The Bicycle

1. Materials

1.1. Reynolds 531 - made bicycles lighter

1.2. Dunlops pneumatic tyres

1.3. Lightweight aluminium alloys

1.4. Carbon Fiber added to bicycles

2. Environmental Impacts

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

2.2. Human power is a renewable energy source

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11. History

11.1. 1839 - Pedals Invented

11.2. 1870 - "Old Ordinary" (1.5m Front Wheel)

11.3. 1874 - Lady's Bicycle (Side-saddle)

11.4. 1880's - Bike chain Added to reduce front wheel size

11.5. 1888 - Air filled tires

12. Social Effects

12.1. Pedals greatly increased the usability of the bicycle

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

12.3. Suez oil crysis - forced people to use bicycles