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UN R117: Proposal for amendments
Document GRBP/2021/12
30 June 2021

Proposal from the Worn Tyres working group to introduce a procedure and thresholds on wet grip performance for C1 tyres in worn state.

Status: Superseded
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Previous Documents, Discussions, and Outcomes
4.9. | Consideration of draft amendments to existing UN Regulations submitted by GRBP

132. The Chair of GRBP presented the draft amendments to UN Regulation No. 117 on wet grip of worn tyres (agenda item 4.9.1). The representative of Japan supported these amendments, pointed out their importance for road safety and called for continuation of the work of GRBP on this matter, in particular improving the test methods.

4.9.1. | Proposal for a new 03 series of amendments to UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
4.6. | Consideration of draft amendments to existing UN Regulations submitted by GRBP

78. The World Forum considered the draft amendments under agenda items 4.6.1, 4.6.3, 4.6.4 and 4.6.6 to 4.6.8. and recommended their submission to AC.1 for voting.

79. The World Forum recalled that it had accepted the request of the GRBP Chair to postpone to the June 2022 session consideration of the draft amendments under agenda items 4.6.2 and 4.6.9 (see para 60. above).

80. The representative of ETRTO proposed a modification to the draft amendments in ECE/TRANS/WP.29/2022/7 under agenda item 4.6.5 (WP.29-186-07). The representatives of the European Commission and the United Kingdom of Great Britain and Northern Ireland commented on the ETRTO proposal. Based on the received comments, the World Forum requested ETRTO to revise WP.29-186-07 and decided to postpone consideration of the draft amendments in ECE/TRANS/WP.29/2022/7 to the June 2022 session. In the interim, the World Forum requested the secretariat to arrange a written consultation of GRBP experts on the ETRTO proposal.

4.6.9. | Proposal for new 03 series of amendments to UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
7. (e) | UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

23. The expert from France, in her capacity of Co-Chair IWG WGWT, presented draft amendments that introduced a procedure and thresholds on wet grip performance for C1 tyres in worn state (ECE/TRANS/WP.29/GRBP/2021/12, as updated by GRBP-74-33-Rev.1). GRBP adopted GRBP-74-33-Rev.1 and requested the secretariat to submit it for consideration and vote at the March 2022 sessions of WP.29 and AC.1 as a new draft 03 series of amendments to UN Regulation No. 117. GRBP noted that, with the aim to complete the proposal and remove few square brackets, an informal document would be prepared for the next session. If adopted, this document would also be submitted to the March 2022 sessions of WP.29 and AC.1. GRBP noted that, to avoid possible uncertainty, the adopted draft Supplement 14 to the 02 series of amendments (see para. 21 above) would be explicitly included in the future WP.29 document with the new draft 03 series of amendments to UN Regulation No. 117.

Related and Previous Documents
WT-25-05
WT-25-04/Rev.1
WT-26-03
WT-26-04
WT-27-03
GRBP-74-33/Rev.1
WT-27-07
WP.29/2022/11
WP.29/2022/83
Relates to UN R117 |