How did the first safety leap (frame geometry) differ from the second (pneumatic tires) in preventing accidents?
Answer
The first leap prevented the highest-risk accident (the header), while the second mitigated common loss-of-control accidents.
The shift to the safety bicycle geometry prevented the highest-risk accident type (falling from height), whereas the subsequent addition of pneumatic tires mitigated the risk of common loss-of-control accidents caused by poor surface interaction.

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