The tires that come on this vehicle are poor quality. There is still a lot of tread left on the remaining 3 tires. The tire that needed replaced started to leak slowly. After doing research on the tires, there were reviews from others with the same tire. The tires put on the vehicle are only sold to the manufacturer and cannot be purchased privately. It was not a valve stem leak, the sidewall was weak and had failure. I ended up on the side of a road in the middle of a rural area on my way to a business appointment.