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Frequently Asked Questions

What is the DEX?

In a representative, Europe-wide survey, Europe's leading Internet tyre dealer Delticom asked motorists from 15 countries to weight the three criteria of the EU tyre label.

The resulting prioritisation of the EU tyre label criteria forms the basis of the DEX (Delticom Efficiency Class Index). The DEX is therefore a combination of the value of each of the tyre’s label criteria and the weighting of these criteria. The DEX can be useful for facilitating purchase decisions. In Delticom’s various online shops, the "DEX" is displayed on a rating system of one to five stars. The more stars the DEX of a tyre has, the closer the tyre’s labelled efficiency classes match the preferences determined by the surveyed motorists. Note: The DEX is only valued for summer and all-season tyres!