Originally Posted by
danh123
So the RPM assist has the amount of assist linked to how fast you are spinning the pedals and the torque sensor senses your force on the pedal and amplifies the power right?
The Bafang RPM assist is frequently more of a binary assist. If you're pedaling, it adds a fixed amount of power depending on assist level. There's a lower power for initial start-up, then a temporary boost, then a long-term power that's applied. The crank on a Bafang mid-drive can freewheel, so pedal RPM does not have to equal crank RPM.
Especially at high assist levels, it's possible to spin the pedals at 60 RPM to keep the assist active, but to engage the crank you would need to be at 90+ RPM.