The Bicycle

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The Bicycle by Mind Map: The Bicycle

1. History

1.1. 1839 - Pedals Invented

1.2. 1870 - "Old Ordinary" (1.5m Front Wheel)

1.3. 1874 - Lady's Bicycle (Side-saddle)

1.4. 1880's - Bike chain Added to reduce front wheel size

1.5. 1888 - Air filled tires

2. Materials

2.1. Reynolds 531 - made bicycles lighter

2.2. Dunlops pneumatic tyres

2.3. Lightweight aluminium alloys

2.4. Carbon Fiber added to bicycles

3. Social Effects

3.1. Pedals greatly increased the usability of the bicycle

3.2. Internal hub gearing - improved bike as a form of transport

3.3. Suez oil crysis - forced people to use bicycles

4. Environmental Impacts

4.1. Cycling is seen to be a solution to green hous gases.

4.2. Human power is a renewable energy source

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