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| Even visually flawless, new or barely used tyres with sufficient tread depth, which are older than six years, may show significant reduction of wet properties and winter suitability due only to ageing. |
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| Tyre tests show that a continuous development process, the use of new rubber compounds and modern raw materials, in conjunction with the optimisation of tread design and tread geometry, make it possible to continually improve tyres. |
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| Only tyres with state-of-the-art technology can meet the requirements of modern and highly developed vehicles from Volkswagen and the constantly growing demand from the customer for economical tyres offering maximum possible safety, driving dynamics and comfort. |
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| Tyres age as a result of physical and chemical processes, which can impair the function of the tyres. Tyres which are stored for longer periods of time harden and become brittle faster than tyres which are constantly in use on a vehicle. |
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| Older tyres may develop hairline cracks as a result of ageing. |
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| When tyres are in regular use, the constant flexing activates softeners in the rubber, preventing hardening and the development of cracks. |
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| It is therefore important to take into account not only the tread depth, but also the age of spare tyres, stored tyres and tyres which are not permanently in use. |
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| The tyre age can be determined from the DOT designation, which includes, among other things, the production date of the tyre. |
| Example of a DOT number to 31.12.1999 |
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