Hi Ladies,
I recently realized that the chain on my "new-to-me" bike is a shimano and the cassettes and derailleurs and everything are Campy. I've put about 100-200 miles on the bike with this chain.
My LBS said that it wasn't good and that now neither Campy specific (6.2mm) nor Shimano specific (~6.00mm?) chains may work (narrower shimano chain wears down the teeth then the wider campy chain won't fit correctly if I put it back on)...

I was looking around online and Campy is now making 5.9mm chains. If campy offers chains in a range from 5.9-6.2 why would the 6.0ish Shimano chain be such a problem?

I'm up for buying whatever I need to keep my bike running well, but right now I don't know what that might be.

Please Help!

Thanks
Sara