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The safety bicycle, first appearing in 1876, revolutionized personal transportation. It featured two wheels of similar size, typically around 28 inches in diameter, and a chain-driven rear wheel connected to pedals. This design offered significant advantages over earlier models, such as improved stability, easier mounting, and more effective braking, thanks to a lower center of gravity and direct front steering.12

Key innovations like the bush roller chain in 1880 and the pneumatic tire, introduced in 1888, further enhanced comfort and reduced rolling resistance, making cycling more accessible and popular. The standardized design led to mass production and widespread adoption, significantly impacting social movements and becoming a democratic form of transportation worldwide.13

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