Originally Posted by turmic
Don't most tracks require you to run nitrogen in your tires if your planning on exceding 125 mph? Because nitrogen lowers the chance of a blow out due to heat expansion. That's what I've heard, just wondering if it's true.
No, running nitrogen is just a way to control your pressures, so that they remain more consistent over the course of a race. You need to purge the tires completely, then run only nitrogen for it to have any benefit.
Tire pressures rise with the heat that is created with the friction of turning, braking and accelerating, not top speed.