Originally Posted by
spdntrxi
This technology allows you to shift to higher or lower gears with your right hand shifter and both front and rear derailleurs will operate to optimise chainline. It will also automatically shift the rear mech when you change from the large ring to the inner ring to maintain smoothness.
googled
I don't believe it. There is still this belief that a 44X11 is as good as a 56X14. It just ain't so.