1. High quality, low price. 2. Light weigt < 1.6kgs. 3. Brushless, ... power: 150W-250W3. Rated rotating speed: 280RPM Max.4. Rated efficiency: greater than and equal to 79%5. Front fork size ... magnetic hysteresis is damping energy consumption, Strong climbing capability11. High efficiency, wide scope high efficiency, low electric power consumption, long distance for driving 12 ...