GRBP will receive a progress report of the Task Force on Tyre Abrasion (TF TA) and will consider its proposal for a Supplement to the 04 series of amendments to UN Regulation No. 117 that introduces test methods to measure tyre abrasion.
Documentation
GRBP-79-02
Noise measurement uncertainties status report to GRBP
Noise measurement uncertainties status report to GRBP
GRBP/2024/4
UN R117: Proposal for Supplement 2 to the 04 series of amendments (ETRTO)
UN R117: Proposal for Supplement 2 to the 04 series of amendments
Proposal to reduce noise measurement variability, completing the amendment proposal adopted at the seventy-eighth session of the Working Party on Noise and Tyres (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).
GRBP/2024/8
Measurement uncertainties when testing in UN Regulations under the purview of GRBP
Measurement uncertainties when testing in UN Regulations under the purview of GRBP
Proposal from the Measurement Uncertainties informal group for a Document for Reference providing a general approach on how to handle measurement uncertainties in UN Regulations (initially addressing UN Regulations Nos. 51 and 117).
GRBP/2024/9
UN R117: Proposal for Supplement 2 to the 03 series of amendments (ETRTO)
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.
GRBP/2024/12
UN R117: Proposal for Supplement 2 to the 03 series of amendments (ETRTO)
UN R117: Proposal for Supplement 2 to the 03 series of amendments
Proposal for 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.