For casual riding on flat terrain I use level 2 and 7th gear. On mountain trails, with up and down hills, I am usually in level 3 and 5th gear. But that is me. My bike is a mid drive motor and at my age I am no longer aggressive but still love off road trails.
We have 100 miles on our Rad Mini 2 ST and have found that we were going to fast, i.e. 12-17MPH in 7 Gear, why. When this dawned on me that this was happening, we reduce the Pedal Assist from 2-3 to 1-2 and used the all & gears and then reduced the Road speed to 8-10 MPH. We alos think it is a safer speed where we bike.more