And just to be clear:
The tables are MINIMUMS, not recommendations.
Plus, inflation pressure doesn't have as much effect on wear as alignment or even position on the vehicle. In passenger cars, the steer tires wear in the shoulders and the drive tires wear in the center, at about the same rate.
That means that in passenger cars, tires on a RWD wear differently, but at the same rate, so tire rotation gets more miles out of a set.
In FWD, the steer tires and the drive tires are the same, so generally the wear is even, but more rapid than the rears. Tire rotation is so the tires wear out at the same time.
I suspect the same is true of trucks and buses, although you don't find many FWD trucks or buses.
