SPECIFICATIONS Brand Name: RIDSTAR Voltage: 48V Wattage: > 500w Power Supply: lithium battery Range per Power: > 60 km Style: Luxury Type Motor: Brushless Rated Passenger Capacity: One Seat Wheel Size: 20“ Max Speed: >50km/h Frame Material: Carbon Steel   Ridstar Official shops are more secure. True 1000W high speed motor + 15AH batteryTrue 1000W high speed motor + 20AH batteryTrue 2000W high speed motor + 40AH （52V）battery2000W version with two motors.Three versions in one:The configuration differences have been shown through the pictures and I will advise you if you have questions.   Q20 EBIKE The Q20 e-bike is a comfortable e-bike developed by our company and suitable for people of 158cm-195cm in height. The wide seat allows you to ride with children, equipped with a front hydraulic shock absorber and a central cushioning device, equipped with the original bike waterproof bag, red oil disc brakes to highlight the fashion elements, equipped with Shimano 7-speed transmission, so that there is no obstacle ahead of you. Basic parameters Basic parametersExpanded size: length 1710*width 850*height 1080mmWheelbase: 1180mmActual weight: 34kgMode: pure electric, electric assist, pedalFront fork: hydraulic front forkBraking system:Front and rear red oil disc brakesTransmission system: rear driveTire size: 20*4.0Display: LCDMaximum speed ≤50km/hEndurance 80kmSlope <35°Load weight≤150kgMotor parameters: 48v1000WMotor type: DC brushless high-speed motorRated voltage 48VMain technical parameters of chargingOutput power 3ACharging time 6HLithium battery parametersBattery type: 18650 lithium batteryCapacity ：20AHThe main parameters of the controllerUndervoltage protection: 39VOvercurrent protection: 28A