QS273 4000W 40H Electric Bike Spoke Hub Motor V3 Type 152mm drop-outs

QS273 4000W 40H Electric Bike Spoke Hub Motor V3 Type 152mm drop-outs This motor is specially customs for the high-power electric bicycle or motorcycle,which with 150mm rear fork width and sprocket! General Sepc. Motor type: BLDC Hub Motor with Hall sensors Motor design:Spoke Hub Motor with 36 spoke holes Motor rim size: Can be fitted 17-24inch bike or moped rim Magnet:40mm, 16 pole pairs Rated power: 4000W Peak power: Potential to 8000W Rated voltage: 72V as default Max. speed: 80kph as default, can be customs,too Max. torque: 200n.m Max. efficiency: 90% Peak current: 110A at 72V Continious current: 55A at 72V Peak phase current:250A Drop-outs: 152mm With english thread for single sprocket Double hall sensor group Cross section of the phase wire: 10mm2 Water proof: IP54 Weight: 18kgs The speed of winding Kv can be customized!