Originally Posted by Dollar Bill
I have 15" conti tires that have a max cold psi at 51. So how would 44 psi be over inflated or have less contact with the road?
Technically that's the maximum cold inflation pressure for the tire, but the specified pressure for the O.E. tire on the car per the vehicle manufacturer is the number they expect you to go by for over vs under inflation to the vehicle manufacturer's specification. So at 44 psig you're at least 9 psig over inflated if Ford specified a max cold inflation pressure of 35 psig for what they determined to be the best compromise of ride and handling. Now will the tire blow up at 44 psig if its rated to 51 psig cold with the margin for inflating a bit when heated up, not likely, but will it ride the same as it does at the vehicle manufacturer's set point? No, but is it dangerous, that depends on who you ask.