Campagnolo: Can I run an 11 speed chain on my 10 speed chainrings? I have a bike with 10 speed front derailleur and chainrings.
The cassette, rear derailleur and shifter will all be 11 speed.
Can I run an 11 speed chain on this? Everything is Campagnolo.
Thanks
Very likely yes this will work fine.  The main risks are

that it is &quot;out of spec&quot; by the manufacturer so a warranty claim might be rejected
11 speed chain is narrower than 10 speed so the FD's cage will be a little wider - meaning the shifter has to move a little more to nudge the chain over
the tolerance changes can increase the risk of a dropped chain on the inside, between, or outside of the chainrings.

Though I've successfully used 9 speed chain on what started as a 5 speed triple chainset, and its still working fine (though its friction shifting which may disguise some shifting issues.)