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Document Title	UN R117: Response to the ETRTO comments on the proposal for stricter tyre noise limits
Reference Number	GRB-67-18
Date	24 Jan 2018
Source(s)	Netherlands
Rulemaking Area(s)	UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance
Meeting(s)	GRB \| Session 67 \| 24-26 Jan 2018 6. Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
Related Documents
	GRB-66-03		Proposal for amendments to the 02 series of amendments to Regulation No. 117 (superseded)
	GRB-67-08		UN R117: Assessment of the Netherlands proposal
Downloads
UNECE server	.pdf format		.pptx format
Excerpts from session reports related to this document
GRB \| Session 67 \| 24-26 Jan 2018			15. The expert from ETRTO assessed the latest proposals from the Netherlands for stricter tyre noise limits, as presented at the sixty-sixth session of GRB (GRB-67-08). He pointed out some limitations in the data subset used in the Dutch study and questioned the methodology used to derive the new proposed limits from the data subset. The expert from the Netherlands replied to the ETRTO comments (GRB-67-18). 16. The experts from Germany and OICA pointed out that the Dutch study had been based on tyre labels which might be incorrect. The expert from the Russian Federation drew the attention of GRB to the need for a holistic approach to the tyre rolling noise in the system “tyre/road surface”. The Chair noted two different approaches for tyre selection by the Netherlands and ETRTO: the Dutch study focused on the most popular tyres of several brands covering about 90 per cent of the market, while ETRTO was concerned about a much wider selection of brands to ensure market choice. 17. GRB invited the Netherlands, ETRTO and other stakeholders to work together with the aim to undertake a holistic study of tyres on the market. Finally, GRB agreed to resume the discussion at the next session. 15. The expert from ETRTO assessed the latest proposals from the Netherlands for stricter tyre noise limits, as presented at the sixty-sixth session of GRB (GRB-67-08). He pointed out some limitations in the data subset used in the Dutch study and questioned the methodology used to derive the new proposed limits from the data subset. The expert from the Netherlands replied to the ETRTO comments (GRB-67-18). 16. The experts from Germany and OICA pointed out that the Dutch study had been based on tyre labels which might be incorrect. The expert from the Russian Federation drew the attention of GRB to the need for a holistic approach to the tyre rolling noise in the system “tyre/road surface”. The Chair noted two different approaches for tyre selection by the Netherlands and ETRTO: the Dutch study focused on the most popular tyres of several brands covering about 90 per cent of the market, while ETRTO was concerned about a much wider selection of brands to ensure market choice. 17. GRB invited the Netherlands, ETRTO and other stakeholders to work together with the aim to undertake a holistic study of tyres on the market. Finally, GRB agreed to resume the discussion at the next session. 15. The expert from ETRTO assessed the latest proposals from the Netherlands for stricter tyre noise limits, as presented at the sixty-sixth session of GRB (GRB-67-08). He pointed out some limitations in the data subset used in the Dutch study and questioned the methodology used to derive the new proposed limits from the data subset. The expert from the Netherlands replied to the ETRTO comments (GRB-67-18). 16. The experts from Germany and OICA pointed out that the Dutch study had been based on tyre labels which might be incorrect. The expert from the Russian Federation drew the attention of GRB to the need for a holistic approach to the tyre rolling noise in the system “tyre/road surface”. The Chair noted two different approaches for tyre selection by the Netherlands and ETRTO: the Dutch study focused on the most popular tyres of several brands covering about 90 per cent of the market, while ETRTO was concerned about a much wider selection of brands to ensure market choice. 17. GRB invited the Netherlands, ETRTO and other stakeholders to work together with the aim to undertake a holistic study of tyres on the market. Finally, GRB agreed to resume the discussion at the next session.