Poll - New tires - what psi to run?

[R***A**N**G**E***R]

I just bought new tires today ( goodyear wrangler authorities ) 31-10.50-15

They cost $133.oo each and look very menacing, anyways I have for the last 6 years run bf goodrich all terrain ta ko's but decided to switch it up, I have always run 35 psi in all 4 tires UNLESS I have a heavy load like gravel or something then I bump them up to 50 psi. but always return back to exactly 35 psi,I have never had any wear issues running this amount of air and to ME seems to be a good OVERALL pressure for what I do.

I wanted to know what psi YOU run and your logic behind it, whether flawed or factual.

I am hoping these tires kick ass in the very near upcoming winter here in kansas.

Below is a pic of the tires I put on and a pic of the tires I took off, man I really ran those bfg's down to NOTHING, I figured they were getting dangerous so I bought new tires.

 

[Sasquatch_Ryda]

Anywhere from 32-35psi should be just peachy!

 

[kcm1582]

I run mine at 35 with pretty good results.

 

[badmts]

The BEST WAY to set your tire 's air pressure is to use the STATIC LOADED RADIUS - it is the height of the tire under load measured at the center of the wheel/hub-no air guage ,just an air hose and a ruler.This is different for every tire made and is NOT on the side of the tire ANYWHERE- it can be gotten from the tire mfg tech line or from books at the tire store if the salesman even knows where to look-Now that having been said I am a tiresalesman and I am too lazy to even check mine ,they were aired down to go wheelin a week ago and I just drove home on them like 15 PSI.I am so lazy!

 

[LearjetMinako]

I go by my rule. From my experience working on hundreds of tires, 32-36 PSI seems to be the best range for even wear. I run accordingly to the temperture outside. So if it 50*F in the winter, I run them at 35 PSI. If it is 50*F in the summer, I run them at 32 PSI. From there, I add 1 PSI for ever 10*F increase or minus 1 PSI for ever 10*F difference.

With oversized off-road tires, my rule no longer appilies as the load index of the tire is much more than whats rated for the vehicle. So for off-road tires, I usually minus 2 PSI off my PSI rule.

 

[lil_Blue_Ford]

I usually run between 30 and 45 psi on tires depending on what size and what it's on. My F-150 I usually have it around 45 just because it's a work truck that is often loaded down. My Ranger I often ran at 35 and adjust according to wear or what I was doing. If I was doing some hauling or a lot of highway I'd often air up some and in the winter I'd often drop it down to 30 because it seemed to grip better.

I've been told that one of the best ways is to put a chalk line on the tire and drive a short distance. If the center is worn clean but not the edges, you have too much air, if the edges of the line are worn clean but not the center, you're too low.

My choptop is the exception to the rule. It runs 12 psi rear and 15 psi front, even on the street. Of course, it also has old school 33" bias ply tires that I've started to think I could run without a valve core and still not be in trouble...

 

[The_Dealer]

i almost got some of those tires for my 00 ranger from walmart, but went with mastercraft courser m/t's instead. i would run about 35psi and check the wear pattern with tire chaulk

 

[Boggin]

after working at a service station for a year i run 35 on my ranger and 25 on my '79 bronco on 33s

 

[R***A**N**G**E***R]

after working at a service station for a year i run 35 on my ranger and 25 on my '79 bronco on 33s

Did you get shitty gas mileage always running 25?

 

[Boggin]

she had a 351modified,, good gas milage for that one was only about 8-10mpg, mine was around 7-8 but only because i stepped up a few tire sizes. she didnt see a big lot of road use anyways, just going to the cabin on weekends and trail ridin

 

[Mark_88]

I find that the higher the psi, the rougher the ride...was running my zuki at 23 because anything above that made it jump hitting potholes...the Ranger I run at 28...but I may increase that to 30 to see if it makes the gas mileage any better...

 

[adsm08]

35 ish should be good. Ford has done lots of research into this, and that is where the tires wear best.

Unless they happen to be load range E, then bump it up to about 40 for the stiffer side walls.

 

[strvger]

i do the math. e rated tires and i know the weight of my truck. get the max number off the sidewall, start calculating. had them on my tracker trail rig and ran at about 22psi. changed them over to my ranger and am running them at 30psi. decent ride, good gas mileage, very good tire wear, and i'm happy.
but that's just me.

 

[adsm08]

I just do my best to not put E rated tires on my Ranger. Too stiff.

 

[Shran]

I run about 5psi under whatever the sidewall says is the max inflation pressure. Which, depending on what vehicle I'm driving, is usually anywhere from 30-60