... racing bike,1).Motor: 180W-350W motor 2).Battery:24V,8AH/10AH, or 36V,8AH/10AH Li-ion battery 3).speed:25km/h Electric racing ... bike: JSL-038XFSpecification:1).Motor:180W/200W/250W High ... speed brushless DC hub intelligent motor 2).Battery ... Derailleur: Shimano, 6-speed 16).With 1:1 intelligent pedal assistant system (PAS)17 ...