5. SPECIAL CASES

In the case of trailers of categories O_(1) and O_(2), with a maximum vehicle design speed of 100 km/h or less and fitted with tyres of class C1 in single formation, the maximum load rating of every tyre shall be at least equal to 0,45 times the technically permissible maximum axle mass for the most heavily loaded axle, as declared by the manufacturer of the trailer. For tyres in dual (twin) formation this factor shall be at least equal to 0,24. In such cases a maximum operating speed warning label, specifying the maximum vehicle design speed, shall be permanently and durably affixed near the front coupling device of the trailer. In the case of vehicles of categories M_(1) and N_(1), which are designed to be capable of towing a trailer, the additional load imposed at the trailer coupling device may cause the rear tyre maximum load ratings to be exceeded in case of class C1 tyres, but not by more than 15 %. In such a case, the vehicle owner’s handbook shall contain clear information and advice on the maximum permissible vehicle speed when towing a trailer, in any case not exceeding 100 km/h, and on the rear tyre pressure, at least 20 kPa (0,2 bar) above the tyre pressure(s) as recommended for normal use (i.e. without a trailer attached). In the case of some special vehicles, as listed below, fitted with tyres of class C2 or C3, the ‘table load-capacity variation with speed’ as described in paragraph 3.2.2 of this Annex shall not be applied. In such a case, the tyre maximum load rating to check against the technically permissible maximum axle mass (see paragraphs 3.1.2 to 3.1.4) shall be determined by multiplying the load corresponding to the load capacity index by an appropriate coefficient which is related to the type of vehicle and its use, rather than to the maximum vehicle design speed, and the requirements of paragraphs 4.1.1 and 4.1.2 of this Annex shall not apply. The appropriate coefficients shall be the following: 1,15 in the case of a Class I or Class A vehicle (M_(2) or M_(3)), as referred to in paragraphs 2.1.1.1 (Class I) and 2.1.2.1 (Class A) of UNECE Regulation No 107 OJ L 255, 29.9.2010, p. 1. . 1,10 in the case of vehicles of category N which are specifically designed for use over short distances in urban and suburban applications, such as street and road sweepers or refuse collection vehicles, provided that the maximum vehicle design speed does not exceed 60 km/h. In exceptional cases, where vehicles are designed for conditions of use which are incompatible with the characteristics of tyres of class C1, C2 or C3 and it is therefore necessary to fit tyres with different characteristics, the requirements of paragraph 1.1 of this Annex shall not apply, provided that all of the following conditions are met: the tyres shall be approved according to either UNECE Regulation No 75 Has not been published yet. Will be published by May 2011. or UNECE Regulation No 106 OJ L 257, 30.9.2010, p. 231. ; and the type-approval authority and technical service are satisfied that the tyres fitted are suitable for the operating conditions of the vehicle. The nature of the exemption and motivation of acceptance shall be stated in the test report as well as under the remarks on the type-approval certificate.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-06 · Text as adopted (Official Journal); later amendments are not incorporated in this text.