
Backside on one tire
So we just purchased this new (used) car. I did a basic walk around but didn’t get on the ground to look underneath the car. Once I did, however, I just saw this on the backside of one of the tires. All the others look normal. what causes this, and does it need to be replaced now? The tread’s not terrible but I was also hoping to not having to get new tires right away