ISO 10231:2003 specifies test methods for verifying the capabilities of tyres for motorcycles, carried out in the laboratory under controlled conditions. The tests include a strength test for assessing the capability of the tyre structure with respect to breaking energy in the tread area, an endurance test for assessing the resistance of the tyre with respect to service at full load and moderate speed over long distances, a high-speed test for assessing the capability of the tyre as related to service at the maximum speed capability of the tyre (not applicable to tyres with a speed capability below 130 km/h), and a centrifugal growth test for assessing the maximum growth of the tyre under the influence of centrifugal forces at the maximum speed capability of the tyre (applicable only to road tyres with speed symbols P and above). ISO 10231:2003 is applicable to all motorcycle tyres. However, its test methods are not intended for gradation of tyre performance or quality levels.