1990 VOLVO 240 Tires Problems

GOODYEAR VIVA 2 TIRES FROM WALMART HAVE GONE OUT-OF-ROUND REPEATEDLY. THE MECHANICS AT ANOTHER TIRE SHOP SAY THEY SEE THIS ALL THE TIME WITH WALMART GOODYEARS. I GAVE UP ON WARRANTY REPLACEMENTS, SINCE THEY ALSO FAIL, AND I HAVE TWO DAUGHTERS AND A WIFE DRIVING THESE CARS WITH FAILING TIRES. I SACRIFICED THE WARRANTIES AND PUT KUMHOS ON THE CARS. I HAVE 6 VOLVO 240S AND ALL OF THEM HAVE HAD FAILURES OF WALMART TIRES. GOODYEAR, DOUGLAS AND UNIROYAL. 185 -70 - 14. IN EVERY CASE THE TIRES GO OUT-OF-ROUND AND CANNOT BE BALANCED. THEY WOBBLE AND SHAKE, BECAUSE OF BUBBLES IN THE SIDEWALLS AND THE TREAD FACE, OR FLAT SPOTS IN THE TREAD FACE, WHERE THE BELTS OR BANDS INSIDE THE TIRE ARE SEPARATING AND THE TIRE STRUCTURE ITSELF IS FAILING. IN EVERY CASE THE TIRES ARE A FEW MONTHS OLD AND STILL HAVE THE BRAND NEW MOLD NIPPLES,...