2003 BMW 745LI Tires Problems

FAMILY & I HAD BEEN IN VANCOUVER BC FOR VACATION. WE BEGAN OUR RETURN TRIP HOME, CROSSED THE CANADIAN PEACE ARCH BORDER INTO THE US @ APPROXIMATELY 9PM WEDSNESDAY EVENING. ABOUT 1AM EARLY THURSDAY MORNING WE HEARD A LOUD NOISE COMING FROM THE RIGHT REAR, FOLLOWED BY OUR VEHICLE SUDDENLY LOOSING CONTROL & SWERVING IN ALL 3 LANES OF INTERSTATE 5 SOUTHBOUND. WE PULLED OVER ON THE LEFT SHOULDER AS IT WAS THE QUICKEST ROUTE TO SAFETY. WE CALLED FOR HELP, ONCE A STATE TROOPER ARRIVED WE INSPECTED THE VEHICLE & LEARNED OUR RIGHT REAR TIRE HAD BLOWN, WE ALSO NOTICED A LEAKING FLUID FROM THE VEHICLE. ONCE THE TOW TRUCK ARRIVED & STARTED TO PULL THE VEHICLE ONTO HIS FLATBED, WE LEARNED THE RIGHT REAR RIM HAD COMPLETELY SPLIT, & THE ENTIRE INNER LIP ASSEMBLY WAS MISSING. WE ARRIVED AT A PORTLAND OREGON DEALERSHIP AROUND 3 AM AND WAITED...

I LEASE A BMW 745LI. THE LEASE BEGAN MAY 15, 2003. OVER THE LAST FEW MONTHS THREE TIRES HAD TO BE REPLACED. THE LAST TWO WENT FLAT AS A RESULT OF DRIVING AT NIGHT OVER A LOW CURB (A SMALL ISLAND IN THE CENTER OF THE ROAD APPROXIMATELY 4 INCHES HIGH) THAT HAD BEEN INSTALLED SINCE I LAST TRAVELED THAT ROUTE. BOTH TIRES ON THE DRIVERS SIDE WENT FLAT. I HAD STOPPED FOR A TRAFFIC LIGHT BEHIND TWO OTHER CARS AND DID NOT SEE THE CURB (I HAVE PICTURES). SINCE I WAS ACCELERATING FROM A STOP THE SPEED OF THE CAR WAS SLOW AS THE TIRES WENT OVER THE CURB. THE TIRES COULD NOT BE REPAIRED AND HAD TO BE REPLACED AT A COST OF OVER $800. OTHER CARS WENT OVER THE SAME CURB WITH NO CONSEQUENCES. I BELIEVE THESE TIRES ARE DEFECTIVE OR ARE NOT APPROPRIATE FOR THIS CAR....