Originally Posted by 998M

OctoberFast is coming up at Road America the BMWCC in August. I have been thinking about taking the X5M up to it for giggles. I think it would be a ton of fun on the track. I am concerned about tires and brakes. Tires are $500 a piece for the 215 wheels. And while the brake rotors are over 15" in diameter, the calipers and pads are completely inadequate for the hard braking at RA.