2004 MAZDA MAZDA6 Tires Problems

I PURCHASED NEW TIRES AND HAD INSTALLED AT COSTCO ON AUGUST 1ST 2016. I WENT TO HAVE THE TIRES RETORQUED AT COSTCO ON AUGUST 12TH. ON SEPT 1ST I WAS DRIVING NORTHBOUND ON A CITY PARKWAY STREET SO MOSTLY STRAIGHT ROADWAY WITH SOME GENTLE CURVES AT APPROX. 50-55 MILES PER HOUR, WHEN SUDDENLY MY STEERING WHEEL STARTED TO SHAKE, THEN WEAVING LEFT TO RIGHT, I TRIED TO REGAIN CONTROL BY STEERING STRAIGHT AND APPLY BRAKES TO SLOW DOWN BUT THAT JUST MADE IT WORSE AND THE CAR BEGAN SPINNING OUT OF CONTROL ACROSS THE ROADWAY UNTIL IT FINALLY LANDED TO A STOP ON THE BANK OFF THE SIDE OF THE ROAD. SEVERAL PEOPLE STOPPED AT THE SCENE TO MAKE SURE I WAS OK. A COUPLE THAT LIVED NEAR BY SAID THEY HEARD A LOUD BOOM...A POLICE OFFICER ALSO CAME AND STAYED WITH ME WHILE I WAITED FOR THE TOW TRUCK....

CONTINENTAL TIRE EXTREME CONTACT, SIDEWALL SEPARATION W LESS THAN 100 MILES. REPLACEMENT TIRE HAD TREAD SEPARATION WITHIN 24 HOURS. IF EITHER WAS NOT NOTICED A BLOWOUT AND VEHICLE DAMAGE WAS SOON. *TR

CONTINENTAL TIRE EXTREME CONTACT, SIDEWALL SEPERATION W LESS THAN 100 MILES. REPLACEMENT TIRE HAD TREAD SEPERATION WITHIN 24 HOURS. IF EITHER WAS NOT NOTICED A BLOWOUT AND VEHICLE DAMAGE WAS SOON. *TR

GOODYEAR EAGLE GT TIRE SIDEWALL SPLITTING/TEARING. I PURCHASED FOUR NEW GOODYEAR GT TIRES, SIZE 215/50R-17 FROM RETAILER DISCOUNT TIRE IN CHARLOTTE, NC. ON MARCH 13, 2010 I NOTICED THAT THE DRIVER'S FRONT-TIRE WAS SPLITTING ON THE SIDEWALL. THESE "SPLITS" APPEARED ALONG THE "GOODYEAR" BRAND AREA, AROUND APPROXIMATELY SEVENTY-FIVE PERCENT OF THE TIRES SIDEWALL AREA. *TR