UN R109: Proposal for a Supplement to the 01 series of amendments
Document GRBP/2025/16
5 December 2024
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.
Status: Formal GR review