My Goodyears started showing small weather cracks in the sidewalls at 4,000 miles and not even a year old. Went straight to the Goodyear tire dealer who called Goodyear and had them replace all x7 tires at no charge. /// I also just had Michelin adjust out some 265 75 16's that had 30,000 on them and were 3yrs old at Discount Tire. Michelin had them measure the tread and came with 30% wear. They gave a 70% discount on x4 new tires. Michelin has a 6 year warranty on materials and workmanship and they just charged me for the tread wear. These tires were also showing cracks in the sidewalls. Your dealer will usally send you to the tire dealer for tire issues. The problems I used not to see with tires until 7 yrs or better are common now days,guess the quality of workmanship and materials are a thing of the past. Im looking at Toyos for my next set.