Probably not much help, as it is now a bit historic, but I used to use Big Apple on my folding commute, on my single speed folder. I suspect that the e-folder will have different usage characteristics, and the tyres may have moved on. Possibly, my preference for running high pressure on the rear tyre may carry over to the e-bike? The one thing that WAS important was to avoid a fight with the bead, as I had enough problems with the rear anyhow, which ruled out M+ for me.