ISO/TC 31/SC 3 - Passenger car tyres and rims

This document specifies the designation, contour and dimensions of 5° tapered (drop-centre) rims primarily intended for passenger cars.

This document specifies the designation, dimensions, and load ratings of metric-series tyres primarily intended for passenger cars.

This document specifies test methods for verifying the capabilities of tyres for passenger cars. Of the test methods presented, it is possible that only some will be required depending on the construction of the tyre (diagonal, bias-belted, radial or T-type construction) to be tested. The tests are carried out in a laboratory under controlled conditions. This document includes endurance tests, a low-pressure performance test, high-speed tests and requirements for bead unseating and tyre strength. The test methods presented in this document are not intended for gradation of tyre performance or quality levels. This document applies to all passenger car tyres.

This document describes spare unit substitutive equipment (SUSE) for passenger car tyres, which is designed to enable users to continue their journey (with or without a stop) in a reasonably safe manner. NOTE 1 Certain equipment becomes effective automatically, thus avoiding the need to stop the vehicle immediately for inspection and corrective action. This document is intended only to qualify the performance of SUSE systems. Its specifications only apply to SUSE systems that can permit the extended mobility of the vehicle. NOTE 2 Other types of SUSE are described in Annexes A and B. The specifications in this document apply from the moment the SUSE system becomes effective, with the driver continuing to control the vehicle (in terms of speed and direction) in an attempt to reach an appropriate place for servicing. The following are within the scope of this document: — the description of the various types of SUSE; — the description and performance levels of complete SUSE systems. NOTE 3 The performance level that the user reasonably has the right to expect, as well as the restrictive conditions placed upon that level, can vary to a large degree depending on the equipment installed and on the real operating conditions of the tyre in flat-tyre running mode. The following are outside the scope of this document: — the vehicle to be equipped; — the tyre while operating in inflated mode; — the characteristics of the pressure survey device and of the warning function relative to the inflated mode or to the partially deflated mode due to slow pressure losses; — the transitory phase, if any, before the equipment becomes effective; — the inspection, assessment, and the servicing of the SUSE system, after it has been activated in flat tyre running mode.

ISO 19940:2017 specifies the testing method for determining the tyre stiffness index of passenger car tyres for the products capable of supplying the vehicle with the basic tyre functions, at least, at a speed of 80 km/h (50 mph) and a distance of 80 km when operating in flat tyre running mode, as per ISO 16992. This method is meant to determine the above mentioned index, for the characterization of the expected tyre's stiffness through its air and structural components. To reach the target, the vertical force and the vertical deflection, in the sense of absolute position in Z direction under different operating conditions, are measured (approximated in case of zero inflation pressure) and combined through the metrics defined in this document. This method is not intended to be used for conventional tyres.

This International Standard specifies two methods for measuring, under loaded conditions, the rolling circumference and revolutions per unit distance (kilometres) of new tyres for use on passenger cars. The first is a drum method that consists of loading a test tyre mounted on a free axle against a driven road wheel, or drum, of specified diameter. The second involves using a vehicle whose drive axle is equipped with the test tyres driven on a straight, paved road. This International Standard is applicable to all passenger car tyres. However, the values obtained from the measurements are not intended to be used as benchmarks for performance or quality.

ISO 4000-1:2015 specifies the designation, dimensions, and load ratings of metric-series tyres primarily intended for passenger cars.

ISO 4000-2:2013 specifies the designation, contour and dimensions of 5° tapered (drop-centre) rims primarily intended for passenger cars.

ISO 4000-1:2013 specifies the designation, dimensions and load ratings of metric-series tyres primarily intended for passenger cars.

ISO 4000-1:2010 specifies the designation, dimensions and load ratings of metric-series tyres primarily intended for passenger cars.

