E-BIKE Conversion Kit 24V/36V 250W Electric Bicycle Motor Set For 22''-29'' Bike | eBay
Amazon.com : Electric Bike Conversion Kit 20"/24"/26"/27.5"/28"/29"/700C Electric Bike Conversion Kit, Rear Wheel Electric Bicycle Motor Conversion Kit, E-Bike Cycling Hub,Ebike Conversion Kit with LCD Display (C : Sports & Outdoors