It’s time to trade in the old ride, so you’re doing everything you can to make your car look good for that trade-in value. You have excavated 4 years’ worth of drive thru bags out of the back seat, you’ve steam cleaned the seat where your dog has laid for every trip, you’ve washed it, and you’ve even polished and waxed the outside. You might have even bought a bottle of snake oil from the auto parts store in hopes of making that knocking sound go away, if only long enough to get the car traded. So, you pull up to the lot, start talking to the salesman and he wants to see your trade. He steps out and looks at it, you know he knows that you’ve spent time making it look trade-worthy, and the first thing out of his mouth is, “Yeah, those tires are looking pretty rough. Mmhmm. Lots of tire tread wear there.” Arrrgh!