# ISO 15222:2021 — Withdrawn and superseded ISO standards For ISO 15222:2021, item title is Truck and bus tyres — Method for measuring relative wet grip performance — Loaded new tyres; status code is 9599; successor is ISO 15222:2025; withdrawn / published date is 2021-11-19, recorded from its source on 2026-08-05. - **Identifier:** ISO 15222:2021 _(verified: appears in the quote below)_ - **Item title:** Truck and bus tyres — Method for measuring relative wet grip performance — Loaded new tyres _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 15222:2025 - **Withdrawn / published date:** 2021-11-19 _(verified: appears in the quote below)_ ## What the source says > 79041,IS,,ISO 15222:2021,Truck and bus tyres — Method for measuring relative wet grip performance — Loaded new tyres,Pneumatiques pour camions et autobus — Méthode de mesure de l'adhérence relative sur revêtement mouillé — Pneumatiques neufs en charge,2021-11-19,2,['83.160.10'],ISO/TC 31,9599,[55388],[87320],"['en','fr']",21,"

This document specifies the method for measuring relative wet grip braking performance index to a reference under loaded conditions for new tyres for use on commercial vehicles on a wet-paved surface.

The methods developed in this document are meant to reduce the variability. The use of a reference tyre is necessary to limit the variability of the testing metho ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).