... frog lithium ion battery disc brake 7.5kg completed weight Kit NameDescriptionUnit PriceFront drivemotorDiameter 108mm, 2 kg,fork 100mm, 36V 350W ... ,for both 36V/48V,350W US$20.00Lithium Ionbattery36V 10AH in frog case,10-20A discharging,Max 8A charging,dia 91 ... 140 holesoption disc tray US$9.00 ebike 36v 250w kit electric bike conversion kit