What is ISO 23671 about?
ISO 23671 discusses about Passenger Car Tyres. ISO 23671 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 specifies detailed technicalities such as methods for measuring wet grip index, general test conditions, and measures the relative wet grip index on a commercialized vehicle, on a trailer or a tyre test vehicle.
Note 1: ISO 23671 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).
Who is ISO 23671 for?
ISO 23671 on relative wet grip performance for passenger car tyres are useful for
- Four wheelers and two-wheelers Tyre manufacturer
- Automotive industry
- Dealers and suppliers of Tyres
Why should you use ISO 23671?
The passenger tire is the most commonly used and cost-effective tire type available. Passenger tires are typically used in passenger cars and minivans.
ISO 23671 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. ISO 23671 helps its buyers, to manufacture tyres with enhanced quality of the passenger car tyres, which reduces the risk factors ensuring the safety of the users on wet surfaces.
ISO 23671 guides you with the general test conditions for measuring the wet grip braking performance along with measurement of tyre wet grip on commercialized vehicles and tyre test vehicles.
What’s changed since the last update?
BS ISO 23671:2021 supersedes ISO 23671:2015, which is withdrawn.
The main changes compared to the previous edition are as follows:
- The method accuracy and reproducibility has been improved by updating the formulae
- Coefficients for wet grip index calculation;
- The method of track validation has been revised to be done only with 16 in SRTT instead of with BPN or 14 in SRTT,
- The wet grip performance measurement using a control tyre in case of vehicle method has been withdrawn.
