Tire companies in general don't give a warranty to the OEM - they warrant to the end user. This has become more of a problem lately as companies have dropped product lines. For example you can say you have Goodyear ag tires, but Goodyear sold their ag line to Titan some time back. Titan has the molds with the Goodyear name, but there is more to it. Tire molds have inserts so brand names can be changed by changing an insert. When I got tired of the problems I was having with one tire supplier, our purchasing department made a deal with a different supplier. When I asked the new supplier where my tires were going to be built, they told me that although they are a popular name, they have no plants. They had 3 companies in mind that had facilities that could handle my special tire size, all in South Africa, and would select the plant based on open capacity at the time. So saying one brand always makes bad tires in today's environment - you have to be able to read the code on the tire sidewall (another mold insert). Tire suppliers have been pretty good about taking care of their problems for me - both personal cars/trucks/equipment and my role with 3 large OEMs.