This group was authorized in 2019 to consider the performance of tyres after initial use. The broad concern is to ensure that somewhat worn tyres continue to comply with the requirements for new tyre approvals (i.e., no serious degradation in performance after initial use and before such wear as would require tyre replacement).
| Draft minutes of the 11 December WGWT working group session with test centers |
| Reference Number: WT-17-02 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 05 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| SRTT 16" tread depth wear evolution measurements |
| Reference Number: WT-16-03/Rev.2 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 05 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Surface roughness studies on buffed tires: Lateral Scanning vs Circumferential Scanning |
| Reference Number: WT-17-03 |
| Submitted by: JATMA |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 05 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft agenda for the 17th Worn Tyres working group session |
| Reference Number: WT-17-01 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 14 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| SRTT 16" tread depth wear evolution measurements |
| Reference Number: WT-16-03/Rev.3 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 19 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Status of the Worn Tyres working group work plan |
| Reference Number: WT-17-04 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 20 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 17th Worn Tyres working group session |
| Reference Number: WT-17-06 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 20 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft Worn Tyres working group status report to GRBP |
| Reference Number: WT-17-07 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 20 Jan 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft agenda for the 18th Worn Tyres working group session |
| Reference Number: WT-18-01 |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 17 Feb 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Draft buffing procedure evaluation sheet |
| Reference Number: WT-18-04 |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 22 Feb 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: C2 and C3 considerations |
| Reference Number: WT-18-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 21 Feb 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 18th Worn Tyres working group session |
| Reference Number: WT-18-05 |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 02 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres working group work plan status |
| Reference Number: WT-18-03 |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 02 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 18th Worn Tyres working group session |
| Reference Number: WT-18-06/Rev.1 |
| Meeting Sessions: 18th WT session (22 Feb 2021) |
| Document date: 02 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Final minutes of the 17th Worn Tyres working group session |
| Reference Number: WT-17-08/Rev.1 |
| Meeting Sessions: 17th WT session (19 Jan 2021) |
| Document date: 01 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 19th Worn Tyres working group session |
| Reference Number: WT-19-01/Rev.1 |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 22 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Concept for C2 and C3 tyres |
| Reference Number: WT-19-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 22 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Worn tyres: Wet grip test issue |
| Reference Number: WT-19-04 |
|
Presentation on wet grip test issue concerning to use of SRTTworn for RRT. |
| Submitted by: CATARC |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 23 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 19th Worn Tyres working group session |
| Reference Number: WT-19-05 |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 23 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Effect of Tyre Mean Texture Depth on µ peak and Average Deceleration |
| Reference Number: WT-17-05/Rev.1 |
| Submitted by: JASIC |
| Meeting Sessions: 17th WT session (19 Jan 2021) and 19th WT session (23 Mar 2021) |
| Document date: 23 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Minutes of ETRTO-CATARC discussion on 9 March 2021 |
| Reference Number: WT-19-03 |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 25 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft minutes of the 19th Worn Tyres working group session |
| Reference Number: WT-19-06 |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 25 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Status of the Worn Tyres working group work plan |
| Reference Number: WT-19-07 |
| Meeting Sessions: 19th WT session (23 Mar 2021) |
| Document date: 25 Mar 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 20th Worn Tyres informal group session |
| Reference Number: WT-20-01 |
| Meeting Sessions: 20th WT session (20 Apr 2021) |
| Document date: 16 Apr 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Consolidated comments on C2/C3 worn tyres wet grip test proposal |
| Reference Number: WT-20-02 |
| Meeting Sessions: 20th WT session (20 Apr 2021) |
| Document date: 21 Apr 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Worn Tyres informal group work plan status |
| Reference Number: WT-20-03 |
| Meeting Sessions: 20th WT session (20 Apr 2021) |
| Document date: 27 Apr 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft minutes from the 20th Worn Tyres informal group session |
| Reference Number: WT-20-05 |
| Meeting Sessions: 20th WT session (20 Apr 2021) |
| Document date: 27 Apr 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 20th Worn Tyres working group session |
| Reference Number: WT-20-04 |
| Meeting Sessions: 20th WT session (20 Apr 2021) |
| Document date: 27 Apr 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Supplement 13 excerpts relevant to worn tyres |
| Reference Number: WT-21-04 |
| Meeting Sessions: 21st WT session (21 May 2021) |
| Document date: 18 May 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Draft agenda for the 21st Worn Tyres working group session |
| Reference Number: WT-21-01/Rev.2 |
| Meeting Sessions: 21st WT session (21 May 2021) |
| Document date: 20 May 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Results of buffing procedure evaluations |
| Reference Number: WT-21-05 |
| Meeting Sessions: 21st WT session (21 May 2021) |
| Document date: 20 May 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Supplement 13 to UN R117 |
| Reference Number: WT-21-03/Rev.1 |
| Meeting Sessions: 21st WT session (21 May 2021) |
| Document date: 21 May 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Draft minutes of the 21st Worn Tyres working group session |
