Battery: 36V 10AH lithium battery Range per change: 45-55 KM Motor：36V 250W/350W brushless Frame: 16″/20″ aluminum alloy frame Derailleur: Shimano Tyre: 16″/20″*1.75 Aluminium Alloy, Bicycle, Motorcycle, Vehicles, Website, Bike, Bicycle Kick, Bicycles