Dura Ace 9000 photos!
Check out this site, it's in French but from what I can understand, these prototypes were found on Alex Dowsett's Pinarello Dogma 2. If you look closely, it's a 11 speed cassette. Also note the new wheelset with the 11sp compatible hub.
http://www.monde-du-velo.com/actualite-cyclisme/presse-premiers-tours-de-roues-pour-le-dura-ace-9000-11-vitesses-116200.html
http://www.monde-du-velo.com/actualite-cyclisme/presse-premiers-tours-de-roues-pour-le-dura-ace-9000-11-vitesses-116200.html
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