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).
| Agenda for the Worn Tyres working group workshop on water depth measurement |
| Reference Number: WT-49-01/Add.1 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 19 Jan 23 |
| 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 forthe 49th Worn Tyres working group session |
| Reference Number: WT-49-01 |
|
Agenda for review of the informal group status report to GRBP. The session separately includes a workshop on water depth measurement. |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 23 Jan 23 |
| 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-49-04/Rev.1 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 28 Jan 23 |
| 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 49th Worn Tyres working group session |
| Reference Number: WT-49-05 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 28 Jan 23 |
| 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 49th Worn Tyres working group session |
| Reference Number: WT-49-06 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 29 Jan 23 |
| 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 Worn Tyres informal group workshop session |
| Reference Number: WT-49-07 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 29 Jan 23 |
| 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: Test center water depth measurement experience-data collection template |
| Reference Number: WT-49-02/Rev.1 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 29 Jan 23 |
| 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 Worn Tyres working group workshop session (during 49th session) |
| Reference Number: WT-49-08/Rev.1 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 02 Feb 23 |
| 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: Template for method of water depth measurement by external watering |
| Reference Number: WT-49-10 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 02 Feb 23 |
| 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: Template for method of water depth measurement for self-watering |
| Reference Number: WT-49-12 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 02 Feb 23 |
| 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: Water depth measurement improvement |
| Reference Number: WT-49-11 |
| Submitted by: Michelin |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 01 Feb 23 |
| 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: Water depth measurement equipment-pros and cons |
| Reference Number: WT-49-09 |
| Meeting Sessions: 49th WT session (27 Jan 2023) |
| Document date: 02 Feb 23 |
| 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 50th Worn Tyres working group session |
| Reference Number: WDM-1-01 |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 15 Feb 23 |
| 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: Input on options for water depth measurement |
| Reference Number: WDM-1-02 |
| Submitted by: ETRTO |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 15 Feb 23 |
| 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 measurement method for self-watering: Template |
| Reference Number: WDM-1-05 |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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 50th Worn Tyres informal group session |
| Reference Number: WDM-1-07 |
|
Participation in the water-depth measurement workshop session. |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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 50th Worn Tyres informal group session (water-depth workshop) |
| Reference Number: WDM-1-07 |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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 |
| Contact-style water-depth (dynamic pin) measurement procedures |
| Reference Number: WDM-1-06 |
| Submitted by: Michelin |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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 measurement method for external watering: Template |
| Reference Number: WDM-1-04 |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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: Recommendations on water-depth measurement equipment |
| Reference Number: WDM-1-03 |
| Meeting Sessions: WDM-1 (20 Feb 2023) |
| Document date: 20 Feb 23 |
| 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 51st Worn Tyres working group session |
| Reference Number: WDM-2-01 |
|
Workshop on water depth measurement. |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 24 Feb 23 |
| 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: Water-depth measurement test plan |
| Reference Number: WDM-2-02 |
| Submitted by: JASIC |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 27 Feb 23 |
| 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 |
| Participants list from the 51st Worn Tyres working group session |
| Reference Number: WDM-2-06 |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 27 Feb 23 |
| 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 51st Worn Tyres working group session |
| Reference Number: WDM-2-05 |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 27 Feb 23 |
| 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: Template for water-depth measurement for self-watering |
| Reference Number: WDM-2-04/Rev.1 |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 02 Mar 23 |
| 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: Comments on water-depth measurement test plan |
| Reference Number: WDM-3-02 |
| Submitted by: ETRTO |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 20 Mar 23 |
| 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 |
| Agenda for the 52nd Worn Tyres working group session |
| Reference Number: WDM-3-01/Rev.1 |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 26 Mar 23 |
| 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 52nd Worn Tyres working group session |
| Reference Number: WDM-3-07 |
|
Third water-depth measurement workshop. |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 27 Mar 23 |
| 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 worn tyres water-depth measurement workshop |
