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5. (a) UN Regulation No. 117 (Tyre Rolling Resistance, Rolling Noise and Wet Grip)

GRBP will address amendment proposals on the test conditions for ice grip tyres that were submitted by the expert from Japan.

GRBP/2025/26 | UN R117: Proposal for Supplement 4 to the 04 series of amendments

GRBP will be briefed on the activities of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT).