I was parked at a shopping center parking lot and a couple of people pulled up next to me as I was leaving and told me that my rear tire looked really low. I got out to check it out and it did seem a little low...not flat...but I thought that it would be a good idea to check it out. There is a tire repair center near where I was so I drove over to have it checked. The tire pressure on the passenger rear tire was 10 psi. I had the tech pull the tire off to check for leaks. The tech found two places that were leaking air and showed me some very significant wear on the inside of my rear passenger side tire. The places leaking were in the worn area of the inside side wall of the tire, (the tread was visible all around the inside wall where the wear had been taking place), and in a place near the inside rim of my 21 inch wheels. He said that I probably could make it home so I drove straight home. I called Tesla service and the Houston service center will be picking up my car on Tuesday to check out the issue. The wear that exists could have eventually resulted in a blow out so...I thought I would start this post to bring some safety to the table. I don't know what caused the wear on the inside wall of the tire or if the wear was caused by running with a low psi. The Model S has a warning system that alerts the driver of low tire pressure but I had received false low pressure warnings in the past. Tesla picked up my car (at their request) a few months ago to update some items and said that they corrected the low pressure warning issue. Within a few days of receiving my car from the service center I started getting the low tire warning again....so....I don't know if the tire had been run on low pressure for a long period of time or not. So my objective here is not to complain...but to warn other owners to check their tire pressures to ensure that they do not cause tire wear that could result in a potentially serious tire blow out. I hope that this post helps both Tesla and Tesla owners to achieve the maximum safety that the car can provide. I will keep everyone posted on the results of what is discovered by Tesla service. BTW....I absolutely love my Tesla Model S!!