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Amazon.com : Redfire Hybrid Bike for Men and Women, 21-Speed Drivetrain, 700C Wheels,19/21 Inch Aluminum Frame, City Commuter Bicycle for Adult, Black : Sports & Outdoors
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Schwinn Network 6c Hybrid Bike, 21 speeds, medium 17.5 inch mens style frame, 700c wheels, grey - Walmart.com
Bike Sizing Guide - Bike Sizing Guide - Cycle Shop | Camden Cycle | Second Hand Bicycle | Touring Bicycle in UK
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