proper inflation?

[Plati]

2014EL
New tires, installed a week ago. … light truck 10 ply rated tires
Cleaned up the wheels today and measured pressure. Good to verify still same after a week.
Running 44 psi @ 38 degrees F. I think they "look" properly inflated … any opinions?

 

[star-art]

44 psi cold? The placard on my truck says 35 psi cold. The most I ever ran in my Winter tires was 40.

 

[07navi]

2014EL
New tires, installed a week ago. … light truck 10 ply rated tires
Cleaned up the wheels today and measured pressure. Good to verify still same after a week.
Running 44 psi @ 38 degrees F. I think they "look" properly inflated … any opinions?
View attachment 34603

2014EL
New tires, installed a week ago. … light truck 10 ply rated tires
Cleaned up the wheels today and measured pressure. Good to verify still same after a week.
Running 44 psi @ 38 degrees F. I think they "look" properly inflated … any opinions?
View attachment 34603

You could run at 35 cold and raise a bunch for towing. E rated tires are 80 psi max, D rated are 65 max, and C are 50 max. All those tires are at their strongest at the max pressure but by no means do you have to run them there. I would recommend C or D rated for these trucks. My Excursion handles the best with E rated at 60 psi but it weighs 8,000 pounds.

 

[Plati]

44 psi cold? The placard on my truck says 35 psi cold. The most I ever ran in my Winter tires was 40.

passenger tires

 

[star-art]

Ah, gotcha.

 

[762mm]

I run mine at 35 PSI max. My previous Ford I'd run at about 32 PSI for 16 years.

The more pressure you put in tires, the harder it will be on suspension components. Whatever fuel you'll save by running high pressure will be pissed away every time you'll have to do a ball joint, strut or wheel bearing prematurely.

Now, I'm not too familiar with the skinny tires on large mags (never had them, never will), but I believe these will require higher pressures by default, as not to damage the rim on every pothole. These types of wheels really do a number on the suspension components, though... especially on a big & heavy truck.

 

[07navi]

I'm kinda' stuck between the looks of the 20" chrome wheels and the benefits of the small wheel/large tire. The excursion I came from ran large E rated tires and a 16" wheel with a straight front axle and f-250 frame at 8,000 pounds but this new to me 2007 Navigator still rides smoother even with the 20" wheels, and one size larger tires. I thought it was going to have rear air bags but they were either optional or the previous owner converted over to springs. That's still a mystery to me since I never met the owner (consignment car).

 

[Black]

When I bumped up my tire size and went to E rated tires I tested out a few pressures.

Offroad shop that mounted the tires suggested 50psi and that was too much. I then tried 40 psi and it was much to squishy on the twisty country roads, I have settled on 45psi on road and for the trails around here 35psi.

Had them on for almost a year and about 10k mikes with a rotation every 5k and they are wearing evenly.

 

[762mm]

I'm kinda' stuck between the looks of the 20" chrome wheels and the benefits of the small wheel/large tire. The excursion I came from ran large E rated tires and a 16" wheel with a straight front axle and f-250 frame at 8,000 pounds but this new to me 2007 Navigator still rides smoother even with the 20" wheels, and one size larger tires. I thought it was going to have rear air bags but they were either optional or the previous owner converted over to springs. That's still a mystery to me since I never met the owner (consignment car).

Stay away from air bags in suspension. Every Ford owner I've met who had them ended up either fixing the thing, converting it to spring (preferred solution) or trading in the vehicle. For whatever reason, they have a lot of problems. The air bags can fail and leak or the compressor fails. Both are big money to fix and are guaranteed to develop problems as they age. You can also damage the system if you jack up the vehicle and forget to manually turn off the compressor (there's an actual procedure for that).


As for tires, the bigger the tire, the better it is for your suspension. I bought a set of OEM F150 mags that run the stock 16" tires for $200 off a local farmer, through kijiji... it came with the mags, tires (worn) and center caps. The F150 was a 2004, but the bolt pattern and center hub dimensions are the same.

Here they are after clean up. I really like the old school look :

 

[07navi]

The expy, navi, and the f-100 share the same bolt pattern and offset. I found these chrome 20" Boss brand winter wheels off an older expy on craigslist a week before buying the navi for $60 total with centers and lug nuts.