Air permeability is a widely known term in tyre manufacturing. One of the main reasons for major road accidents which often lead to loss of life's is the catastrophic tyre failure caused by vehicles running with improper tyre pressure. The phenomena where the tyre loses pressure naturally and contracts over time is called air permeation, which is identified to be the main cause of tire deflation but rarely can be realised by naked eyes. And the level with which this happens is tested by Air permeability tester.
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