GAR | WP.29/2025/73

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Document Title	UN R108: Proposal for Supplement 1 to the 01 series of amendments
Reference Number	WP.29/2025/73
Date	10 Apr 2025
Summary	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.Correct an omission Clarify the text of Annex 3: The positioning and order of the markings shall be as follows:....
Rulemaking Area(s)	UN R108 Retreaded Tires
Regulatory Impact	01 series of amendments \| Supplement 1
Proposal Status	Adopted by WP.29
Meeting(s)	WP.29 \| Session 196 \| 23-27 Jun 4.8.8. UN R108: Proposal for Supplement 1 to the 01 series of amendments
Related Documents
	GRBP/2025/15		UN R108: Proposal for a Supplement to the 01 series of amendments (superseded)
	GRBP-81-11/Rev.1		UN R108: Proposal to supersede document GRBP/2025/15 (superseded)
	GRBP/2024/24		UN R108: Proposal for a Supplement to the 01 series of amendments (superseded)
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