ISO 19447:2021
Passenger car tyres — Method for measuring ice grip performance — Loaded new tyres
This document specifies the method for measuring the relative ice grip performance index of a candidate tyre compared with a reference tyre under loaded conditions for new tyres intended to be used for passenger cars on surfaces made of ice.
This document applies to all passenger car tyres, except for T-type temporary-spare tyres.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
4.1 Braking on ice method for passenger car tyres
4.1.1 General
4.1.2 Test course
4.2 Vehicle
4.3 Standard reference test tyre
4.4 Tyre preparation
4.4.1 General
4.4.2 Stud protrusion measurement procedure
4.4.3 Tyre load and inflation pressure
4.4.4 Instrumentation
4.4.5 Testing order and braking test cycles
4.4.6 Test procedure
4.4.7 Data evaluation and presentation of results
4.4.8 Ice grip performance comparison between a candidate tyre and a reference tyre using a control tyre
Annex A (informative) Example of a possible test report of ice grip index for a passenger car tyre
Annex B (informative) Example of a test conditions calculation to perform an ice grip evaluation test
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
4.1 Braking on ice method for passenger car tyres
4.1.1 General
4.1.2 Test course
4.2 Vehicle
4.3 Standard reference test tyre
4.4 Tyre preparation
4.4.1 General
4.4.2 Stud protrusion measurement procedure
4.4.3 Tyre load and inflation pressure
4.4.4 Instrumentation
4.4.5 Testing order and braking test cycles
4.4.6 Test procedure
4.4.7 Data evaluation and presentation of results
4.4.8 Ice grip performance comparison between a candidate tyre and a reference tyre using a control tyre
Annex A (informative) Example of a possible test report of ice grip index for a passenger car tyre
Annex B (informative) Example of a test conditions calculation to perform an ice grip evaluation test
Bibliography