Detailed Product Description electric bicycleSpecification20' electrical bicycle6061 aluminium alloy frame36v lithium cell,25-42km/h,endurance:60kmmedium -count assistant electric motorShimano,rear shift lever setYake, disc brakesZheng Xin, 20*1.75tiresWheel Top, aluminium cotter,chain wheelHong Guang, foldable pedalKMC,chainaluminium foldable handle,seat pillar,rim,stemAssess, aluminium hubsY.S ...