[jhall1957]

What the best cold pressure and what is optimal pressure when warm(aggressive street) for Michelin Pilot Sport 4S?

[ryo-]

I've always considered 35psi cold to be the standard. or if you wanna be exact, look at the door jamb and follow those guidelines. I have a tire inflator at home so I usually just run that when my tires are cold to 35psi. if you're stopping at a gas station in the middle of a road trip, then I can see it getting tricky. if you go to the tire pressures on your screen, it will tell you the recommended warm tire pressure as well.

[gp_solo2]

According to door sticker it is 38psi cold which will go to about 40-41 when hot.

[pantdino]

Contrary to the old days when manufacturers recommended low tire pressures (30-32psi) for a soft ride, now they want higher pressures for better fuel economy.

I've always used 36psi cold, but I also find that common dial type gauges can be 1-2 lbs off. So unless you are using a really good gauge, you don't really know what you are setting.