Amazon.com : Yose Power Waterproof 26Inch 500W Ebike Conversion Kit with 48V 13Ah Battery for Cassette 26" Electric Bike Rear Wheel, Electric Bicycle Hub Motor Kit, LED Display, Installation Tool : Sports
Amazon.com: 48V 250W 500W Electric Bike Conversion Kit, 20 24 26 27.5 28 29 Inch 700C Electric Front Wheel, Bicycle Hub, E-Bike Motor Conversion Kit, 500W-700c : Everything Else