Tire Pressure

I worked for a trucking company, a while back and the tire man would have the drive tires at the max preasure, he would walk around and check the depth of the tread across the face. If it is overinflated, it will be worn more in the middle, if it is under inflated it will be worn more on the edges.
I would inflate to the max on the drivers and steers, then with a depth gauge modify the fronts by the tire wear.

 

I always went 5 over p.s.i. 110 on all tires except in exreme hot weather. if you put 105 like most say on sidewall after a few cold nights, you will find pressure will drop. 110 & I never had a wear problem.

 

I have been doing alignments for years. Almost all the time I see irregular wear, river wear, cupping, I also find under inflated tires. I always recommend the rating that is one the sidewall of the tire. The guys with no tire wear issues keep their pressures up to the rated limit. No question here!

 

IMO, run the correct psi for the weight the tire carries and speed operated at. all tire mfgs publish inflation tables. I use Michelins tables and get great wear. if you dont check psi at least once a week your probably better off with max psi. kicking or thumping tire dosent count.

 

Idea is 105 and 95 on steers for wear. But with todays high cost of fuel it's cost effective to run 110 all the way around. That's what our college grad bowtie desk jockey fuelman expert tells us.

 

thats why I run 100 all around. just wait til the winter gets here. you can have 105 but when the temp dips to 15 20 degrees you'll check & you will find at least most of your former 105 psi will be 95 or so psi

 

Just go by what is stamped on the sidewall of the tire. If you see to much wear in the middle of the tire bring the pressure down by 5psi. If outsides are wearing too much add more pressure.

 

I try to inflate until they stop bulging but got scared at 135.