Originally Posted by slammedm3
how come the 19s have Continental rubber and not PS2s ?
This has been asked repeatedly over the last several months. BMW completed a deal with Conti to supply the OEM 19 tires for the M3. Most of the new M3s delivered within the last 6 months, or so, have been on Conti tires.
It is fairly routine for manufacturer to switch tire suppliers or use multiple suppliers. Corvette recently dumped Goodyear in favor of Michelin.