Originally Posted by
Michael Angelo
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.
Okay I'm still lost; except for the Chorus in the B position, none of the derailleurs in the Campagnolo charts are slant parallelograms; they are all inline parallelograms. Campy didn't switch to slant parallelograms until 1988 for Chorus and 1991 for Record and 1992 for Athena (+/- a year); the catalog I took the chart from was 1988..It is also my impression that by the time 7 speed freewheels were being made, most the freewheel makers were using the 5mm CtoC standard, it was the 8 speed freewheels/ shifters were Campy parted ways by staying with 5.0 spacing while Shimano/Suntour, and eventually SRAM and Sachs, went to 4.8mm.