I have 3 bikes with 9, 10, 11 speed mechanical Ultegra. It seems to me that the adjustment of the 9 & 10 speed Ultegra front derailleurs is pretty easy and when I'm through there is very little chain rub. 11 speed is a whole nother can of worms. In the first place, the outside of the cage is indented quite a bit which makes the cage very narrow for the big chain ring. The adjustment was a little involved and when one is through, even with the trim feature, it is, it seems, impossible to operate without chain rub in at least three places. Of course, DI2 self-centers, so I'm only speaking of mechanical. What are others' experiences in this matter? I'm almost sorry that I upgraded one of my bikes to 11 speed.
