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ISO 23671:2021

Passenger car tyres — Method for measuring relative wet grip performance — Loaded new tyres

Jun 15, 2021

General information

90.20     Apr 15, 2026

ISO

ISO/TC 31

International Standard

83.160.10  

English   French  

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Scope

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 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.
This document applies to all passenger car tyres except for:
—    special-use tyres marked with "ET";
—    T-type temporary spare tyres;
—    tyres fitted with additional devices to improve traction properties (e.g. studded tyres).

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 23671:2015

NOW

PUBLISHED
ISO 23671:2021
90.20 Standard under periodical review
Apr 15, 2026

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