I'm so confused! I have a friend's husband who has drilled into me that tires should be fully inflated. So I did that to trailer & truck. Twice I've put truck tires on & the installer under-inflated them (making the hauling significantly less secure). I asked Ford the other day & they said they inflate to the truck Mfr's recommendation (on the door jamb). These recommendations are significantly lower than the max tire pressure on the tire. How do I know what is best???
Posted 2012-03-11 7:48 PM (#141945 - in reply to #141943) Subject: RE: Tire Pressure
Expert
Posts: 3853 Location: Vermont
Originally written by 2HPfarm on 2012-03-11 7:12 PMI'm so confused! I have a friend's husband who has drilled into me that tires should be fully inflated. So I did that to trailer & truck. Twice I've put truck tires on & the installer under-inflated them (making the hauling significantly less secure). I asked Ford the other day & they said they inflate to the truck Mfr's recommendation (on the door jamb). These recommendations are significantly lower than the max tire pressure on the tire. How do I know what is best???
Well just remember FORD RECOMMENDED UNDERINFLATED TIRES for the EXPLORER!!! And we all know how that turned out...
Posted 2012-03-11 9:28 PM (#141953 - in reply to #141943) Subject: RE: Tire Pressure
Member
Posts: 17
Location: Loveland, OH
What else do you think Ford is going to tell you? Don't go by what we recommend?IMHO, trailer tires should always be inflated to the max pressure listed on their sidewall. For an ST tire, that is usually 50 psi. Some trailers have LT tires on them. In that case, go by what the sidewall says. Make sure you inflate them while cold to that max pressure.For the truck, I do what feels right. While towing, I usually just go with the max pressure. The major risk with over inflation is a reduced contact patch, but we load up heavy enough that that is usually not a problem. P rated tires I always go with 44 psi (I don't think any P rated tires they put on trucks are the 36 psi max type anymore). For LT tires, I'll start near the max and go down if it feels like the handling or traction are not ideal.For the truck tires, you don't NEED to air them up much higher than the pressure on the B pillar to meet the load rating of the truck. But as you stated, the handling and MPG are terrible at that pressure.Hope that helps.Tom
Tire Pressure
