I hate to write this because I love Costco. But consumers should be aware of the policy of this tire center. I recently bought tires here and (I thought) no problem. However, when I brought the car in for rotation and spin balance a few thousand miles later, a lug nut was missing on one of the tires. It had come off while I was driving. The techs noted that the lug was missing in the notes but didn't tell me in person and let me drive off without offering to sell me a new lug. I noticed it missing a 1,000 miles later. I am letting Costco management know about this awful situation.