So, the answer is "no"? I did all those searches, including campyonly. It still wasn't clear (even "Item 15"). The 2011 Veloce is still 10 speed, so I thought it might be possible.
Originally Posted by jimc101
Isn't a Centaur just an upgraded Veloce, so why would a 2011 Centaur be compatible?
The only relevant post at campyonly was this. I don't have much confidence in the answer.
11 Speed Rear Deraileur on a 10 speed
Postby jglantzx2 » Tue Dec 28, 2010 2:36 pm
11 speed deraileur works fine on 10 speed set up.
You need to change the 11 sp pulleys to 10 sp pulleys.
Also, I swaped out the titanium parts from a record 10 sp rear deraileur to a record 11 sp.
Makes it lighter and more or less equivalent to a super record rd