Vehicles
Bicycle
Human-powered vehicle · 1817
The most energy-efficient form of transportation ever invented. The diamond frame, pneumatic tyre, and chain drive remain largely unchanged more than a century after their introduction.
Key specifications
Efficiency
>90%
Weight
7–15 kg
Gears
1–30
Users
>1 B
Sheet 004 · Plate 1 of 1 · 1:1 infographic
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