MeasuringAt 08:29 AM 11/23/00 -0500, Jerry & Liz Moos wrote:
> TA Cyclotourist, Zeus Competition, Some Nervar models, and even
>Lambert chainrings used this pattern. However, these cranks usually had
>different bolt circles where the inner chainring bolted to the outer one, so
>you could switch a pair of rings from one crank to another, but couldn't use
>an inner of one brand with a different outer. The inner bolt circle of the
>Stronglight 49 is 122mm, same as the mod 93 and 104. I'd be interested to
>know what the inner circle of the Nervar rings is. Perhaps 128mm like the
>Nervar Star?
Measuring a Nervar of this type with the small 5 hole pattern I get 128 (well 129 but we know I measured wrong) Also this pattern goes back at least to the turn of the centurey and fits, among many others, BSA cottered cranks.
Joe