UN R117 Standard Reference Test Tyre replacement
Document GRBP-71-06
17 January 2020

ETRTO proposal for the replacement of the current Standard Reference Test Tyre as it is being phased out as production will stop mid of 2020. Snow performance test in R117 currently requires SRTT14 as a reference tyre. SRTT14 needs to be replaced and test procedure amended.

Submitted by ETRTO
Status: Superseded
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Previous Documents, Discussions, and Outcomes
8. (c) | Clarifications

98. The expert from OICA introduced ECE/TRANS/WP.29/GRVA/2022/25, aimed at ensuring the continuity of the American Society for Testing and Materials (ASTM) Method E1337 for the measurement of the Peak Braking Coefficient (PBC) in UN Regulation No. 140, by introducing a reference to the new ASTM Standard Reference Test Tyre F2493.

99. The expert from Canada noted that a similar amendment had been introduced in the 01 series of amendments to UN Regulation No. 13-H. He inquired whether it would be needed for the original series too. The expert from OICA answered that it would make sense. The secretariat prepared the corresponding document, GRVA-14-55.

100. GRVA adopted ECE/TRANS/WP.29/GRVA/2022/25 and requested the secretariat to submit it as a supplement to the original version of UN Regulation No. 140 to WP.29 and AC.1 for consideration and vote at their March 2023 sessions.

101. GRVA adopted GRVA-14-55/Rev.1 and requested the secretariat to submit it as a supplement to the original version of UN Regulation No. 13-H to WP.29 and AC.1 for consideration and vote at their March 2023 sessions.

Related and Previous Documents
GRVA/2022/25
Relates to UN R117 |