Proposal for Supplement 2 to the 03 series of amendments to UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
ECE/TRANS/WP.29/GRBP/77, para. 23, based on ECE/TRANS/WP.29/GRBP/2024/9 as amended by GRBP-79-22 and ECE/TRANS/WP.29/GRBP/2024/12 as amended by GRBP-79-49.
Documentation
WP.29/2024/72
UN R117: Proposal for Supplement 2 to the 03 series of amendments
UN R117: Proposal for Supplement 2 to the 03 series of amendments
Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped, to make editorial improvements and updates to ISO and ASTM standards references, and to align with Supplement 2 to the 04 series of amendments, including a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2 and to remove the content of the now obsolete Annex 4 as well as all its references.