John Thompson wrote:
>
> >> Then I looked in my 60s vintage
>>> Zeus catalog and found -- sure enough -- that Zeus offered PISTA rings
>>> for both 1/8" and 3/32" chains way back then!
> >> How the PISTA ring ended up on a double crank is still a mystery, though.
>
> > Commonly used for pursuits.
>
>Ok. But what then is the difference between a road ring and a pista ring
> when both are intended to use 3/32" chain? Why not just use regular
>road rings for both road and pursuit purposes? That would help inventory
>issues if nothing else.
Are you sure they're the same BCD? Up until about 1967, Campagnolo used the 151 mm BCD for track stuff, 144 mm for road...Zeus stuff was generally the "poor man's Campagnolo" using similar designs and specs...
Sheldon "Not A Zeus Fan" Brown
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