tire pressure question

riven1950 wrote:
Just put Michelen lt tires on my 2013 f150 4x4 cc. Max pressure is 80 psi. E rated.

My question is what would be a good pressure to run when not towing or hauling? What do you folks do?

Ask ten folks and you will most likely get 11 different answers... ;)

This is a never ending topic with no real consensus...

My vote is to run them as high as you can stand (ride quality wise)

On my Sub LT265/75R16E's at 80 PSI on my Suburban because of the way
like to drive both empty, loaded and towing

On my Silverado 33/12.5R15LT load range C's, run sidewall max of 35 PSI
because that it the max rating...would like to run higher, but that
it the rating for those tires

Door jamb calls for 35 psi, based on original P rated tires, same size. ( 275/65/18 )

Seems 80psi is too much and 35psi is too little for normal driving.

Door label is for the OEM tire. A lower class tire to what you have
installed. So only applies to that lower class and that size tire
listed

Also, if you changed size and the rim width...these also factor into
the right PSI for the conditions

Also, is full 80 psi what you folks do for towing? Should front and back be different?

Towing a TT about 6000-6200lbs loaded with wd hitch/ sway.

thanks, bought tires at Ford dealer and they are not much help.

They have a liability issue on any NON-OEM tire listed on the door
label. So of course 'most' won't touch this topic

Tire pressure is not just for weight carry, but to keep the tire shape
during all of it's duties at max rated load. If below max rated load,
then slightly less pressure is needed

There are several way to help determine the PSI for the load.

The chalk method and the masking tape method. I use water/puddle
most times...and how the tire is wearing, but admit to not being much
of the herd type in anything to do automotive...drive much, much harder
than most and demand much, much higher performance levels than most