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The maximum current is determined by the ebikeâs controller, and is usually somewhere between 15-30 amps. An ebike with a 48V battery and a 20 amp peak controller would theoretically be capable of a nominal 960 watts of instantaneous power. This is where things get complicated though, because ebike manufacturers donât always rate their parts this way.
This should be done through the breakout box to check the entire circuit. A good wheel speed sensor and circuit will typically have a resistance of 800 to 1400 ohms (specs vary, so refer to a manual for the exact numbers). If the sensor circuit has too much resistance, reads open or is shorted (little or no resistance), measure the resistance across the sensor itself.