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UN R108: Proposal for Supplement 1 to the 01 series of amendments
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Reference Number: WP.29/2025/73
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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:….
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Document date: 10 Apr 25
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Document status: Adopted by WP.29
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Relevant to
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Adoption Vote
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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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