Composants du véhiculeCanada: Update to TSD 139 on Parasitic Tread Block Chunking (PTBC)
Canada: Update to TSD 139 on Parasitic Tread Block Chunking (PTBC) Canada has published an update public consultation on Technical Standard Document (TSD) 139, New Radial Ply Tires. This amendment follows feedback received during the winter tire consultation, which concluded on 18 February 2025. During the consultation, manufacturers raised concerns regarding the endurance test...








