Originally Posted by
conspiratemus1
Syncro was a stab at reducing the frustration that novice cyclists who were accustomed to Sturmey-Archer 3-speeds had with trying to get their derailler bikes to shift properly but the whole technology of chain, derailler, and cogs hadn't developed far enough to make it work reliably.
Actually Synchro was a stab (and a less then successful stab) at matching Shimano's SIS index shifting which was already a proven performer. It took Campy three trys to get their indexing to work properly.