Originally Posted by
noglider
Perhaps someone can think of a way to measure this. [MENTION=19437]Dan Burkhart[/MENTION]?
Thanks for the vote of confidence, but I think this one is a bit beyond what I'm equipped to do.
I can't find it right now, (where is tcs when you need him), but somewhere there is a page showing efficiency data on various gearhubs and derailleur drive trains. I don't remember if the Nuvinci was included.