Usual speed limitation: 36V <40km/h (250W motor) 48V <55km/h (500W motor) Usual riding range with load limitation: 36V 12Ah : 20km 36V  18Ah : 40km 48V  12AH  : 15km 48V  21Ah  : 40km Speed & range governed by Voltage, Ampere Hour & Wattage