# 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 2.4: Data formats to be used for the computations and results

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

The measured RRC values corrected from drum diameter and temperature shall be rounded to 2 decimal places.
Then the computations shall be made with all digits: there shall be no further rounding except on the final alignment equations.
All standard deviation values shall be displayed to 3 decimal places.
All RRC values will be displayed to 2 decimal places.
All alignment coefficients (A1 l , B1 l , A2 c and B2 c ) shall be rounded and displayed to 4 decimal places.

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Source: https://www.legislation.gov.uk/eur/2009/1222/annex/IVa/division/2/division/2.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-1222/annex-IVa/division-2/division-2.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.