GAR | WP.29-196

WP.29/1186 World Forum: Report of the 196th (June 2025) session

UNECE: .pdf | .docx GAR: .pdf | .docx

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4.8. Consideration of draft amendments to existing UN Regulations submitted by GRBP

71. The Chair of GRBP presented draft amendments under agenda item 4.8.1. The World Forum recommended their submission to AC.1 for voting.

72. WP.29 considered draft amendments under agenda items 4.8.2 to 4.8.13 and recommended their submission to AC.1 for voting, subject to the following editorial corrections: ECE/TRANS/WP.29/2025/68, ECE/TRANS/WP.29/2025/71, ECE/TRANS/WP.29/2025/72, paragraph 6.1.1.1., amend to read: “6.1.1.1. The section width S of a tyre fitted on the measuring rim shall be calculated by the following formula: , and rounded to the nearest millimetre, Where: S1 is the nominal section width in millimetres, as shown on the sidewall of the tyre in the tyre designation as prescribed; …” ECE/TRANS/WP.29/2025/72, Annex 5, Table 7, first column, rows MU90-15, MV90-15, MU85-16, MV85-15, delete “M/C”. ECE/TRANS/WP.29/2025/73, paragraph 2.22.1., the first sentence, amend to read: “When the nominal rim diameter (“d” symbol) is expressed by code, the values of the “d” symbol are as follows:…”. ECE/TRANS/WP.29/2025/76, paragraph 6.8., first sentence, delete “all of”. ECE/TRANS/WP.29/2025/77, paragraph 5.2.3.2.2., replace “… the Snow Grip Symbol for Studded Tyres1 as described in UN Regulation No.” with “… the Snow Grip Symbol for Studded Tyres1 as described in UN Regulation No. 164)”. Paragraph 5.2.5.2., first line, delete “a”. ECE/TRANS/WP.29/2025/78, paragraph 12.3, replace “… based on snow performance test described in Annex 7 to this Regulation…” with “… based on snow performance test described in Annex 7 to UN Regulation No. 117…”.

