Richard Cielec asked
> Ahoy !
>
> I have a Campag., alloy, three arm crank, compleat - dumpster find, actually, attached to an Ishiwata tubing Trek.
> Are rings difficult to find, either Campag or after market?
> What model is this? The Gran Sports I've seen are 5 arm.
> Thanks.
> Richard Cielec
> Chicago, Illinois
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Richard,
BCD for these are 116 mm. Original chainwheels are occasionally to be found on ebay, both Campagnolo, TA and Stronglight.
SJS Cycles - sjscycles.com - sells modern TA chainwheels for tem in a number of sizes.
hope this helps
Olof Stroh
Uppsala Sweden