Brandon Ives wrote:
>
> I was just fishing through my boxes and was checking out a pair of older
> campy cranks. I know date stamping the cranks started in '73, but when did
> they switch away from the 151mm BCD to a 144mm BCD? These cranks are 144mm
> and all that they say on the back of the crank is "170 strada." What's the
> story?
It's all explained in the Campagnolo Timeline:
Chuck Schmidt
South Pasadena, California