I purchased a certified pre-owned 2006 Cadillac STS (V6 with Performance/Luxury Package). It has the factory issued Michelin MXM4 tires (front: 235/50/17 rear: 255/45/17). Since I’ve owned it has made a higher pitched rubbing noise when the wheel is turned significantly (for example, while turning into my driveway). I thought all along this was a tire issue, but the tire shop said it isn’t and now it’s out of warranty.
What is this sound? Is it normal? Is it worth repairing?