| UN R117: Supplement 13 excerpts relevant to worn tyres |
| Reference Number: WT-21-04 |
| 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 |
| WT-21-04 |