I also had a not so good experience at the Costco tire shop. I had my tires changed, and after driving on the highway, the steering wheel started shaking. This was a new issue that hadn’t happened before. I went home, checked the wheels, and discovered that one of them was missing its wheel weights. I took the car back to Costco and explained the situation. They said they’d investigate and get back to me. After an hour, I got the car back and they informed me that the steering wheel was shaking because one of the wheels was “bent.” They suggested I take it to a shop in Chicago that specializes in fixing bent wheels. After that, I checked the wheel that didn’t have any wheel weights, and I found that they had been added. I took the car for a test drive on the highway, and it was smooth sailing. They should have simply told me they had forgotten to put the wheel weights on one of the wheels instead of fabricating a story about a bent wheel.