Discount Tires will check and fill your tire pressure for free, while you wait, anytime. That's a nice service. I found out that they will also repair your flat tire for free. That's a great service. I had them repair a flat. The tire had a huge drill bit sticking in it. Over the next week the tire lost air so I returned and left the car for them to take a look. They called an hour later to tell me that they had replaced that tire, free of charge, since they did not repair it right the first time. I hadn't purchased the tire there nor did I have their road hazard coverage. They just gave me a new tire valued at over $150. That's above-and-beyond customer service. 3232 E. Cactus Rd., PHX