LOL come on man,you did NOT go anywhere near 300 mph in a gt6+ nor has anyone for that matter,not to mention that still today we don't have tires capable of this! Today's highest speed rated tires thanks to the autobahn and real world testing is only 186 mph and at 300 mph todays tire has a life span of around 4 min at best and the older tires would have blown apart long before that!