Costco - should I buy tires there?

[space-time]

mikebw wrote:
... we bought a 5th matching wheel and tire which fits fine in the spare area of the trunk, and got rid of the small spare. I rotate all 5 tires on my own now, although I'm sure they would do it there.

my tires have a direction of rotation, I cannot move from one side to another, only front to back and vice versa.