AKAKTM
Member
Can you expand on this?
Bosch seems to use a relatively sophisticated algorithm or map that compares distance traveled, speed and crank speed over time In addition to simply measuring pulses from the sensor/rotor magnet combo. So if you simply install a Planet3 with only one magnet resulting in a magnet speed reduction of 3:1, the motor will detect it quickly and present a 503 code. If you run two magnets to have less reduction, then the motor may not detect it immediately, but may still detect it over time, sometimes tens or hundreds of miles. The key will be to determine at what ratio the map will accept the input and not present an error code.
I am not willing to risk it with my motor so I’ll just be constrained to 19mph. Therefore, that’s a disadvantage of the Bosch relative to the Levo. On the levo, if you want to reduce to 650b wheels, there is a provision where the shop, not the rider, can adjust wheel size to 2000mm circumference. If you then put 29 wheels back on, the bike will run more than 22mph. My Levo was setup like this and I really appreciated it.