If you are using directional tires, they can be rotated only from the front to rear axles, not side to side unless they are remounted on the wheels. Rotation is very important for optimum wear, but it might not be practical for all cars. Two top-rated tires from Michelin (the Defender T+H all-season tire and CrossClimate2 all-weather tire in the performance all-season category) projected out to 85,000 miles of tread life in CR’s test. To give every tire a fair shot at achieving its wear potential, the test tires were measured, rotated, and pressure-checked every 1,000 miles, along with the vehicle being treated to an alignment.įrom this extensive test program, we found that high-scoring all-season tires last about 55,000 to 85,000 miles performance all-season tires, between 50,000 and 85,000 miles. ![]() These road warriors typically operated two shifts a day, excluding weekends and holidays. We tested 64 tires for a total of 1,024,000 tire miles. Last year, eight almost identical Toyota Camrys were used in our treadwear test over a six-month period. ![]() (Incidentally, the 55-year-old government grading program was created when many tires lasted just 15,000 to 20,000 miles.) Given that several tested all-season and performance all-season tires are expected to last for 60,000 miles or more, we think our extended test is better at projecting tread life. That is far more than the distance used for the government’s 7,200-mile treadwear test used to assign a treadwear index under the Uniform Tire Quality Grading System. We test all tires to 16,000 miles, excluding winter/snow tires.
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