Finally had the time and opportunity to make some videos. Sorry, they are a bit shaky.
I guess I smoked that guy with his yellow FG Monster Truck pretty good
Gearing was 20/46, topspeed 66mph measured with GPS "Android Tacho" app.
Offroad:
http://youtu.be/oJ4qirFzCLM
Onroad:
http://youtu.be/Gpb5UubZMMI