Again, Teslas have nothing special about them when it comes to tire maintenance. The only change here is, because Teslas are pretty brutal in laying down power to the road, you will probably have to replace them sooner than expected. The stock 18” tires on a Model 3, for instance, may not last 25,000 miles. When the tread depth is below 4/32”, you should consider it. If it gets below 2/32”, you’ve become a road hazard. If you don’t have a tread depth measuring tool, just put a quarter into the tread. If the top of George Washington’s head is flush with the tread, that’s a good time to start thinking about new tires. If you see the entire head, please start shopping.