Wait a second...
The Grin E-bike Sim has the leaf motor? :shock:
Holy shit, why didn´t I notice that.
Playing a bit with the sim, it looks like thats exactly what I want. Runs about 50 kph and has a nice range under 30kph.
The leafbike 1500W 5T with a 48-52V and about 10Ah battery pack...