48V 1000W about 45-55km/h. 48V 1500W about 50-60km/h. Rim: Double-wall Aluminium Alloy Sun Ringle Rim. Hub Motor: 48V 1000W 1500W Brushless Non-gear Hub Motor. Controller: 48V 1000W 1500W Controller. Brake: Black Aluminum Alloy Brake Levers. Throttle: Half-Bar Twist Throttle. Display: 48V LCD Display. PAS: 8 Magnets Pedal Assistant. Bottom bracket: Rear :135mm-142mm.