Plotting to build my '79 Trek 530 with Campy GS. Traded nlerner for a nice Nuovo GS RD (thanks Neal!).
What's the largest tooth cog this will handle? I'm hoping to get the lowest gearing possible using it. I've got an Atom 77 with a 24T low , and I'm guessing that's probably the largest it can handle?
I'm assuming the GS over the years had a similar capacity. If not, I can get a photo of the one I have. It's marked with an "M" ... not sure if that's a date code.