The rear tires on the Tesla Roadster can last anywhere from 5K to 13K miles. I squeezed mine to right around 12K miles. A pair costs $731 after installation and tax. You can save maybe $50 by buying your tires on line and having them shipped. But that process takes a bit of time, does not save much money and increases your carbon footprint. The front and rear tires are actually different sizes. The rear tires wear out much faster. Reportedly, the front tires should last twice as long as the rear tires.