I am getting new tires. I got a question. I am replacing the ones in the back, because they measure with the gauge a 4. The ones up front an 8. These are all season radials. Some tires places say to rotate the tires upfront to the back for stopping power. Now, Sam's club is saying, that Goodrich makes you sign a waiver if you do that, because they want the new tires in the back, so your backend won't slip out from under you. Which is better? I was thinking of putting snow tires on the back, and Sam's won't do that either, unless, I buy all 4. Is this unsafe to do? Putting radials upfront, snow tires in the back? What do you guys do?