In the past when it was time to buy new tires I would find a set of all season tires that were either 80K or 100K mile rated and I would replace all 4 at one time. However, I have found over the years this may not be the best, or most economical way of replacing tires. It doesn't seem to matter what brand or model of tires I buy, I rarely have all 4 last the full mileage rating of the tires. One tire will either develop a thump, or a tire will blow, or something else happens where I have to replace at least one of the tires. So I have decided to go with a different strategy. My new strategy is buying the least expensive tires I can find, which usually means tires that are 35K or 40K mile rated tires. It also includes replacing only the tires that need to be replaced. I'm tired of throwing away good tires that have several thousands of miles left on them just because I want a new set of tires. Like right now, I have two good tires on the rear of my car, but the fronts need to be replaced before winter, so that's what I'm gonna do. It also means I get new tires twice as often, which we all know how much nicer new tires ride as compared to tires that have started the hardening process after they get to be a year or two old. And when one of these tires goes bad they're only a $50 or $60 tire as opposed to a $100 or $120 80K or 100K rated tire.