UN R108: Proposal for Supplement 1 to the 01 series of amendments
Reference Number: WP.29/2025/73
Proposal to: Correct the description of a tyre to exclude aspects outside the scope of UN R108 Align the snow tyre definition to UN R109 and 172 Clarify the definition of nominal rim diameter Clarify the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres) Amend para. 4.1.5.3.2. to remove the retreaded reference to traction tyre classification because it is not applicable to tyre of class C1 Clarify the calculation of the tyre section width Replace “XXX” with the UN Regulation No. 172 in the references to the approval of retreaded tyres with regard to their snow performance and/or classification as traction tyre.</li< Correct an omission Clarify the text of Annex 3: The positioning and order of the markings shall be as follows:….
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 108 \| Retreaded Tires for Motor Vehicles
Adoption Vote
This proposal (WP.29/2025/73), as amended by para. 72, was adopted by the World Forum. Thirty-three Contracting Parties out of the 54 applying UN R108 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
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UN R117: Proposal for Supplement 3 to the 04 series of amendments
Reference Number: WP.29/2025/76
Proposal to standardize provisions for the water depth measurement, reduce the track friction range requirements under the test procedures, clarfy that adhesion performance on wet surfaces (wet adhesion) is required not only for C1 tyres, but also C2 and C3 tyres, update the standards references to ASTM F2493-244, F3611-24, F3676-24, F3675-24 and ISO 4000-1:2024, align the definitions of tread groove and principal grooves with proposals for UN R30 and R54, simplify the wording of the requirements for professional off-road tyres, and correct the transitional provision in paragraph 12.23. to specify approvals “first issued after 31 August 2028”.
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 117 \| Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance
Adoption Vote
This proposal (WP.29/2025/76), as amended by para. 72, was adopted by the World Forum. Thirty-four Contracting Parties out of the 57 applying UN R117 were present for the vote by AC.1. Thirty-four voted in favor with zero against and zero abstaining.
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UN R30: Proposal for Supplement 27 to the 02 series of amendments
Reference Number: WP.29/2025/68
Proposal to: Update reference to ISO 4000-1:2024 (published in March 2024) Clarify the structure indication within the tyre size designation for run flat or self-supporting tyres suitable for speeds in excess of 240 km/h (inscription “ZRF”) Clarify the nominal rim diameter. Amend the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators. Introduce definition of tread depth (used in the requirements for special use and professional off-road tyres) Clarify the calculation of tyre section width Claify the D_max requirement for snow tyres.
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 09 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 30 \| Pneumatic Tires
Adoption Vote
This proposal (WP.29/2025/68), as amended by para. 72, was adopted by the World Forum. Thirty-five Contracting Parties out of the 55 applying UN R30 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining.
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UN R172: Proposal for Supplement 1
Reference Number: WP.29/2025/78
Proposal to: Add new reference tyres C3 SRTTs 19.5 and 22.5 siped and related transitional provisions Simplify the wording of the requirements for professional off-road tyres Make editorial corrections where needed throughout the text.
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 172 \| Retreaded tyres: Snow performance and/or traction classification
Adoption Vote
This proposal (WP.29/2025/78), as amended by para. 72, was adopted by the World Forum. Thirty-seven Contracting Parties out of the 61 applying UN R172 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and zero abstaining.
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UN R142: Proposal for Supplement 2 to the 01 series of amendments
Reference Number: WP.29/2025/77
Proposal to: Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 1 Align title of para. 5 with its contents (paras. 5.1. and 5.2.) Align the title of para. 6 with corresponding paras. in UN R30, 54, 75, 106 and 117 Clarify that all temporary use spare units can by composed by using tyres of any category of use Align the snow tyre definition with UN R30, 54 and 117 Clarify that tyres for use in severe snow conditions are also applicable to the category of use ‘special use tyres’ Clarify which service conditions can apply the coefficient given in paragraphs 5.2.4.3.1. and 5.2.4.3.2. Add Class C3 tyres to the speed category symbol and load capacity index definitions Introduce definitions of free rolling tyre and front axle and revise markings accordingly (ref. documents GRBP-80-03 and GRBP-80-26) Clarify reporting the name of the symbols used for tyre for use in severe snow conditions in line with UN R117 and 164.
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Superseded
Relevant to: UN Regulation No. 142 \| Tyre Installation
Adoption Vote
This proposal (WP.29/2025/77), as amended by para. 72, was adopted by the World Forum. Thirty-six Contracting Parties out of the 58 applying UN R142 were present for the vote by AC.1. Thirty-six voted in favor with zero against and zero abstaining.
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UN R54: Proposal for a Supplement 28
Reference Number: WP.29/2025/71
Proposal to Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 1 Make editorial corrections to the type of tyre and additional service description definitions Clarify the definition of nominal rim diameter (in line with the proposal for amending UN R30) Amend the definition of principal grooves (in line with the proposal for amending UN R30 Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres) Introduce definition for free rolling tyre and front axle, and related revision of markings (ref. GRBP-80-03 and GRBP-80-26) Clarify the D_max requirement for snow tyres Simplify rhz wording of the requirements for professional off-road tyres Add an indication for whether a special use tyre is a professional off-road tyre to the communication form (in line with UN R30).
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 54 \| Commercial Vehicle Tyres
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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UN R75: Proposal for Supplement 21
Reference Number: WP.29/2025/72
Proposal to Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 5. align the categories of use to “normal tyre”, “snow tyre” and “specialuse tyre” in line with UN R30 and 54, to introduce a definition of “normal tyre” and consequently make use of the terms “snow tyre” and “special-use tyre” that are already defined reformat Annex 5, Table 7 to present the tyre-size designations in a consistent way and to provide explicitly that tyre-size designations from this table may also be used for tyres in bias-beltedvstructure Include the suffix “M/C” that is defined as mandatory for motor-cycle tyres with rim diameter code 13 and above in the figure illustrating the sidewall markings in Annex 3 and to present the markings in a clearer way Add provisions for the dimensional requirements of moped tyres Add a factor for the centrifugal radius of snow tyres and special-use tyres with a speed category above 210 km/h Give the footnotes in the main body of the regulation an unequivocal number to avoid confusion when referencing to a particular footnote Include several editorial corrections to increase the consistency of the text (e.g. consistent use of the terms defined in section 2, such as “tyre-size designation”, “load-capacity index”, “speed-category symbol”).
Meeting Sessions: 196th WP.29 session (23-27 Jun 2025)
Document date: 10 Apr 25
Document status: Adopted by WP.29
Relevant to: UN Regulation No. 75 \| Motorcycle and Moped Tires
Adoption Vote
This proposal (WP.29/2025/72), as amended by para. 72, was adopted by the World Forum. Thirty-four Contracting Parties out of the 52 applying UN R75 were present for the vote by AC.1. Thirty-four voted in favor with zero against and zero abstaining.
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