| Reference Number: WT-21-06 |
| Meeting Sessions: 21st WT session (21 May 2021) |
| Document date: 28 May 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 22nd Worn Tyres group session |
| Reference Number: WT-22-01 |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 14 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Draft Supplement 13 to the 02 series of amendments |
| Reference Number: WT-22-02/Rev.1 |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 15 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 22nd Worn Tyres working group session |
| Reference Number: WT-22-06 |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 20 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft presentation on worn tyres post processing provisions |
| Reference Number: WT-22-05 |
| Submitted by: ETRTO |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 20 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft minutes from the 3rd Worn Tyres Post Processing subgroup session |
| Reference Number: WT-22-04 |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 20 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 22nd Worn Tyres working group session |
| Reference Number: WT-22-03 |
| Meeting Sessions: 22nd WT session (15 Jun 2021) |
| Document date: 20 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Comments on the draft provisions for worn tyre wet grip |
| Reference Number: WT-23-04 |
| Submitted by: Netherlands |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 21 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Comments on the draft provisions for worn tyres |
| Reference Number: WT-23-03 |
| Submitted by: ETRTO and JASIC |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 21 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 23rd Worn Tyres working group session |
| Reference Number: WT-23-01 |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 20 Jun 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for amendments |
| Reference Number: WT-23-06 |
|
Proposal to introduce a procedure and thresholds on wet grip performance for tyres in worn state for C1 tyres as submitted to GRBP by the Worn Tyres working group. |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 01 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 23rd Worn Tyres working group session |
| Reference Number: WT-23-05 |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 01 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft minutes of the 23rd Worn Tyres working group session |
| Reference Number: WT-23-07 |
| Meeting Sessions: 23rd WT session (21 Jun 2021) |
| Document date: 01 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 24th Worn Tyres working group session |
| Reference Number: WT-24-01 |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 28 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres Post Processing status report |
| Reference Number: WT-24-02 |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 28 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Draft proposal for amendments to UN R117 |
| Reference Number: WT-24-05 |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 30 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 24th Worn Tyres working group session |
| Reference Number: WT-24-03 |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 30 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Draft minutes of the 24th Worn Tyres working group session |
| Reference Number: WT-24-04 |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 30 Jul 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 25th Worn Tyres working group session |
| Reference Number: WT-25-01 |
| Meeting Sessions: 25th WT session (23 Aug 2021) |
| Document date: 09 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Water depth vs SRTT Average μpeak |
| Reference Number: WT-24-06/Rev.1 |
| Submitted by: JASIC |
| Meeting Sessions: 24th WT session (29-28 Jul 2021) |
| Document date: 24 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 25th Worn Tyres informal group session |
| Reference Number: WT-25-03 |
| Meeting Sessions: 25th WT session (23 Aug 2021) |
| Document date: 30 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: 03 series (wet adhesion of C1-class tyres in worn state with buffed SRTTworn) transitional provisions draft |
| Reference Number: WT-25-04 |
| Meeting Sessions: 25th WT session (23 Aug 2021) |
| Document date: 30 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres working group revised terms of reference proposal |
| Reference Number: WT-25-05 |
| Submitted by: EC |
| Meeting Sessions: 25th WT session (23 Aug 2021) |
| Document date: 30 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Minutes of the 25th Worn Tyres working group session |
| Reference Number: WT-25-02 |
| Meeting Sessions: 25th WT session (23 Aug 2021) |
| Document date: 31 Aug 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 26th Worn Tyres working group session |
| Reference Number: WT-26-01 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 07 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres Post Processing task force report to the Worn Tyres working group |
| Reference Number: WT-26-02 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 07 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: 03 series (wet adhesion of C1-class tyres in worn state with buffed SRTTworn) transitional provisions draft |
| Reference Number: WT-25-04/Rev.1 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 07 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| UN R117: Proposal to amend document GRBP/2021/12 |
| Reference Number: WT-26-04 |
|
Proposal to maintain the performance stages for the following reasons:
|
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 08 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| UN R117: Proposal to amend document GRBP/2021/12 |
| Reference Number: WT-26-03 |
|
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 08 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Minutes of the 26th Worn Tyres working group session |
| Reference Number: WT-26-07 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 09 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 26th Worn Tyres working group session |
| Reference Number: WT-26-05 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 09 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres working group planning schedule |
| Reference Number: WT-26-06 |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 09 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Proposal for amendments to the Worn Tyres working group terms of reference |
| Reference Number: WT-26-08 |
| Submitted by: Japan |
| Meeting Sessions: 26th WT session (8 Sep 2021) |
| Document date: 09 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 27th Worn Tyres working group session |
