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							UN R109: Proposal for Supplement 1 to the 01 series of amendments
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							Reference Number: WP.29/2025/74
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								 Proposal to:  
- Correct the description of a tyre to exclude aspects outside the scope of UN R109
  
- Clarify the definition of nominal rim diameter
  
- Clarify the definition of principal grooves in line with the proposal for UN R54
  
- Amend para. 6.4.4.2. to clarify that the UN R117 certificate may be used for obtaining the type approval under UN R172 of retreaded tyres classified as traction tyre
  
- Simplify the wording of the requirements for professional off-road tyres
  
- 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.
 
 
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							Meeting Sessions: 196th WP.29 session (23-27
				Jun)
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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.29/2025/74) was adopted by the World Forum.  Thirty-three Contracting Parties out of the 54 applying UN R109 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
								
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								View full document file for more information
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