Let me add that on hills I use whatever pedal assist level is necessary and I always try to avoid using the throttle, if you are bogging down at level 5 then the throttle will too but with severely reduced battery life and damaging heat. If its moderate and I'm feeling strong I'm usually on level 2. When the incline increases I often end up at level 4 and sometimes 5.

Sitka glad to hear you're still riding at 80!!! As one of the early Rad Riders since 2017 I must tell you that unfortunately the Rad Rover is not a powerful off road hill climber, the hub drive motor cannot compete with mid-drives on the hills. That said I have taken my Rad to some high places which required lots of pedal assist from me with eventually using the "walk assist" function. I'll offer up my best advice to reach the summit and not fry the Bafang rear hub motor (easily done if overheated).

1.Always use the lowest gear! Take your time and enjoy the experience.
2.Any pedal assist from YOU is beneficial and almost mandatory, using throttle alone will overheat on steep hills.
3.When you do use throttle, watch your display, if you are exceeding 500 watts under full load and bogging down, the internal hub is heating up and bye bye motor.
4.When it gets real steep, get off and use the walk function.
5.What goes up must come down. Steep downhills on the way back can literally be your downfall, lower seat and make sure you periodically adjust your breaks (very easy to do with the mechanical, its just a turn of the allen wrench.)

As one of the early Radrover owners since 2017, I can tell you that with nearly 800 miles on the original Kendatire Juggernaut delivered with the bike, I have failed to destroy them in any kind of mountain / high desert terrain I've encountered. Yes they are an economy tire but they've handled goat head thorns in the summer, snowy trails in the winter and miles of asphalt in between. Let me add that the first thing I did was add the Mongoose tubes and the tuffy tire liners and that my friend is the crucial element in never having a single flat tire.  And yes, these Seattle worthy tires are surprisingly durable in the Rocky Mountains as well.