Originally Posted by
bikingbrit
So how does it work?
Think of it this way. If you decreased the wattage you produced into the bike by 4% do you go 4% slower? If you increased your wattage by 4%, do you go 4% faster?
So what is the difference likely to be? I notice that you left out the pertinent point. That being that the difference, whatever it is, is likely to less than normal day-to-day variations.
The difference
to the user is negligible. Once you are riding internally geared hubs like that I don't think you'll be trying to set any TT or climbing records at your local club rides.