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).
| Russia note on the performance of worn tyres with regard to wet grip |
| Reference Number: WT-01-01 |
| Submitted by: Russia |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 11 Mar 19 |
| 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: Tyre industry working draft proposal |
| Reference Number: WT-01-03 |
| Submitted by: ETRTO |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 26 Apr 19 |
| 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 prescriptions to UN R117 |
| Reference Number: WT-01-04 |
| Submitted by: UTAC |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 29 Apr 19 |
| 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 first Wet Grip and Worn Tyres (WGWT) informal group session |
| Reference Number: WT-01-02/Rev.2 |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 29 Apr 19 |
| Click here to view the full document file |
| Draft minutes of the first WGWT informal group session |
| Reference Number: WT-01-05 |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 10 May 19 |
| 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 first WGWT informal group session |
| Reference Number: WT-01-06 |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 10 May 19 |
| 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 |
| Average Worn Profile of Tires in Europe |
| Reference Number: WT-01-07 |
| Meeting Sessions: 1st WT session (2-3 May 2019) |
| Document date: 10 May 19 |
| 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 2nd WGWT informal group session |
| Reference Number: WT-02-01/Rev.1 |
| Meeting Sessions: 2nd WT session (17 Jul 2019) |
| Document date: 16 Jul 19 |
| 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: Tyre industry work status |
| Reference Number: WT-02-02/Rev.1 |
| Submitted by: ETRTO |
| Meeting Sessions: 2nd WT session (17 Jul 2019) |
| Document date: 16 Jul 19 |
| 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: Tyre industry work status |
| Reference Number: WT-02-02/Rev.2 |
| Submitted by: ETRTO |
| Meeting Sessions: 2nd WT session (17 Jul 2019) |
| Document date: 30 Jul 19 |
| 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 2nd WT informal group session |
| Reference Number: WT-02-03 |
| Meeting Sessions: 2nd WT session (17 Jul 2019) |
| Document date: 30 Jul 19 |
| 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 buffing machine discussion presentation |
| Reference Number: WT-03-03 |
| Submitted by: CATARC and China |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 04 Sep 19 |
| 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: Worn tyre wet grip performance proposals |
| Reference Number: WT-03-02/Rev.1 |
| Submitted by: France and UTAC |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 05 Sep 19 |
| 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 3rd Worn Tyres working group session |
| Reference Number: WT-03-01/Rev.2 |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 10 Sep 19 |
| Click here to view the full document file |
| Draft minutes of the 3rd Worn Tyres working group session |
| Reference Number: WT-03-10 |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 27 Sep 19 |
| 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 |
| EU Sectoral Profile - Transport |
| Reference Number: WT-03-06 |
|
Statistical data on road transport from the EU. |
| Submitted by: EC |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 27 Sep 19 |
| 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 wet-grip performance: ongoing tests in France |
| Reference Number: WT-03-05 |
| Submitted by: UTAC |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 19 Sep 19 |
| 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 action list-France |
| Reference Number: WT-03-08 |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 27 Sep 19 |
| 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 wet traction work plan step 1 |
| Reference Number: WT-03-07 |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 27 Sep 19 |
| 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: Tyre Industry work plan proposal |
| Reference Number: WT-04-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 17 Oct 19 |
| 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: Japan test campaign |
| Reference Number: WT-04-03 |
| Submitted by: Japan |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 18 Oct 19 |
| 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 4th informal group on Worn Tyres session |
| Reference Number: WT-04-01/Rev.1 |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 18 Oct 19 |
| Click here to view the full document file |
| Worn tyres: Testing companies work plan |
| Reference Number: WT-04-04 |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 18 Oct 19 |
| 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 group timeline |
| Reference Number: WT-04-05 |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 18 Oct 19 |
| 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: Items to consider, including ageing |
| Reference Number: WT-04-06 |
|
EC recommendations based on the Study on some safety-related aspects of tyre use. |
| Submitted by: EC |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 18 Oct 19 |
| 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 3rd Working Tyres working group session |
| Reference Number: WT-03-09/Rev.1 |
| Meeting Sessions: 3rd WT session (10-11 Sep 2019) |
| Document date: 21 Oct 19 |
| Click here to view the full document file |
| Minutes of the 4th Worn Tyres working group session |
| Reference Number: WT-04-07/Rev.1 |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 21 Oct 19 |
| 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 |
| Participants list from the 4th Worn Tyres working group session |
| Reference Number: WT-04-08 |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 21 Oct 19 |
| Click here to view the full document file |
| Worn tyres: Industry work plan proposal |
| Reference Number: WT-04-02/Rev.1 |
| Submitted by: ETRTO |
| Meeting Sessions: 4th WT session (18 Oct 2019) |
| Document date: 31 Oct 19 |
| 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 5th Worn Tyres working group session |
| Reference Number: WT-05-01 |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 12 Nov 19 |
| Click here to view the full document file |
| Worn tyres: ETRTO input for the informal group work plan |
| Reference Number: WT-05-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 20 Nov 19 |
| 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: Capacity assessment of the test centers |
| Reference Number: WT-05-03 |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 26 Nov 19 |
| 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 informal group tyre selection |
| Reference Number: WT-05-04 |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 26 Nov 19 |
| 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 report of the 5th Worn Tyres informal group session |
| Reference Number: WT-05-05 |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 26 Nov 19 |
| 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 informal group timeline |
| Reference Number: WT-05-06 |
| Meeting Sessions: 5th WT session (20 Nov 2019) |
| Document date: 26 Nov 19 |
| 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 tyre selection for the Worn Tyres working group program |
| Reference Number: WT-06-03 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 10 Dec 19 |
| 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 6th Worn Tyres working group session |
| Reference Number: WT-06-01/Rev.3 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 12 Dec 19 |
| Click here to view the full document file |
| RMA (USTMA) data on scrap tire chronological age |
| Reference Number: WT-06-06 |
| Submitted by: USTMA |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 10 May 06 |
| 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 |
| Tire Aging: A Summary of NHTSA’s Work |
| Reference Number: WT-06-07 |
| Submitted by: NHTSA |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 12 May 14 |
| 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 |
| ITMA tyre selection for the Worn Tyres working group |
| Reference Number: WT-06-05 |
| Submitted by: ITMA |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 11 Dec 19 |
| 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 |
| Work plan of the Worn Tyres working group |
| Reference Number: WT-06-02/Rev.1 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 18 Dec 19 |
| 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 |
| Macro Gantt chart for the Worn Tyres work program |
| Reference Number: WT-06-04/Rev.1 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 18 Dec 19 |
| 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 6th Worn Tyres working group session |
| Reference Number: WT-06-08 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 18 Dec 19 |
| 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 6th Worn Tyres working group session |
| Reference Number: WT-06-09 |
| Meeting Sessions: 6th WT session (12 Dec 2019) |
| Document date: 18 Dec 19 |
| Click here to view the full document file |