I bought a used cx5 last summer, 2014 GS. Two weeks ago I got a flat that I had repaired at Costco. The Costco manager pointed out that the tires I had are size 225 60 17, and that they should be 225 65 17. I have a separate set of winter tires on rims so I use these tires April to November. Should I change them for new 225 65 17 tires or keep these and whats the difference? Thanks