| Reference Number: WT-27-01 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 09 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres working group draft status report |
| Reference Number: WT-27-02 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 10 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Amendments to document GRBP/2021/12 |
| Reference Number: WT-27-03 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 10 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| UN R117: Proposal for amendments to GRBP/2021/12 |
| Reference Number: WT-27-07 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 11 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| View full document file for more information |
| Click here to view the full document file |
| Attendance list from the 27th Worn Tyres working group session |
| Reference Number: WT-27-04 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 11 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres working group status report to GRBP |
| Reference Number: WT-27-06 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 11 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 27th Worn Tyres working group session |
| Reference Number: WT-27-05 |
| Meeting Sessions: 27th WT session (10 Sep 2021) |
| Document date: 11 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 28th Worn Tyres working group session |
| Reference Number: WT-28-01 |
| Meeting Sessions: 28th WT session (15 Sep 2021) |
| Document date: 11 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Proposal for revised Worn Tyres working group terms of reference |
| Reference Number: WT-28-03 |
| Submitted by: ETRTO |
| Meeting Sessions: 28th WT session (15 Sep 2021) |
| Document date: 14 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 28th Worn Tyres working group session |
| Reference Number: WT-28-04 |
| Meeting Sessions: 28th WT session (15 Sep 2021) |
| Document date: 16 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: New proposal C1 WGI @ Worn Molded SRTT |
| Reference Number: WT-28-02/Rev.1 |
| Meeting Sessions: 28th WT session (15 Sep 2021) |
| Document date: 17 Sep 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 29th Worn Tyres working group session |
| Reference Number: WT-29-01/Rev.1 |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 08 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Position on ETRTO Proposal for Correction Equations (Revision 2) |
| Reference Number: WT-29-02 |
| Submitted by: Japan |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 08 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Wet Grip Index Equation and Coefficients |
| Reference Number: WT-29-03 |
|
Worn Wet grip Index equation proposed by ETRTO on 25 October |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 08 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyre Post Processing task force status report |
| Reference Number: WT-29-04 |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 08 Nov 21 |
| Click here to view the full document file |
| Attendance list from the 29th Worn Tyres informal group session |
| Reference Number: WT-29-05 |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 16 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 29th Worn Tyres informal group session |
| Reference Number: WT-29-06 |
| Meeting Sessions: 29th WT session (9 Nov 2021) |
| Document date: 16 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 28th Worn Tyres working group session |
| Reference Number: WT-28-05/Rev.1 |
| Meeting Sessions: 28th WT session (15 Sep 2021) |
| Document date: 24 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Wet Grip on Worn C1 tyres: Threshold definition approach considerations |
| Reference Number: WT-30-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 26 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 30th Worn Tyres informal group session |
| Reference Number: WT-30-01 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 26 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 30th Worn Tyres informal group session |
| Reference Number: WT-30-03 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 30 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Additional test campaign and necessary quantity of "molded SRTT worn" |
| Reference Number: WT-30-04 |
| Submitted by: JASIC |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 30 Nov 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for 3 December 2021 Worn Tyres informal group follow-up discussion |
| Reference Number: WT-30-08 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 02 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Proposal for additional Worn Tyres group test campaign |
| Reference Number: WT-30-06 |
| Submitted by: JASIC |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 03 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn Tyres: Proposal for SRTT evaluation workplan |
| Reference Number: WT-30-07 |
| Submitted by: ETRTO |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 03 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 30th Worn Tyres informal group session |
| Reference Number: WT-30-05 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 07 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the follow-up to the 30th Worn Tyres informal group session |
| Reference Number: WT-30-09 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 07 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes from the follow-up to the 30th Worn Tyres informal group session |
| Reference Number: WT-30-10 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 08 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Proposal for Worn Tyres additional test campaign for minimum assessment |
| Reference Number: WT-30-11 |
| Meeting Sessions: 30th WT session (29 Nov 2021) |
| Document date: 08 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Agenda for the 31st Worn Tyres working group session |
| Reference Number: WT-31-01 |
| Meeting Sessions: 31st WT session (15 Dec 2021) |
| Document date: 13 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Minutes of the 31st Worn Tyres informal group session |
| Reference Number: WT-31-04 |
| Meeting Sessions: 31st WT session (15 Dec 2021) |
| Document date: 21 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Attendance list from the 31st Worn Tyres informal group session |
| Reference Number: WT-31-02 |
| Meeting Sessions: 31st WT session (15 Dec 2021) |
| Document date: 21 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| Worn tyres: Proposal for additional text campaign for minimum assessment |
| Reference Number: WT-31-03 |
| Submitted by: JASIC |
| Meeting Sessions: 31st WT session (15 Dec 2021) |
| Document date: 21 Dec 21 |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |