My 4 month old 90D came with Goodyear Eagle Touring 245/45 R 19 tires. Three days ago, I picked up a nail dead center in the middle of the tread (no sidewall damage at all), and the tire has a slow leak (3-5 PSI loss overnight), so it's still driveable. I go to the local tire shop, and when the tech pulls the tire off the rim, he sees a layer of foam on the inside circumference of the tire. He's never seen this. The boss comes over to look, and says that due to the foam, he won't repair the nail hole. He does not know what the foam is for. Boss sends me to the Goodyear store down the street. Now it gets odd...The man behind the Goodyear counter cannot find this tire in the Goodyear web site. He calls various Goodyear numbers, and no one can find this exact tire anywhere in the Goodyear system! They won't/can't tell me if the tire can be repaired or not. While the agent is making still more calls to various Goodyear numbers, I call Tire Rack. The agent sees the tire in his system, but they are out of stock with no ETA for future deliveries. I call Tesla Scottsdale, and they have...1...in stock. I buy it, and it'll be shipped to me in Flagstaff middle of the week. I tell the Tesla service guy (who was very helpful) that it's odd that Tesla is shipping (almost) new cars with tires that can't be easily be replaced. What I I had been out on a the road, and the tire was totally unserviceable? He tells me that all new Teslas come with the foam lining in the tire for road noise reduction, and it could be that the tires are built by Goodyear to Tesla specs, and that could be why they don't generally show up in Goodyear or Tire Rack or Discount Tire inventory systems. Be aware that if you have Eagle Touring 245/45 R 19 tires, you will probably have trouble getting one replaced. I welcome any comments!