I'm going from South Florida to New York next week. What would be the best tire pressure for the trip. I will have 4 people in the Ex plus our stuff. Not towing anything. I have the original tires and 21k on the Ex.

Thanks.

 

got the same truck...
You can bump the presure up to the max on the sidewall without issue except for the harshness of the ride you may get on secondary roads...
typically the interstate ride will be fine....

It saves a tiny bit on the mpg, but I think the best benefit I found was that I got 83k miles out of the original bfg rugged trails !!!

 

I'd say 60 including spare. That's probably overkill, but you could never be too careful on a 1400ish mile trip.

 

For long trips I like to use the maximum rating on the side walls.

I just did a 2700 mile trip from South Florida to Los Angeles and had my tires at 80psi and my air bags at 30psi. I had 5 people in the Ex and was towing my wifes Dodge Charger. The Ex did better than I could have imagined.

 

+ 1 . I like to up the pressure on a trip because it is just freeway driving and I can save gas.

 

I run 80 PSI at all 4 corners all of the time! It will help with mpg's and increase the life of the tires too!! Only run 80 if you have E-rated tires though!! These trucks are heavy and they ride fine with max PSI!!

 

Here's what a Cooper rep told me(after them giving me 2 sets of tires on wifes car)
1) Go with what door sticker say
2) If you load heavy(in truck), then can add 10% of (1)
3) Can go to Tire Max Pres if you load heavy and pull trailer, But not over Max Tire pres.
4) ** Take pres down back to Door sticker pres after heavy trip**

*** Just never below door sticker ***

 

I run 75psi at any given time all around on mine. Our roads up here suck, and it's still tolerable. Only problem is 4 of my air gauges only go up to 60psi... So I have to keep a special one just for that.

 

Good generic advice .....

should be said, all psi should be cold psi....
we all know there can be a lot of difference between cold and hot air pressure, right ?

Heck, I've even measured a big diff from the sunny side of the truck to the shaded side.... so take it all into account

 

I have Michelin LTX "E" rated tires on the X and ran the door rated 50/55 PSI for about 55,000 tire miles. I always put 80 PSI in when I towed.

I found the door rated 50/55 PSI caused more wear on the inside/outside of the tires then in the middle. Have been running 70 PSI since 55,000 tire miles and inside/outside wear has stopped. Now have 63,000 tire miles on the X and will probably get another 15,000 to 20,000 miles out of the tires. Best truck tires I have ever had. Michelins installed at 15,000 truck miles.

DSMMH

 

Agree, why I got 84k+ out of my original BFG's - I usually ran them @ a bit higher pi...

and why I still feel doing a search for the "Chalk Test" for tire pressure is the best way to know what YOUR combination 'likes' ..

 

I have heard of the chalk test - it's a good way to get the best contact patch down on the ground. Here's a slightly different way:

Weight of truck x Max tire PSI as indicated on sidewall
----------------------------------------------------
Tire max load rating (lbs) multiplied by 4


or:

7100lbs x 80psi
---------------
3415*4 = 13660

568000
------- = 41.6psi
13660

This supposedly gives you the best tread contact - but I certainly wouldn't run less than the door/gas label says. For best mileage and towing it seems like the max pressure is the best way - although with a firmer ride. The max load of the tire is calculated with the max pressure (cold) so keep that in mind for what ever you are towing/hauling.