Tire pressure parameters

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

GlennSullivan

Full Access Members
Joined
Jul 3, 2021
Posts
849
Reaction score
523
Location
Yorktown NY & Jupiter FL
And the most important thing Ugh stated is "...go weigh your vehicle per axle". And I'll add that if you are exceeding your GAWR (most likely rear), regardless of what the tires will or will not support, you are off the reservation from a brake and handling standpoint. These are light vehicles made for light towing. There are a lot of trailers out there that might advertise that they are within the tow capacity of your Expedition; but, once you load your vehicle with gas, luggage, people, dogs, cats, surf boards, etc., then hook up your two axle travel trailer full of gear, batteries, propane, etc.....you will be surprised how far over your rear GAWR you are. Personally, I've been right on the line with Boy Scouts and gear and NOTHING on the receiver. I hate to be a buzz kill....but, if you're doing a lot of towing of things other than small boats, and utility trailers...you need to step up to a Super Duty.
My days of towing a car to the track loaded with tools, spares and buddies are long over. But that was accomplished with a Diesel Excursion.

These days my trailer is a 1500lb aluminum Featherlight, with only my wife and a few suitcases onboard and 1 of 3 cars on the trailer - 3100lbs, 3400lbs and 4700lbs respectively.

Ive CAT Scaled with each car and the package with the 4700lb car was right at the rear axle limit, even though the total trailer weight was only 6250lb. The nice thing about car trailers is you can adjust the position of the car to get the tongue and axle weights where you want to be.

I definitely feel the difference when I’m towing the 3100lb car vs the 4700lb one and wonder what it feels like towing a 7,000lb travel trailer with a 10’ high face.
 

Ugh_J

Full Access Members
Joined
Jul 24, 2023
Posts
109
Reaction score
68
Location
Texas, USA
Great info. I've been thinking to get a scale to measure my trailer's tongue weight, but how do you "weigh your vehicle per axle"???
There are truck scales somewhere in your area that have per-axle readings.

As an example using Little Rock, Arkansas:
1738887327647.png
 

Left Coast Geek

Full Access Members
Joined
Aug 31, 2023
Posts
421
Reaction score
180
Location
Mid Left Coast
I checked a bunch of door stickers on various Expeditions when I was shopping... 22" wheels all said 39 PSI whether or not they were HD Tow, and 18" wheels all said 35 PSI whether or not they were HD tow. The vehicle GWR didn't change with HD tow (but the payload did change with options like 4x4 vs not) I wanted HD Tow specifically for the proper 4x4 transfer case with 4L and the locking rear axle, in case I ever get stuck. My trailer is under 5000 lbs, so the standard tow would have been sufficient.
 

tominwi

Well-Known Member
Joined
Dec 26, 2024
Posts
57
Reaction score
14
Location
Up North
There are truck scales somewhere in your area that have per-axle readings.

As an example using Little Rock, Arkansas:
Amazingly, I can find no scales near Green Bay WI using several search methods. I think I will inquire with my RV dealer and see what they have to say about this.
 

GlennSullivan

Full Access Members
Joined
Jul 3, 2021
Posts
849
Reaction score
523
Location
Yorktown NY & Jupiter FL
Awesome. No idea why it didn't show in my searches. Many thanks.

Looks like fun:

View attachment 83615

Wonder what it costs. Found a FAQ with $14 which is probs higher these days but still cheap enough huh.
I paid $12.50 in 2022 and $13.00 in 2023 in the southeast, so somewhere in the $14.00 range, certainly less than $15.00. Money very well spent
 
Top