In case you're interested, I once had a customs agent get out of his booth and look at my tires. He then asked if I had any work done on the car that I hadn't declared. They were a line carried only by Canadian Tire so that was the end of the discussion. I looked at the prices for Goodyear Allegra at Canadian Tire on their current sale and dealers in Buffalo for the similar tire - about the same price. And the Canadian Tire version includes installation and a warranty that includes rotation and fixing flats. On the other hand, buying a car in the US can save you thousands. My last purchase saved $7,000 on a $35,000 car. But the dealers in the US are being restrained more and more from selling to Canadians.