Long term reviews of Chorus 12 speed versus 11?

[cyan]

Originally Posted by jkbrwn

To answer your question:

Yes, a 12s chain will work on your carbon-ti rings with a 12s rear derailleur. I am running Praxis 11sp rings and it works. HOWEVER. Does it work well? Hmm, not really. Campagnolo changed the spacing ever so slightly with 12sp as far as I understand and it pushes the chainline out ever so slightly from 11sp. Therefore, 12sp rings just work better. It'll start off fine. It'll shift nicely in the workstand and even on the road but then over time, it'll get a bit noisy and shifting won't be as good. My shifting is now pretty lackluster and so is drivetrain noise. I just need to buy Campagnolo cranks/rings. And so should you if you buy any 12 speed Campagnolo groupset.

Here's a post from Craig Gaulzetti that describes the exact behaviour I have found from running 11sp rings on an otherwise totally 12sp setup:

So do the issues described by Craig apply only to a mixed group of 11-spd and 12-spd stuff, or even to a complete 12-spd group? I've seen many people complain about the noises by their 12-spd Campy, and wonder if what Craig's said is (part of) the cause.