Altoona Big O Tires put on tires that were too small for my SUV. Upon discovery of the mishap, a few months later when a bubble appeared on one of the tires, which they fully admitted the car was not safe to drive with those tires, all four needed to be replaced, they refused to put the right tires on without me paying full price because I did not buy the tire warranty. They wouldn't even prorate it. Never ever use Big O Tires! They do not stand behind their work. So I bought new tires at Firestone.
Recommendation: Go anywhere else!