JDMotorisdesignedforfacilitatingelectricbicycle/scooter/motorcycle/wheelchair/wheelbarrowmanufacturer'sassembly.hubmotorshaveslickstructure,compactsize,highoutputtorque,highefficiencyandlownoise. 1Longworkinglife(>10,000hours) 2Lownoise,hightorque 3Excellentperformancecharacteristics 4Highefficiency(>80%) 5Highreliability. 6LowPrice Model: JD-BLM-004 OuterDiameter(mm) 400 Power(W) 500/1000 Voltage(V) 24/36/48 Efficiency(%) 80> Weight(Kg) 11kg