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Baron Karl von Drais made the first two wheel vehicle. it had no pedals so people pushed with their feet.
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Kirkpatrick Macmillan added pedals and making the bicycle move without pushing the ground.
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Pierre and Ernest Michaux built a bicycle with pedals on the front wheel. It was bumpy to ride.
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Bicycle with a huge front wheel became popular. They were fast but not safe.
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John Kemp Starley made the safety bicycle with equal wheels and a chain. It looks like bikes today.
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John Boyd Dunlop invented air-filled tires, making bicycles smoother and more comfortable.
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Factories made many bicycles so they became cheap and common for travel.
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Bicycles became popular for fun and exercise. New lighter bikes were made.
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Mountain bikes were made for rough trails and outdoor adventure.
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Electric bicycles and new strong materials made cycling easier and faster.