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Why can't you make a bicycle completely out of rubber? A manufacturer describes the different materials needed to make the different parts of a bike. He discusses the importance of a rigid steel frame which is strong but light and the rubber tyres which are important for comfort and grip while still being tough. Plastic is then discussed as a lightweight material useful for any 'extras' found on the bike, as it can be moulded to any shape.
This clip is from:
First broadcast:
8 October 2007

Classroom Ideas

Children who have been given a design project which includes the criteria of using more than one material could watch this clip to help refine their thinking about the importance of selecting the correct material for the purpose. Children could then consider the range of materials they could use and their suitability for use in their design project.

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