Bridgestone Americas Tire Operations says DriveGuard tires are the first full line of mass-market replacement tires available for coupes, sedans and wagons not originally equipped with run-flat tires. Featuring specially designed run-flat technology, DriveGuard tires give drivers the ability to continue driving up to 50 miles at maximum speeds of 50 mph. DriveGuard tires are available in the United States and Canada for coupes, sedans and wagons with TPMS, and come with a 50,000- to 60,000-mile tread wear warranty. DriveGuard tires are available in 32 sizes, 15- to 19-inch rim diameters and 35 to 65 series.