UN R117: Proposal for Supplement 3 to the 04 series of amendments
Document GRBP/2025/13
4 December 2024
Proposal to
- Clarfy the scope to reflect that adhesion performance on wet surfaces (wet adhesion) is required not only for C1 tyres, but also C2 and C3 tyres
- Update standard reference to ASTM F2493-244, F3611-24, F3676-24, F3675-24 and ISO 4000-1:2024
- Align the definitions of tread groove and principal grooves with proposals for UN R30 and R54
- Simplify the wording of the requirements for professional off-road tyres
- Correct the transitional provision in paragraph 12.23. to specify approvals “first issued after 31 August 2028”.
Status: Formal GR review