Motor Type: QS138 90H 4KW V3 Mid Drive Motor 
Motor Design: PMSM 
Matching Tires: 12-19 inch 
Magnet Height: 90 hours 
Rated Power: 4000W 
Peak Power: 13500W 
Rated Voltage: 48v-96v 
Speed: 4800 rpm @ 72V, 7000 rpm (flux weakened) 
Maximum Torque: 150 Newton meters 
Cooling Method. : Air-cooled 
Maximum efficiency: 93% 
Thermal probe: KTY83-122 
Operating temperature: 70-120 °C, peak 150 °C 
Hall sensor: 1 set 
Phase cable: 20 mm² cross section of phase wires (excluding insulation) 
Maximum DC current: 200A 
Reduction ratio: 1:2.35 
Waterproof rating: IP67 
Color: Black 
N.W./G.W. : 14.5kg/15.5kg 
Packing size: 34cm * 33cm