GRBP will be briefed on the activities of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT).
| GRBP-81-22 | WGWT informal group: Proposal to amend the terms of reference | |
| GRBP-81-23 | WGWT informal group status report to GRBP |
| GRBP-81-19 | UN R117: Measurement uncertainties reduction in rolling sound emission test method |
GRBP will address editorial corrections to the 02 and 04 series of amendments to UN Regulation No. 117 that were proposed by the expert from ETRTO.
| GRBP-81-08/Rev.1 | UN R117: Proposal to supersede document GRBP/2025/12 | |
| GRBP-81-09/Rev.1 | UN R117: Proposal to supersede document GRBP/2025/13 | |
| GRBP/2025/12 | UN R117: Proposal for Supplement 17 to the 02 series of amendments | |
| GRBP/2025/13 | UN R117: Proposal for Supplement 3 to the 04 series of amendments |
| GRBP-81-19 | UN R117: Measurement uncertainties reduction in rolling sound emission test method |
Should GRBP adopt the amendments proposals to the 04 series of amendments in ECE/TRANS/WP.29/GRBP/2025/13, they will be combined with the amendment proposal to the same series of amendments that was adopted at the previous session (ECE/TRANS/WP.29/GRBP/2024/23 as amended by GRBP-80-11).
| GRBP-80-11 | UN R117: Proposal for Supplement 3 to the 04 series of amendments | |
| GRBP/2024/23 | UN R117: Proposal for a Supplement 3 to the 04 series of amendments |
| GRBP-81-19 | UN R117: Measurement uncertainties reduction in rolling sound emission test method |
GRBP will wish to continue the discussion on the complexity and possible splitting of UN Regulation No. 117 and will be informed about considerations of the Group of Interested Experts established for that purpose.
| GRBP-81-26 | Group Of Interested Experts on UN R117 report to GRBP |
| GRBP-81-19 | UN R117: Measurement uncertainties reduction in rolling sound emission test method |