Specifications: FOB :SH Motor¡êo250W Max speed: 25 km/h Distance for full charge: >35KMS Frame: 6061#Aluminum Alloy Assistant System: 1:1 Battery: 36V 10AH Lithium ion battery Tire Size: 20 inches Weight: 21 KG Brake System: Disc Brake Charging time:4-6H Dimension: 900*370*650mm Derailleur: Shimano Outer 7 speed Dimension: 900*370*650mm