What can cause this wear

[flatbed94kid]

i have over 100,000 now on my steer tires. They look good still knock on wood.

What is the average lifespan of a steer tire or should be?

If you guys remember I did get an alignment at a T/A and I did adjust my steering wheel a

bit as my wheel was crooked. So far it is pretty decent rolling down the road.

Now yes my truck will drift pretty quickly if i were to let my hands off the wheel. Like 2 seconds.

So I still need to grasp this on exactly how to do this alignment. And how to properly measure those parts. I doubt I have anything worn out but just to be sure.

Also can anyone here clarify on how to read the decimal numbers when measuring?

I keep getting confused the more .00 or .000 etc.