I repeat what Gasman said in a big way... spend the cash and get the tire insurance plan offered by the dealership. They replace the tires no questions asked. My last car the 330i had (9) NINE tires replaced with ZERO cost other than the $900 bucks I spent when I bought the car.
2008 M3 Sedan
Jet Black-Black Novillo Extended Leather, CL Trim
-Premium Package-Technology Package-19" Wheels
Yeah Bitch! That was a sedan that just passed you!