Originally Posted by
Bianchigirll
how many non Zeus bikes used Zeus dropouts? why wouldn't itbe aZeus that someone just updates the drive train to make it index?
+1. A Zeus is the most likely candidate. It was obviously updated for indexed shifting in the late 1980s/early 1990s. Based on the fittings it would appear to be late 1970s or early 1980s. Given the era, if it was a Zeus there's a high probability that it would still use French thread standards and metric gauge tubing. If you can confirm that, that would increase the confidence level in its being a Zeus.