1.Compact,low noise and energy saving 2.Quick/soft starting, ... .CE, CCC certificated 4. Waterproof disign Features of this Product:1). Applicable to E-Bike, E-scooter, E-Tricycle and so ... (W)250Spoke Specification12g/13gWheel Size20--28Hall SensorOptionalRated Speed (km/h)25+/-1Torque sense insideYesRated Efficiency (%)>=80SurfaceSilver paintedReduction Ratio1:4.4Brake TypeDisk ...