Discount Tire just lost my business

9 years is very old for a tire (even with less than 5k on them). dry rot and cracks may not be visible, but they are definetly brittle and almost certain to be out of round. balancing them with an off the car machine would most likely not be worth it and neither the customer or the business would leave happy. just my 2 cents. I work at an alignment shop. if you came in to our shop you would probably get the same answer. although I would be a little nicer about it