Originally Posted by
DannoXYZ
It only matters if you're riding at LT and time-trialing on all your rides and giving it your all. Otherwise, if you can just push 2-4% harder when using the Rohloff hub.
The Rohloff has less transmission efficiency than 2-4%. There was a scientific paper published on Human Power a while ago, and the Rohloff was tested, among other gear hubs and derailleurs. The best transfer efficiency the Rohloff achieved was about 5%, but usually a bit less.
The gear hubs with best transfer efficiency were the 3-speed Shimano gear hubs, around 4-5%. Where the EFF did I save that .pdf....