I have always been a big fan of Costco, but I will no longer purchase tires and batteries from them. Part of the agreement in buying tires from Costco is that they are suppose to rotate and re-balance. Well, my experience in the past few years is that they always find something wrong and refuse to rotate and balance the tires. I wind up taking them to Discount Tire and they will do the work and most of the time without charge, regardless of whether I purchased them there or not. Costco will only fix flats if you purchase the tire from any of their stores. Discount Tire will fix flats anytime, without charge no matter where I purchased the tires. They even fixed a wheelbarrow tire for me at no charge. Costco will not install new batteries. Sam's Club will and most of time are a bit cheaper.
Discount Tire stores in the Rocky Mountain and Pacific states are plentiful Even more stores than Costco's.