The Working Party on Noise and Tyres held its eighty-fourth session from 2-4 September 2026 in Geneva. GRBP adopted a draft new Supplement to the 02 series and a draft new Supplement to the 04 series of amendments to UN R117, and agreed to submit these to WP.29 and AC.1 for consideration and vote at their March 2027 sessions. GRBP adopted the content of a proposal for a new supplement to UN R64 and agreed to postpone submission to WP.29 until further notice. GRBP adopted revised Terms of Reference for the IWG on Real Driving-Additional Sound Emission Provisions with extended mandate until February 2028.

Proposal introduces the definition of “dual fitment” which is missing in the current text and improves the readability of the text by using only the wording “dual fitment”, mentioning the alternative wording “twin fitment” in a note.
Solves problem of type approving LT tyres with load-capacity index greater than or equal to 122 and suitable for dual fitment.