# ISO 23671:2015 — Withdrawn and superseded ISO standards For ISO 23671:2015, item title is Passenger car tyres — Method for measuring relative wet grip performance — Loaded new tyres; status code is 9599; successor is ISO 23671:2021; withdrawn / published date is 2015-09-02, recorded from its source on 2026-08-05. - **Identifier:** ISO 23671:2015 _(verified: appears in the quote below)_ - **Item title:** Passenger car 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the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 23671:2021 - **Withdrawn / published date:** 2015-09-02 _(verified: appears in the quote below)_ ## What the source says > 65530,IS,,ISO 23671:2015,Passenger car tyres — Method for measuring relative wet grip performance — Loaded new tyres,Pneumatiques pour voitures particulières — Méthode de mesure de l'adhérence relative sur revêtement mouillé — Pneumatiques neufs en charge,2015-09-02,2,['83.160.10'],ISO/TC 31,9599,[36923],[73916],"['en','fr']",18,
ISO 23671:2015 specifies the method for measuring relative wet grip braking performance index to a reference under loaded conditions for new tyres for use on passenger cars on a wet-paved surface.
The methods developed are meant to reduce variability. The use of a reference tyre is necessary to limit the variability of the testing procedures.
ISO 23671 ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).