Noted:Battery not included. 1 front or rear Motor wheel(28/29inch 700C). 1 pair Power cut-off Brake lever. 1 set Twist Throttle. 1 Pedal Assistant Sensor. Conversion Kit not include tire. If you need a tire. 48V 1000W about 45-55km/h. (different wheel size, road&weather condition and rider’s weight will have different speed). Brushless Non-gear Hub Motor for 48V. Rim: Double-wall Aluminium Alloy Rim. Wheel Bottom bracket: Rear 135mm-142mm or Front 100mm. 30-40NM for 500W 1000W. 470 for 48V 1000W. 540 for 48V 1500W.