I've had both versions of the Bosch active motor, 1st gen & now the 3rd generation.
The first gen motor has an internal gear reduction and a noticeable cutoff, saying that it still rode above cutoff and my top speed down hill was 49mph
( gutted it wasn't 50
)
As others have said and I agree, with the 3rd gen active motor there's no noticeable cutoff point, I still find myself at 17-18 mph going up & down the assist levels just to see if I'm getting any help or doing it all myself. My cube acid doesn't have the tall gears so current top speed is only 43mph
so far