TOKYO (Jan. 2, 2003) — Yokohama Rubber Co. Ltd. has agreed formally to participate in a joint effort with Continental A.G. and Bridgestone Corp. to develop run-flat tire systems, finalizing a deal announced initially in October 2002.©
Tokyo-based Yokohama said that as part of the agreement inked in December, it will help develop and promote the Support Ring version of run-flat technology for passenger cars and sport-utility vehicles. Like Continental and Bridgestone, Yokohama will include the Support Ring symbol with its corporate logo.
In January 2002, Continental and Bridgestone began sharing information to create global standards for run-flat tire systems for use in passenger cars and light trucks. As part of that agreement, the tire makers decided to share their run-flat technology, yet also continue to develop and market those systems independently.
The affected technologies included Bridgestone's Self Supporting Run-flat Tire (SSR) and Continental's Conti Safety Ring run-flat system (CSR).