Recommended Tire Pressure

[North Run]

I just installed Falken Wild Peak A/T Trail tires. 235/75 R15's. Two wheel drive, local driving and commuting to the closest towns. I got a smoking deal on 5 new tires, but I had to install them myself. So far the mileage isn't appreciably better than the old 31x10.5R15's, but holy smokes, no tire noise :D. Now I know I have to replace the door seals, lol, I guess 37 years is past their prime use before date. 

What tire pressure is everyone using on these tires for pavement travel? 

The only real issue I have noticed, my speedometer seems to be within 1 kilometer per hour of accuracy, but the odometer is at least 6-8 kms under in a 60 mile trip. I dug out my old Garmin GPS out of storage as I had the hard mount on the dash anyway, lol. I think I may have changed out the speedometer gear when I upgraded to the 31x10.5's but that was way back in 2010 or 11? I forgot to use and install the GPS before changing out the tires, so I can't verify if the odometer was more or less accurate.

The door tag was illegible before I got the truck. 

[89 MJ]

This depends on a number of factors, but I’d start at 32psi. 

[fiatslug87]

I run mine at 35psi, but you should probably do a chalk test on them. 

[Ωhm]

Both of the above PSI numbers could be correct.

Confucius saying
Man with one tire pressure gauge will know his tire pressure but man with two tire pressure gauges will never know his tire pressure.  
 

[llhat]

on my 89 with 4x4,  i went from a goodyear wrangler GSA 30 x 9.5 x 15 to a 235/75-15 Falken Rubitrek

 

at least 35 in the front,   but with no load down to 30 in the back.

the gooeyyears had simply aged out (they were new takeoffs from a wrangler... they only had 20k miles on them,

but showed dry rot and cupping........  speeds over 60 were shake city.......... 

 

so far... the Rubitrek have been great......... smooth... and i can 75+ it now if needed....... heck I have been driving it more,

with increasing distances........  so far bout 45mile one way.....  helps when oil leaks are mitigated (reduced) and stuff is 'working'

[ratrapp]

i only run 30-32 in my 2wd with 235s.the trucks arent that heavy to begin with.alittle extra tire pressure is okay but people maxing out by whats on the sidewall can cause premature center tire wear.

[Pete M]

I run 28

[75sv1]

I have Wild Peaks on one of my XJs. Really like them. As the OP noted, OMG little to no road noise. I've run them about 7 years now. I do have a set for my Avalanche.  The H2s. Had the rims redone. Waiting. Suppose to be this week. Only know on Wild Peaks is mud traction.  They did OK for me, when wheeling in mud though.

       As for tire pressure, as said before a lot of variables. Also, modern tires can take a lot more pressure. I run mine about 36 psi. Especially when doing highway miles. Maybe a bit more. If snow, then I'd air down to say 32 psi. 

      I can't say much about MPG. I don't think I took a penalty. I am still tracking MPG on the Avalanche. I do have to runs with 20.5 and 21 MPG. Most would be happy with 18 MPG in an Avy. I did get 18.5 and 19.5 in my last long distance runs. I was down on tire PSI at 30 PSI compared to 36 PSI. Having issues with fillups on gas. Some pumps kick off with 2.5 gallons to go. 

     I haven't tested the Wild Peaks in snow yet. Seems weather has not cooperate on that.