ISO 16992:2010 describes spare unit substitutive equipment (SUSE) for passenger car tyres, which is designed to enable users to continue their journey (with or without a stop) in a reasonably safe manner. ISO 16992:2010 is intended only to qualify the performance of extended mobility systems. Its specifications only apply to extended mobility systems that can permit the extended mobility of the vehicle. The specifications in ISO 16992:2010 apply from the moment the extended mobility system becomes effective, with the driver continuing to control of the vehicle (in terms of speed and direction) in an attempt to reach an appropriate place for servicing. The following are within the scope of ISO 16992:2010: the description of the various types of SUSE; the description and performance levels of complete extended mobility systems. The following are outside the scope of ISO 16992:2010: the vehicle to be equipped; the tyre while operating in inflated mode; the characteristics of the pressure survey device and of the warning function relative to the inflated mode or to the partially deflated mode due to slow pressure losses; the transitory phase, if any, before the equipment becomes effective; the inspection, assessment, and the servicing of the extended mobility system, after it has been activated in flat tyre running mode.

ISO 10191:2010 specifies test methods for verifying the capabilities of tyres for passenger cars. Of the test methods presented, it is possible that only some will be required depending on the type of tyre to be tested. The tests are carried out in a laboratory under controlled conditions. ISO 10191:2010 includes a strength test for assessing the capability of the tyre structure, with respect to braking energy, in the tread area. A second test, the bead unseating test, assesses the resistance of the tyre to bead unseating. It applies to tubeless tyres only. A third test, the endurance test, assesses the resistance of the tyre with respect to service at full load and moderate speed over long distances. The fourth test, the high speed test, assesses the capability of the tyre according to its speed category. The test methods presented in ISO 10191:2010 are not intended for gradation of tyre performance or quality levels. This International Standard applies to all passenger car tyres.

ISO 4000-1:2007 specifies the designation, dimensions and load ratings of metric-series tyres primarily intended for passenger cars.

ISO 4000-2:2007 specifies the designation, contour and dimensions of 5° tapered (drop-centre) rims primarily intended for passenger cars.

ISO 16992:2006 describes spare unit substitutive equipment (SUSE) for passenger car tyres. This equipment is designed to allow the user to continue on the journey (with or without a stop) in a reasonably safe manner. ISO 16992:2006 only aims to qualify the performance of extended mobility systems. It details specifications only for extended mobility systems suitable to permit the extended mobility of the vehicle. Other types of SUSE are described in the informative annexes. ISO 16992:2006 applies from the moment the extended mobility system becomes effective, and the driver has continued control of the vehicle (in speed and direction) in order to attempt to reach an appropriate place for servicing. ISO 16992:2006 does not cover the vehicle thus equipped; the tyre while operating in inflated mode; the characteristics of the pressure survey device and of the warning function relative to the inflated mode or to the partially deflated mode due to slow pressure losses; the transitory phase, if any, before the equipment becomes effective; the inspection, assessment, and the servicing of the extended mobility system after it has been activated in flat tyre running mode. ISO 16992:2006 includes the description of the various types of SUSE; the description and performance levels of complete extended mobility systems.

ISO 23671:2006 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 the variability. The use of a reference tyre is necessary to limit the variability of the testing procedures. ISO 23671:2006 applies to all passenger car tyres.

Gives the designation, dimensions and load ratings of the metric series of tyres for passenger cars. Replaces the fifth edition, which has been technically revised.

Contains test methods for verifying the capabilities of tyres for passenger cars. The tests are carried out in a laboratory under controlled conditions and are related to the strength test of the tread area with respect to braking energy, the endurance test with respect to full load and over long distances and the high speed test according to the speed category. Replaces the first edition, which has been technically revised.

Cancels and replaces the first edition (1987). Specifies the designation, contour and dimensions of 5° tapered (drop-centre) rims primarily intended for passenger cars. The designation, dimensions and load ratings of tyres (metric series) are given in ISO 4000-1.

Specifies the following test methods for new pneumatic tyres: force method, torque method, power method, deceleration method. Annex A considers test equipment tolerances, Annex B optional test conditions, Annex C measurement methods of moment of inertia for drum and tyre assembly for the deceleration method.