Mondia 7 speed SyncroII system with a Regina Syncro 90-S freewheel (blue insert) It shifts perfectly.