Got these new on an Audi S4 lease return, less than 16K miles and one went flat, not slowly, but dead. put on lift to pull tire, tread separated from casing, not one but FOUR were separating. Had to replace 4 tires after 16,000 and less than a year. No response from Riken, Michelin (whom distributes) ran away fast since they don't manufacture, just distributed. No warranty, poor quality, dangerous, 4 of 4 bad tires, not worth risking your life. Spend another 100 and get something safer, or spend less and get sumitomo, but safety is far more important than saving $20 per tire.