... , V brake option, with hall sensor 3) 145mm fork, for 26" wheel 4) 3 kgs only Specifications:1) Rated voltage: ... Strong climbing capability11) High efficiency, wide scope high efficiency, low electric power consumption, long distance for driving 12) Superior water-proofAttention ... controller should be less than 10A.3) The motor should be free from water while it is working. electric bicycles DC Motor