Hey Raj;
Do you really think a "Run Flat" tire would have a 50lb. recomended tire pressure?
I ran my SRT only this morning at 145mph. If you run these tires at that pressure at that speed for any length of time they get REALLY HOT. I run my tires depending on conditions from 34.5 -36.lbs pressure.
Sorry but your info is... Wrong.
But I have to say the 80%-85% and the Sub set ZxY minus W times this and that sounded good.
I can't run Z's on mine because I have run at 174mph and plan on 190mph this season...
Mike