I see... good theory. Also. Anyone know then when they stopped the bulging side plates then? I have some 6 and 7 speed bikes that I'd like to put a new shimano chain on and was wanting the best shifting chain I could get. I'm asking because I have a good deal on an 11 speed dura ace chain but it looks like the side plates are flat, and I didn't know if that was a dura ace chain or not.
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70's Nuovo Record Jeunet Franche Compte, '88 105 Trek 1200, '85 Victory Bianchi Vittoria, '89 Exage Bianchi Strada LX, & '11 Shimano Masi Partenza