# Regulation (EC) No 1222/2009 of the European Parliament and of the Council of 25 November 2009 on the labelling of tyres with respect to fuel efficiency and other essential parameters (Text with EEA relevance), Division 4.2.7.2: Test cycle

Extent: E+W+S+N.I.

A number of test runs are made in order to measure the wet grip index of the candidate tyre (T) according to the following procedure, whereby each test run shall be made at the same spot on the test track and in the same direction. Up to three candidate tyres may be measured within the same test cycle, provided that the tests are completed within one day.
(1) First, the reference tyre is tested.
(2) After at least six valid measurements are performed in accordance with section 4.2.7.1, the reference tyre is replaced by the candidate tyre.
(3) After six valid measurements of the candidate tyre are performed, two more candidate tyres may be measured.
(4) The test cycle is closed by six more valid measurements of the same reference tyre as at the beginning of the test cycle.

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Source: https://www.legislation.gov.uk/eur/2009/1222/annex/V/division/4/division/4.2/division/4.2.7/division/4.2.7.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-1222/annex-V/division-4/division-4.2/division-4.2.7/division-4.2.7.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.