UN R117: Proposal for a Supplement
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Proposal to introduce provisions for “worn tyre” thresholds and test procedures.

Reference Number: GRB/2019/6
Origin: France
Date: 8 November 2018
Proposal Status: Formal GR review
Related Documents:
GRB-69-08 | UN R117: Amendment proposal to introduce of worn tyre provisions
GRB-69-09 | 2017 Ernst & Young study on used tyres
GRB-69-10 | UN R117: Comments on the proposal for worn-tyre provisions (GRB/2019/6)
Discussion(s):
Working Party on Noise | Session 69 | 23-25 Jan 2019

21. The expert of France proposed a wet adhesion requirement for C1 tyres in a worn state (ECE/TRANS/WP.29/GRB/2019/6 and GRB-69-08). The proposal received comments from ETRTO (GRB-69-10). GRB also noted a recent study on used tyres (GRB-69-09). GRB was of the view that this topic should be pursued in the framework of a new IWG and adopted its Terms of Reference (GRB-69-23), as reproduced in Annex V to the session report. Various experts expressed their willingness to contribute to the activities of the newly established IWG. The experts from France and the European Commission volunteered to act as Chair and Co-Chair, respectively, while ETRTO agreed to provide secretariat support.