A little over four months ago, I had a flat tire replaced on my 2008 Jeep Patriot. On the way I home I noticed a vibration around 35-40 mph. There was also an occasional “thunk” from somewhere underneath the vehicle. I took it back to the tire store 2-3 days later, and they rebalanced the tires. No help. Took it back again again a couple of weeks later, and they could not find the problem. They recommended I take it to a dealer. It was a month or so before I could get it in to the dealer, and they replaced some worn parts in the drive train. (Sorry, I don’t recall exactly what they replaced; I’m an idiot at this stuff.) Still the vibration. Took it back to the dealer, by now about 4 months after the tire was replaced, and after having it in the shop for two days, they finally noticed that the replacement tire was the wrong size – didn’t match the mfr specs and (probably more importantly) didn’t match the other three tires. They replaced all four tires, which were now worn and worn unevenly. The replaced the rear toe adjusters and one lower control arm. And alligned it, of course. Total bill for all the work done by the dealer, including the orignial work and the new tires, is pushing $2500. Originally, the dealer blamed the worn toe adjusters and lower control arm on the wrong-sized tire, but once I started asking them for information to use against the tire dealer, they crawfished and said the only thing that the tire dealer should be responsible for was the tires and alignment. I took the vehicle and the old tires back to the tire dealer and asked them to refund what I paid for the replacement tire, pay me a prorated portion of the replacement for the other three tires, and pay for the alignment. (Which I thought was very reasonable.) They haven’t given me an answer yet, but the manager claims that having one wrong-sized tire would not affect the other tires, that the uneven wear on those tires was caused by the worn parts that the dealer replaced (toe adjusters and lower control arm).
So how much of the damage could have been caused by the wrong-sized tire?