# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 5.7: Road load family


Only vehicles that are identical with respect to the following characteristics may be part of the same road load family:
(a)Transmission type (e.g. manual, automatic, CVT) and transmission model (e.g. torque rating, number of gears, number of clutches, etc.). At the request of the manufacturer and with approval of the approval authority, a transmission with lower power losses may be included in the family;
(b)n/v ratios (engine rotational speed divided by vehicle speed). This requirement shall be considered fulfilled if, for all transmission ratios concerned, the difference with respect to the transmission ratios of the most commonly installed transmission type is within 25 per cent;
(c)Number of powered axles;
(d)Number of wheels per axle.
If at least one electric machine is coupled in the gearbox position neutral and the vehicle is not equipped with a vehicle coastdown mode (paragraph 4.2.1.8.5. of Sub-Annex 4) such that the electric machine has no influence on the road load, the criteria in paragraph 5.6.2. (a) and paragraph 5.6.3. (a) shall apply.
If there is a difference, apart from vehicle mass, rolling resistance and aerodynamics, that has a non-negligible influence on road load, that vehicle shall not be considered to be part of the family unless approved by the approval authority.

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/XXI/division/1/division/5/division/5.7 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-XXI/division-1/division-5/division-5.7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.