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Bafang bbshd 48v 36v 250w-750w for electric mountain bike motor e-bike bbshd ebike mid drive conversion kitMotor specificationPure electricvehicle speedPure chargePower endurance36V250W33-35km/h36-38km80-120km36V350W38-40km/h33-36km60-100km48V350W38-40km/h38-42km90-130km36V500W48-50km/h30-33km60-100km48V500W48-50km/h35-38km80-120km48V750W52-55km/h32-35km60-100km48V/52V1000W60-62km/h28-32km50-80km* The larger the rim wheel diameter, the faster the speed;The smaller the rim wheeldiameter is, the stronger the climbing ability is; The faster the speed, the more powerconsumption, the data is for reference only, please refer to the actual prevail, thank you!