I’ve just bent the rear rotor on my Merida e160 and replaced it with a Swissstop rotor. It’s great but the problem was what to do about the magnet. For now I’ve just epoxyed a magnet to the rotor but planning a more robust solution with a thin sheet of titanium.
There is a very good argument for putting the larger disc on the back. Bigger disc doesn’t affect power just heat dissipation, which brake do you use most on a long descent?
Just catching up on this thread; I’m interested in retrofitting a Rohloff and belt drive setup to my full sus ebike. I was concerned about mud but it sounds like this is ok. My other concern is the extra weight of the rear hub (there are some pretty rocky trails round my way). How have you found it?