Which specific machine introduced by John Kemp Starley codified the safety bicycle in 1885?
Answer
Rover Safety Bicycle
The machine credited with truly establishing and sparking the cycling craze by codifying the safety bicycle design was the Rover Safety Bicycle. Introduced in 1885 by John Kemp Starley, this model featured the key characteristics that defined the modern era of cycling: direct steering, two similarly sized wheels (typically around 26 inches), and, most importantly, rear-wheel drive managed by a chain. The success of the Rover demonstrated that a low, stable machine could be both fast and efficient, leading the market to abandon the older, inherently dangerous high-wheel designs rapidly.

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