TOKYO (April 20, 2012)—Yokohama Rubber Co. Ltd. said it has been accredited to ISO/IEC 17025 for four types of tire testing—all related to the EU tire labeling requirements.
This accreditation means that Yokohama's test data within the accredited scope are internationally recognized as being based on proper testing techniques, and allows the company to use a logo signifying accreditation on its published test reports.
The accreditation was carried out by Perry Johnson Laboratory Accreditation Inc.
The four specific procedures now accredited are:
— Marking requirements, dimensional requirements, and load/speed performance tests of tires for passenger cars (maximum speed more than 270 km/h);
— Rolling resistance testing of tires for passenger cars and light-trucks (load index of 104 or less) using force method;
— Adhesion performance testing on wet surfaces of tires for passenger cars using a special vehicle; and
—Coast-by testing for measuring tire-rolling sound emission of tires for passenger cars and commercial vehicles of load index of 121 or less.