electric brushless bicycle motor: 1.wheel size:26" 2.volt and power:36v-48v/180w-500w 3.max ... : 250w-500w, 3) Max Efficiency:≥82% 4) Wheel Size: 20"-26''5) RPM: 300rpm.6) CE -approved7) one normal package size ... *61*29,include the motor,controller,brake handle,throttle,PAS,26"rim and spokes) 26" brushless bicycle motor