This has become a familiar sight for me this past year or so. When the van was in the shop a couple months ago to get the winter tires off they pointed out to me that all four of my summer tires were different makes. I told them its because I keep replacing tires and nobody has the same ones in stock. I think I have now replaced 5 tires since moving to Alberta. It makes me wonder if the local tire shops are driving around the country roads dropping nails..