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UN R117: Proposal for an amendment
Document GRBP/2019/19
21 June 2019

Proposal for an amendment to complement the content of working document GRVA/2018/5. The proposal includes amendments to:

  1. The Standard Reference Test Tyre (SRTT) denominations
  2. Remove the discrimination between the two Class C3 tyres
  3. Clarify that there are no C3 tyres in the scope of this UN Regulation “not marked with speed symbol”
  4. Align Annex 6 with the most recent amendments made to standard ISO 28580
  5. Define “standard deviation” as appropriate in the text
  6. 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
  7. Use “repeatability” in lieu of inaccurate “reproducibility”
  8. Update test report forms
  9. Include the date on which the new proposed supplement of UN Regulation No. 117 will apply
  10. Improve the description of the evaluation of the rolling sound emission test
  11. Correct the figure in Annex 2, Appendix 2, and
  12. Update cross references pursuant to paragraph renumbering.

Submitted by ETRTO
Status: Superseded
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Previous Documents, Discussions, and Outcomes
4.6. | Consideration of draft amendments to existing UN Regulations submitted by GRBP
5. (c) | UN Regulation No. 109 (Retreaded tyres for commercial vehicles and their trailers)

17. The expert from BIPAVER presented a proposal that aligns the provisions for retreaded tyres marked with the three-peak-mountain snow-flake (3PMSF) symbol with the previously adopted amendment proposals to UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2020/5). GRBP adopted the document and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions as part of Supplement 10 to UN Regulation No. 109.

6. (d) | UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

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.

14. (a) | Tyres
Related and Previous Documents
GRVA/2018/5
GRBP-70-21/Rev.2
GRBP/2020/5
WP.29/2020/6
Relates to UN R117 |