it isn't as simple as what turn it is, there is the material of the magnets, the diamter of the rotor and the airgap, these all go along at define the RPM of the motor, but might not actualy show the 'power' of the motor, it is never as simple as that.
The sensorless motors can be geared pretty high, whereas the sensored motors need a much smaller pinion to achieve the same 'performance'. If that makes sense.
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