Proposal to correct editorial errors in the adopted proposal for Supplement 18 to Regulation No. 54 (document WP.29/2012/49). This proposed corrigendum was adopted by the GRRF based upon a document prepared by the European Tyre and Rim Technical Organisation (ETRTO) (document GRRF/2013/26).
Reference Number: | WP.29/2014/51 |
Meeting Session(s): | 163rd WP.29 session (24-27 Jun 2014) |
Document date: | 28 Mar 14 |
Document status: | Adopted text published |
Regarding: | |
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Proposal adopted by the GRRF to harmonize the definitions used in UN R54 with the amendments (ECE/TRANS/WP29/2010/63) to UN R117 approved by the World Forum at its June 2010 session.
Reference Number: | WP.29/2012/49 |
Meeting Session(s): | 157th WP.29 session (26-29 Jun 2012) |
Document date: | 12 Apr 12 |
Document status: | Adopted text published |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2012/49) was adopted by the World Forum. Thirty-eight Contracting Parties out of the 43 applying UN R54 were present for the vote by AC.1. Thirty-eight voted in favor with zero against and zero abstaining. | |
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Proposal to incorporate additional tire sizes within the regulation for commercial vehicle tires sold in countries requiring type approval according to UN Regulation No. 54. This proposal was adopted by the GRRF at its 75th session based upon a proposal by the ETRTO (document GRRF/2013/19).
Reference Number: | WP.29/2014/47 |
Meeting Session(s): | 163rd WP.29 session (24-27 Jun 2014) |
Document date: | 28 Mar 14 |
Document status: | Adopted text published |
Regarding: | |
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Proposal to permit the “LT” marking as a prefix or suffix to align the requirements with the current practice for C2 tyres with metric size designation. The proposed text for a prefix is in line with the latest draft of the gtr on tyres. The proposed text for a suffix is necessary for tyres designed to Japan Automobile Tyre Manufacturers Association (JATMA) standards. The proposal would add new tyres for light commercial vehicles (high flotation tyres) in Annex 5 of UN Regulation No. 54.
Reference Number: | WP.29/2015/66 |
Meeting Session(s): | 166th WP.29 session (23-26 Jun 2015) |
Document date: | 10 Apr 15 |
Document status: | Adopted text published |
Regarding: | |
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Proposal to:
Reference Number: | WP.29/2016/52 |
Meeting Session(s): | 169th WP.29 session (21-24 Jun 2016) |
Document date: | 05 Apr 16 |
Document status: | Adopted text published |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2016/52) was adopted by the World Forum. Thirty-seven Contracting Parties out of the 46 applying UN R54 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and zero abstaining. | |
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Proposal to introduce formulae for tyre sizes in Annex 5, Table B, add sizes in Annex 5, Part II, Tables C and E for old sizes that do not follow the guidelines/formulae applicable for high flotation tyres, amends footnotes in Annex 5, Part II, Table B in order to clarify categories of use, clarify tyre width tolerances, correct paragraph numbering and references, align the text editorially with UN R30 and to make other editorial improvements.
Reference Number: | WP.29/2018/55 |
Meeting Session(s): | 175th WP.29 session (18-22 Jun 2018) |
Document date: | 09 Apr 18 |
Document status: | Adopted text published |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2018/55) was adopted by the World Forum. Thirty-five Contracting Parties out of the 48 applying UN R54 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining. | |
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Proposal to
Reference Number: | WP.29/2017/68 |
Meeting Session(s): | 172nd WP.29 session (20-23 Jun 2017) |
Document date: | 11 Apr 17 |
Document status: | Adopted text published |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2017/68) was adopted by the World Forum. Thirty-seven Contracting Parties out of the 48 applying UN R54 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and zero abstaining. | |
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Reference Number: | WP.29/2021/5 |
Meeting Session(s): | 183rd WP.29 session (9-11 Mar 2021) |
Document date: | 17 Dec 20 |
Document status: | Adopted text published |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2021/5) was adopted by the World Forum. Thirty-six Contracting Parties out of the 50 applying UN R54 were present for the vote by AC.1. Thirty-six voted in favor with zero against and zero abstaining. | |
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Proposal from GRBP to clarify the use of an additional load/speed combination for a tyre type, to consolidate the calculation of reference dimensions with that provided in GTR 16, and to avoid placing requirements in the Definitions section and otherwise improving the text via use of the term “service description” (as introduced in Supplement 24).
Reference Number: | WP.29/2022/85 |
Meeting Session(s): | 187th WP.29 session (20-24 Jun 2022) |
Document date: | 05 Apr 22 |
Document status: | Adopted by WP.29 |
Regarding: | |
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Proposal to introduce amendments addressing the following:
1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G “special purpose vehicles” (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers).
2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks.
3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly.
4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to “additional service description”) to provide this information.
5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h).
6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8). An example of the actual differences (in percentage and in absolute value) is provided.
7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking “LT”, or “C” have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol).
8. The definition of “snow tyre” is amended to clarify that “snow tyres” are not only suitable for the use in snow conditions but also on mud and by replacing the term “maintain vehicle motion” (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of “controlling vehicle motion” (i.e. also being able to change the vehicle speed and direction of movement as intended).
9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations.
Reference Number: | WP.29/2023/73 |
Meeting Session(s): | 190th WP.29 session (19-22 Jun 2023) |
Document date: | 08 Jun 23 |
Document status: | Adopted by WP.29 |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2023/73) was adopted by the World Forum. Thirty-three Contracting Parties out of the 52 applying UN R54 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining. | |
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Proposal to specify a tolerance for the maximum overall width of tyres identified by the “tyre to rim fitment configuration” symbol A.
Reference Number: | WP.29/2024/2/Rev.1 |
Meeting Session(s): | 193rd WP.29 session (24-28 Jun 2024) |
Document date: | 09 Apr 24 |
Document status: | Adopted by WP.29 |
Regarding: | |
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Proposal to
Reference Number: | WP.29/2025/71 |
Meeting Session(s): | 196th WP.29 session (23-27 Jun) |
Document date: | 10 Apr 25 |
Document status: | Adopted by WP.29 |
Regarding: | |
Adoption Vote | |
This proposal (WP.29/2025/71), as amended by para. 72, was adopted by the World Forum. Thirty-five Contracting Parties out of the 55 applying UN R54 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining. | |
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