Gears 21 Speed Frame Material Black titanium steel Wheel Size 14 Voltage 48v Power Supply Lead-acid/lithium electricity Braking System Brake Line Battery Capacity 20AH Other attributes Motor position Rear Hub Motor Battery Position underpedal Smart Type bluetooth Range per Power > 60 km Max Speed 30-50Km/h Torque 50-60 Nm Charging Time >3 hours Product name Luxury