PURCHASE A SET OF PIRELLI P4 TIRES DOT XL 886A 3017 195/65R15 SIX MONTHS AGO AND KEPT GOING BACK TO FIX THE TIRE. IT KEPT LOOSING AIR AND GOING FLAT. SO AFTER THE SIX MONTHS PAST I HAD A BLOW OUT OF THE SAME TIRE THAT WAS GOING FLAT. AND IT ALMOST KILL ME.