GRBP will be briefed on the activities of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT).
GRBP will consider updates for the reference years in international standard specifications that were tabled by the experts from ETRTO.
| GRBP/2026/6 | UN R117: Proposal for a Supplement 4 to the 04 series of amendments |
As agreed at its previous session, GRBP will revert to the test requirements for ice grip tyres under the wet ice conditions (ECE/TRANS/WP.29/GRBP/80, para. 11).