... , 350W,500W brushless motor 20", 26", 28" wheel 36V/12Ah, 36V/14Ah, 48V/12Ah, 48V/14Ah Electric Bike Conversion KitKit for converting normal ... , 250W, 350W, 500W (optional) CNC sidewall Aluminum Rims available: 20”, 26", 28" (optional) Lead-acid battery: 36V/12Ah, 36V/14Ah, 48V ...