Amazon.com : 250W 500W Electric Bicycle Conversion Kit, Front Wheel Electric Bike Motor Conversion Kit, Upgrade Smart Motor Controller, Twist Throttle, Dual Mode Controller E-Bike Cycling Hub,48V250W-24 : Patio, Lawn & Garden
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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