Originally Posted by MAST4R

The problem seems to be that you went LTE over P. Usually people who complain use LTE tires (or grossly oversized tires on Jeeps).

Another possibility I read about in 4WD magazine is if your tires cool down and develop flat spots between the time you arrive at the shop and the time they get balanced. Then balancing accounts for the flat spots and you are back to vibrations on the highway. Again, the heavy weight/grossly oversized tires/very stiff sidewall tires are where that happens.

As for psi, to be on par with P-metric tires in terms of load capacity, LT tires must be run at very different pressures, normally 42-44 for a 4Runner. That almost nobody likes doing that is another story.

Here in the desert, I can see the LT argument and I might move to an LTC eventually (though I survive just fine on P). In the Midwest (or Northwest) I would not run an LT.