Steer tire wearing oddly (pictures in thread)

Take a picture for us of the complete tire size info. I can see …/75R22.5
Looking at the inflation charts you’re probably under inflated.
Technically 11,000 lbs maybe okay, but that’s stationary weight.
When you’re travelling down the road and you hit the brakes, when the truck dives it overloads the front tire.
Doesn’t seem like much but over 144,000 miles it adds up.
I’ve never gotten much over 85,000 miles on set back axle trucks.

 

For a single tire:
5780 lbs load at 100 psi
5980 lbs load at 105 psi
6175 lbs load at 110 psi ( max for G rated)
6375 lbs load at 115 psi
6610 lbs load at 120 psi (max for H rated, yours)
So at 100 psi you can put 5780x2 = 11,560 lbs on the front end.
Generally they recommend 10 psi over your actual weight rating for a margin of safety.

 

I have a 1991 379ln. With what I've been told about Betsy's history, I'm always concerned about bolts breaking during maintenance. Because of this, I haven't aligned my axles. I too get odd wear so I only roll on 10 steer tires. I can rotate more often so I feel I am getting the full life from the tires. Plus, if a steer takes a dump you can just r&r from one of the drive axles.

 

I've had loose wheel bearings scallop the outside shoulders like that on my little truck.

 

Maybe try a pair of Centramatic balancers on the front axle?