Originally Posted by
operator
This was already instantly true when chains when to 7/8 speed and started peening rivets.
Not new information or technology.
It was news to me when I read this on BF.
I got back into bike mechanics a couple years ago when I built up a new/vintage bike from the frame up. I set it up 2 x 10 and used my trusty 1980's chain tool to size the chain AND push the pin in to get the 10 speed chain back together. I road this bike for quite awhile before I discovered that this was a no-no.
No problems fortunately.