GAR | GRBP/2019/19

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Document Title	UN R117: Proposal for an amendment
Reference Number	GRBP/2019/19
Date	8 Jul 2019
Summary	Proposal for an amendment to complement the content of working document GRVA/2018/5. The proposal includes amendments to: The Standard Reference Test Tyre (SRTT) denominations Remove the discrimination between the two Class C3 tyres Clarify that there are no C3 tyres in the scope of this UN Regulation "not marked with speed symbol" Align Annex 6 with the most recent amendments made to standard ISO 28580 Define "standard deviation" as appropriate in the text Clarify that, in the cases of C2 and C3 tyres, the “Reference (test) pressure” and the value “Pr” correspond to the indication of the inflation pressure which is always marked on the sidewall Use "repeatability" in lieu of inaccurate "reproducibility" Update test report forms Include the date on which the new proposed supplement of UN Regulation No. 117 will apply Improve the description of the evaluation of the rolling sound emission test Correct the figure in Annex 2, Appendix 2, and Update cross references pursuant to paragraph renumbering.
Source(s)	ETRTO
Rulemaking Area(s)	UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance
Proposal Status	Superseded
Meeting(s)	GRBP \| Session 70 \| 11-13 Sep 2019 6. (d) UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip) 6. (d) UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
Related Documents
	GRVA/2018/5		UN R117: Proposal for a Supplement (superseded)
	GRBP-70-21/Rev.2		UN R117: Modification to document GRBP/2019/19 (superseded)
	GRBP/2020/5		UN R109: Proposal for an amendment (superseded)
	WP.29/2020/6		UN R117: Proposal for Supplement 11 to the 02 series of amendments
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Excerpts from session reports related to this document
GRBP \| Session 70 \| 11-13 Sep 2019			14. The expert from ETRTO recalled the postponed proposal for amendments (ECE/TRANS/WP.29/GRVA/2018/5 and GRB-68-12) and presented complementary modifications (ECE/TRANS/WP.29/GRBP/2019/19, GRBP-70-21-Rev.2). Various experts posed clarifying questions, in particular, on the use of terms “repeatability” and “reproducibility”. Following an in-depth discussion, GRBP adopted the proposals, as amended by Annex III, and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their March 2020 sessions as a draft Supplement 11 to the 02 series of amendments to UN Regulation No. 117.