Working Party on Noise and Tyres | Session 77 | 7-10 Feb 2023
Geneva
Agenda Item 5. (e)
UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

GRBP will be briefed on the activities of the IWG on Wet Grip Performance of Tyres in Worn State (IWG WGWT) and will consider amendment proposals by IWG WGWT that introduce a detailed reference for the molded standard reference test tyre (SRTT16).

GRBP will address a proposal for a new transitional provision which was submitted by the experts from the European Commission.

GRBP will consider corrections proposed by the expert from ETRTO.

At the previous session, GRBP adopted a package of amendment proposals to the 02, 03 and 04 series of amendments of UN Regulation No. 117 and agreed to check the consolidated documents for errors at this session (ECE/TRANS/WP.29/GRBP/74, paragraph 30). These documents will be prepared in December 2022 for submission to the March 2023 session of WP.29. Their numbers will be indicated in an updated provisional agenda to be issued at a later stage.

GRBP will consider amendment proposals, if any, to other UN Regulations on tyres.

Documentation
GRBP-77-03 Worn tyres: Revised Terms of Reference of the Informal Working Group on Wet Grip Performance for Tyres in a Worn State
GRBP-77-11 UN R117: Proposal for C1 tyre rolling noise temperature correction update
GRBP-77-12 UN R117: Rolling sound emission - C1 temperature correction proposal
GRBP-77-23 UN R117: Request for consideration of a special case during the 78th (August 2023) GRBP session (AAPC)
GRBP-77-30 WGWT status report to GRBP
GRBP-77-32 UN R117: Proposal to amend document GRBP/2023/5 (ETRTO)
GRBP/2023/2 UN R117: Proposal for amendments to Supplement 1 to the 03 series of amendments
GRBP/2023/3 UN R117: Proposal for amendments to the 04 series of amendments
GRBP/2023/5 UN R117: Proposal for amendments (EC)
GRBP/2023/8 UN R117: Proposal for amendments (ETRTO)