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Amazon.com : Vivi Electric Bike, 27.5" Electric Bike for Adults 500W Ebike Electric Mountain Bike Adult Electric Bicycles with 48V 10.4AH Removable Lithium Battery, Shimano 21 Speed Gears, Up to 50 Miles :
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Amazon.com : Vivi Electric Bike, 27.5" Electric Bike for Adults 500W Ebike Electric Mountain Bike Adult Electric Bicycles with 48V 10.4AH Removable Lithium Battery, Shimano 21 Speed Gears, Up to 50 Miles :
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