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Keywords: Carnegie Science Center 1886 Rover Safety Bicycle.JPG en Th 1886 Rover Safety Bicycle on display at the Carnegie Science Center in Pittsburgh PA It introduced the basic features of contemporary bicycles such as direct steering two equal-size wheels the chain drive to the rear wheel and the diamond shaped frame that provided rigidity 2013-09-29 13 54 46 own Photojunkie No restrictions on publication Uploaded with UploadWizard Carnegie Science Center Vintage bicycles |