OK, so, on my "regular" ride and pickup truck, the tires indicate a max PSI of 35 pounds. AFAIK, we all keep them there, or consider the tire under-inflated - and that's a bad thing for tire wear, safety, and gas mileage.

So, my Crossfire's Michelins say 55 PSI is the max inflation pressure - yet we all keep them between 32 PSI and 38 PSI (factory recommends 32PSI, no?).

How come?

 

Go ahead and inflate them to 55psi, and eventually you will have your answer.
Let us know how you go.
P.S. Use the search function - your question has been recently discussed.

 

Read that sidewall a little closer - they usually state that the max pressure is also for maximum load which is usually well above the curb weight of the vehicle. So there is a maximum inflation pressure for the tire but a recommended inflation pressure for that tire on a specific vehicle.

If you have a credit card with a $10,000 limit does that mean you have to spend $10,000 every time you use it? I don't think so. (although I suspect my wife has a different take on that one)