2015 Starcraft RV Fw Solstice

ON 14 AUG 2015, WHILE TRAVELING SOUTH ON CA14 THE FIRST BLOW-OUT OCCURRED WHEN WE HAD OWNED THE TRAILER 9 MONTHS, USED IT 3 TIMES AND ONLY PUT 3,922 MILES ON THE TRAILER. LUCKILY, NO DAMAGE OCCURRED TO THE TRAILER. SUBSEQUENT TO THAT, ON 11 OCT 2015, WE STARTED ON A SHORT 5-DAY VACATION WHEN A SECOND TIRE BLEW WHILE TRAVELING SOUTH ON I215, WITH 4,253 MILES TRAVELED ON THE TRAILER. THE SECOND TIRE HAD THE SAME MARKINGS AS THE FIRST, TOW MAX STR POWER KING ST 235/80R16, TIRE: DOT 8385 GPB, MANUFACTURED IN 4213. BOTH BLOW-OUTS WERE ON THE STREET SIDE TIRES, THE FIRST TIRE THE REAR AND THE SECOND TIRE WAS THE FRONT. THE TIRE PRESSURE OF EACH TIRE WAS CHECKED AFTER REPLACING THE 2ND BLOWN-OUT TIRE AND MEASURED 82 PSI FOR EACH TIRE. FIVE HOURS EARLIER, I HAD MADE SURE THE TIRE PRESSURE ON EACH ON-AXEL TIRE AND THE SPARE MEASURED 80 PSI. AT THE TIME OF THE BLOW-OUT, WE HAD TRAVELED 145 MILES WITH THE TEMPERATURE RISING ABOUT 20 DEGREES TO NEAR 100 DEGREES. ON THE RETURN TRIP, AS USUAL, AT THE START I INSPECTED THE TIRES AND ENSURED THE TRAILER TIRES WERE PROPERLY INFLATED TO 80 PSI. AT A FUEL STOP ON US395 JUST OFF I15, 133 MILES INTO THE TRIP HOME, BEING VERY CAUTIOUS ABOUT THE TIRES, I FOUND THE REAR CURBSIDE TRAILER TIRE'S TREAD WAS CROWNING. THE ONLY DIFFERENCE BETWEEN THIS TIRE AND THE TWO THAT HAD BLOW-OUTS WAS THE MANUFACTURER'S DATE WAS 4313.