I just got a Defy Advanced 4 and I am considering bringing over my Ultegra SL group set to this frame. It currently has an FSA BB and I believe this is a BB86 set up.
The Shimano site says the BB86 is for the Hollowtech II cranks and I do not believe the Ultegra SL 6600 is only Hollowtech. The Defy Advanced 2 appears to have a Dura Ace BB with the 5700 105 cranks.
I have heard conflicting information that the FSA BB might work, but that it might not. Before I have both bikes in pieces does anyone know the correct press in BB that would work with my Ultegra SL cranks? It is working great on the current bike, but it would be nice on the new frame set too.
Thanks in advance for the help.