I got about 52K on these 85K rated tires before they reached the 4/32 tread depth. Not sure why no one else received a credit from the manufacturer...maybe its the company that sold you the tires?? I had no problem getting another set...they gave me a $100.00 credit toward the new set. I kept up my end of the bargain by rotating and balancing...all free from Belle Tire in Hartland, Michigan. Even if I have to come in 52K miles later for another discounted set, I wouldn't complain one bit!