Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.
20. The expert from ETRTO introduced a new design of the C3 Standard Reference Test Tyres (SRTTs) that are used as reference tyres for snow grip and wet adhesion performance (GRBP-78-28-Rev.1). The expert for Japan posed a question. The Chair invited ETRTO to submit a working document for consideration at the next session.
| GRBP-78-28/Rev.1 | |
| GRBP-79-10 | |
| GRBP-79-07 | |
| GRBP-79-09 | |
| GRBP-79-23 | |
| GRBP-79-23 | |
| GRBP-79-23 | |
| GRBP-79-23 | |
| GRBP-79-23 | |
| GRBP-79-23 | |
| WP.29/2024/73 |