So I had a nail in the tire which caused a slow leak. The tire was purchased from Discount Tire along with there certificate. The certificate includes free tire repair. My tire is just over 10 years old so they would not repair it. I take the tire to another large tire shop and the other location repair the tire for 12 bucks and says it still has 16K miles of use. The tires are still good. I've never been a fan of discount tire. Discount tried to sell me 4 new tires when I still had some life on the old tires.