After the Gotthard Tunnel accident last year, Joint Network Secretariat (JNS) of European Union Agency for Railways had been doing their investigation titled " Procedure “Accident in the Gotthard base tunnel with focus on broken wheels”

The released report brings new recommendations for the wheels;

https://www.era.europa.eu/system/files/2024-07/JNS%20NP%20Gothard_Final%20report_v2.0.pdf