Mr. Tire review: don;t stand behind their work

We bought 4 new Pirelli tires from Mr. Tire in Arlington, VA with a 60, 000 mile warranty. Two years and 20, 000 miles later, BOTH front tires are bubbling and the car is undriveable without replacing these tires. We called the Mr. Tire store, they pulled up the invoice and said there is no warranty on the tires. WRONG! It says there is 60, 000 mile warranty on the receipt. Once this genius ceded that there is a warranty, he told us there was nothing they could do about it. Finally, he said that if they do not replace tires, that the manufacturer is responsible for doing so. All this, and he NEVER even suggested we bring the care in for a look. Folks, do yourselves a favor and avoid Mr. Tire...unless of course, customer service and standing by product and workmanship are of no concern to you.