# 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 4.2.8.4: Calculation of the average peak braking force coefficient ( μ peak,ave )

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

The average value of the peak braking force coefficients ( μ peak,ave ) is calculated according to table 4 whereby Ta ( a = 1, 2 or 3) is the average of the peak braking force coefficients measured for one candidate tyre within one test cycle.
Table 4
Test tyre
μ peak,ave
Reference tyre
μ peak,ave (R) = Ra as per Table 3
Candidate tyre
μ peak,ave (T) = Ta

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Source: https://www.legislation.gov.uk/eur/2009/1222/annex/V/division/4/division/4.2/division/4.2.8/division/4.2.8.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-1222/annex-V/division-4/division-4.2/division-4.2.8/division-4.2.8.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.