The Bridgestone AllSeason WeatherPeak 225/50R 18 tire tread was worn out at 15800 miles. Tires were rotated and alignment performed routinely at Firestone. Inflation was checked every two weeks. Many complaints for this issue by other customers. Early tread wear is dangerous and will cause accidents. How could this tire have a 700 tread rating and who is performing the test for the 700 tread rating?