Lvbu BT40D electric bike conversion kit 27.5inch for bike
quick installation/bottle battery design/simple design/ beautiful design/one cable/18650 power lithium ion battery/kettle battery/including rim tire/Multiple wheel sizes/electric bike/IP65 waterproof rating/36v 250w/36v 350w/High quality /long assist range/sports/Removable bottle battery/thumb throttle/120km