Car Tires, including spare tires, must be regularly checked every month. Check the surface of the car tire to see if there are cracks or scratches.
It's best to put on gloves and reach inside the tire to check for suspicious marks. As soon as you find anything suspicious, you should ask the car dealer to do a detailed check. Don't be reluctant to throw out a defective tire. If you find that the tire surface wear is not normal, you should think of the front alignment of the wheel may have problems, to repair.
