... frame36v lithium cell,25-42km/h,endurance:60kmmedium -count assistant electric motorShimano,rear shift lever setYake, disc brakesZheng Xin, 20*1 ... ,seat pillar,rim,stemAssess, aluminium hubsY.S Paint ,flame platingColor:black,silver,blueN.W:21kgCarton:77x35x73cmConveyance:126pcs/20'GP;290pcs/40 ...