Document Number GRBP/2025/16
1 2 3 4 5 6 7 8 9 10
Document title UN R109: Proposal for a Supplement to the 01 series of amendments
Date 5 Dec 2024 Proposal to:
  1. Correct the description of a tyre to exclude aspects outside the scope of UN R109
  2. Clarify the definition of nominal rim diameter
  3. Clarify the definition of principal grooves in line with the proposal for UN R54
  4. 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
  5. Simplify the wording of the requirements for professional off-road tyres
  6. 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.
Source(s) ETRTO
Status Superseded
Rulemaking area(s)
Meeting(s)
Related documents
GRBP-81-12/Rev.1 UN R109: Proposal to supersede document GRBP/2025/16 (Superseded)
GRBP-81-13/Rev.1 Supporting material for ETRTO working documents
WP.29/2025/74 UN R109: Proposal for Supplement 1 to the 01 series of amendments (Adopted)
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