Have you measure the Q on the Pistard Air cranks? Presumably they're sensitive to chainring thickness, like the Campag cranks with hidden 5th bolt. Did they go together with the Arc ring painlessly, or was there shimming/grinding involved?
I'm slightly toying with the idea of getting Vision NS as they are 10mm narrower than my Zipps
Have you measure the Q on the Pistard Air cranks? Presumably they're sensitive to chainring thickness, like the Campag cranks with hidden 5th bolt. Did they go together with the Arc ring painlessly, or was there shimming/grinding involved?
I'm slightly toying with the idea of getting Vision NS as they are 10mm narrower than my Zipps