Bir eco electric motorbike has 30 km/h maximum speed, drum brake, 70 km range dis. per charge, 500W DC motor power : brushless motor, 48 V/ 20Ah gel battery, 28 kg battery weight, 2.5-18” tyre, up to 8 hours charging time, 50 kg weight, 1680 x 580 x 1020 mm dimensions.