The old GH6 (or AG/FG geared dynohubs) have completely undetectable drag. All this talk of it being like going up a hill seems alien to me. How can Shimano copy something and then make it worse?
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The hill equivalence is just to show how little drag there is. It is never going to be a purfect system, even the son has drag.
The hill equivalence is just to show how little drag there is. It is never going to be a purfect system, even the son has drag.