I had to think about that but yes very true. The 11 year old Crystalyte 5304 I have powers the hefty beast uphill at about the same speed as gravity pulls it downhill. With a 9-speed gearbox, I pedal no matter what gradient. So no not actual mountain biking - it's another form altogether - uphill monster biking is far more accurate.No one in their right mind would choose a hub motor for actual mountainbiking