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  • ENERGY EFFICIENCY The label indicates the rolling resistance class to which the rubber belongs. The ratings range from A (lowest RR) to G (highest RR).
  • Liability in wet conditions The relevant class is assigned by comparing the test results with those of a reference rubber. The ratings range from A (best) to G (worst).
  • Noise levels There are three classes of external rolling noise, represented by one, two or three sound waves, with one wave being the best rating and three waves the worst. The decibel (Db) value measured during the tests is also given.

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