Bicycle in 1900: Bicycle milestone 3

Human-powered two wheels — the most efficient personal vehicle ever mass-produced. Bicycle is one of 48 vehicle types in this atlas. The pages treat it as a full system — history, anatomy, operating principles, culture, icons, future pressure and market shape — not a product brochure.

Scores compare bicycle with the other types on speed, efficiency, accessibility, safety, cultural impact and tech disruption. They are relative editorial judgements, not laboratory ratings. Seven chapters dig in: origins, systems and cutaways, how it works, cultural life, legendary icons, what comes next, and how money and regions structure the fleet.

Bicycle is not a single machine — it is a family of designs, duties and cultures inside the road atlas. This deep intro maps how the type varies, what systems make it work, and why places adopt it differently. Utility city bikes, cargo frames, gravel and performance road bikes — muscle plus optional assist — all count as bicycle here.