Originally Posted by dutret
You get me both srm cranks and a powertap and I will happily do the test. I would be suprised if the drag of the rear derailer pulleys or the extra friction in the chain would be significant. Those are the only differences between the two drivetrains.
I was hoping that you would supply the tech stuff
Yeah, the pulleys and the winding route of the chain, plus the sometimes very crooked chainline are the only difference. But that's a lot, actually.