Tesla Service had to replace a front tire due to a screw puncture. The sidewall was dirty and tire has red and white marking in tread. Frankly, tire doesn't "look" new. Tesla says the dirt is due to residue on the machine that installs the tire and will wash off. On one hand I feel lucky it got resolved quickly, especially considering Tesla told me there was no local stock of 19" Continentals. Service seems to have produced this out of thin air and I don't want to make a federal case of it. But I'd like to know if tire is second hand and will ask SA tomorrow. Experienced opinions appreciated. Thanks!