Note that the MX4's do have a 60 month treadwear warranty. However(!), this warranty is voided if the tires are not rotated according to a specific schedule. I bought my tires from my Lexus dealership and after less than 30K miles they recommended that I replace them. I asked why tire rotation was never mentioned when I came in for my regular service (always done at the same dealer) and they said that they only rotate tires if requested by the customer. Not to exonerate Michelin, but if it is a condition of the warranty AND if I bought my tires at the same dealership where I get my vehicle serviced, then they should be knowledgeable about the warranty requirements and at least mention tire rotation when I bring it in for service. I will try the Yokohamas going forward but I will not be buying them from the dealership.