5 tire failures in 24 months and 26833 miles. 2 were "broken tread" failures and 3 were flats. of the flats 2 were in the same tire within 1 week with no obvious nail or other foreign material in the tire. as a result i replaced all 4 tires with another brand and have had no further problems. the first "broken tire occurred at around 7700 miles, the second broken tire at 10700 miles. flats occurred at around 7800 miles and 26800 miles. *tr