| Reference Number: WDM-3-06 |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 27 Mar 23 |
| 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 |
| Nokian tyres water depth measurement procedure |
| Reference Number: WDM-3-03 |
| Submitted by: Nokian |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 27 Mar 23 |
| 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: Template for 2023 data collection |
| Reference Number: WDM-3-04/Rev.1 |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 27 Mar 23 |
| 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: Water-depth measurement equipment recommendations |
| Reference Number: WDM-2-03/Rev.1 |
| Meeting Sessions: WDM-2 (27 Feb 2023) |
| Document date: 27 Mar 23 |
| 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 |
| Reply to ETRTO comments and questions on JASIC document WT-51-02 |
| Reference Number: WDM-3-05/Rev.1 |
| Submitted by: JASIC |
| Meeting Sessions: WDM-3 (27 Mar 2023) |
| Document date: 27 Mar 23 |
| 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 |
| Agenda for the 50th Worn Tyres working group session |
| Reference Number: WT-50-01 |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 13 Apr 23 |
| 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 |
| External self-watering water depth comparison test procedure proposal |
| Reference Number: WT-50-02 |
| Submitted by: JASIC |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 07 Apr 23 |
| 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: Outcomes of water-depth measurement workshops |
| Reference Number: WT-50-03 |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 14 Apr 23 |
| 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 workplan and template for data collection |
| Reference Number: WT-50-04 |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 27 Mar 23 |
| 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 performance on new and worn tires (Buffing input) |
| Reference Number: WT-50-05 |
| Submitted by: EC |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 18 Apr 23 |
| 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 |
| Participation list from the 50th Worn Tyres working group session |
| Reference Number: WT-50-06 |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 24 Apr 23 |
| 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 50th Worn Tyres working group session |
| Reference Number: WT-50-07 |
| Meeting Sessions: 50th WT session (18 Apr 2023) |
| Document date: 24 Apr 23 |
| 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 51st Worn Tyres working group session |
| Reference Number: WT-51-01 |
| Meeting Sessions: 51st WT session (5 Jun 2023) |
| Document date: 05 Jun 23 |
| 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: Status of the test campaign |
| Reference Number: WT-51-02 |
| Meeting Sessions: 51st WT session (5 Jun 2023) |
| Document date: 06 Jun 23 |
| 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 51st Worn Tyres working group session |
| Reference Number: WT-51-04 |
| Meeting Sessions: 51st WT session (5 Jun 2023) |
| Document date: 06 Jun 23 |
| 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 51st Worn Tyres working group session |
| Reference Number: WT-51-03 |
| Meeting Sessions: 51st WT session (5 Jun 2023) |
| Document date: 10 Jun 23 |
| 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 52nd Worn Tyres working group session |
| Reference Number: WT-52-01 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 10 Jul 23 |
| 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 testing data sharing |
| Reference Number: WT-52-02 |
| Submitted by: ETRTO |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 14 Jul 23 |
| 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 group test campaign |
| Reference Number: WT-52-03 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 21 Jul 23 |
| 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 revisions to the Terms of Reference |
| Reference Number: WT-52-06 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 21 Jul 23 |
| 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 to GRBP |
| Reference Number: WT-52-07 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 21 Jul 23 |
| 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 52nd Worn Tyres working group session |
| Reference Number: WT-52-05 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 21 Jul 23 |
| Click here to view the full document file |
| Minutes of the 52nd Worn Tyres working group session |
| Reference Number: WT-52-04 |
| Meeting Sessions: 52nd WT session (20 Jul 2023) |
| Document date: 05 Aug 23 |
| 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 53rd Worn Tyres working group session |
| Reference Number: WT-53-01/Rev.1 |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 27 Nov 23 |
| 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 of New and Worn Tyres: Experimental results on C1, C2 and C3 tyres |
| Reference Number: WT-53-02 |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 29 Nov 23 |
| 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 post-processing task force status report |
| Reference Number: WT-53-03 |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 04 Dec 23 |
| 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 |
| Comments on the Wet Grip of New and Worn Tyres: Experimental results on C1, C2 and C3 tyres |
| Reference Number: WT-53-04 |
| Submitted by: ETRTO |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 04 Dec 23 |
| 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 |
| Participants list from the 53rd Worn Tyres working group session |
| Reference Number: WT-53-05 |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 06 Dec 23 |
| 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: Opinion on 2024-2025 test campaign |
| Reference Number: WT-53-07 |
| Submitted by: JASIC |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 06 Dec 23 |
| 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 53rd Worn Tyres working group session |
| Reference Number: WT-53-06 |
| Meeting Sessions: 53rd WT session (5 Dec 2023) |
| Document date: 12 Dec 23 |
| 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 |