... Specification:1).Motor: 180W/200W/250W/350W/500W High speed brushless DC hub intelligent motor 2).Battery: 36V,13AH ... Li-ion battery 3).Max speed:25km/h / Pedaling-electric model 30-50km/h 4 ... front/rear 15).Battery case:Alloy16).Derailleur: SHIMANO, 7-speed 17).With 1:1 pedal assistant system (PAS)18). ... 'ft: 195pcs / 40HQ:218pcsOptional parts:tool kits,Front basket, speed meter