I've never had a problem getting Discount Tire to match the Tire Rack price.
When I've bought wheels and tires, I do buy from Tire Rack.
A while back Discount said they couldn't get the tires I wanted so I bought from Tire Rack and took them in to my usual Discount. The manager asked why I didn't just buy from them and I told him they said they couldn't get them. He got rather pissed at one of their employees
