I have a 2013 F150 Eco-SCrew 4x4 6.5' bed w/HD Payload & Max Tow Packages. My door sticker says 55 psi front & 60 psi rear for the E rated LT tires. This seems high while not towing anything.

If you have this combination on your truck what PSI are you running when not towing.

 

I always go with max pressure. 36 tires in the yard, all max. No, not harsh riding, not wearing more, none of that snake oilness.

 

Contrary to Platinum_Sean's recommendation (always go with max pressure) ...

For everyday, non-fleet, no heavy payload, etc. use - Would recommend that you stick with the PSI in the door jam label for the best tire wear.

And no ... 55/60PSI isn't uncommon nor too much for non-towing with the packages and tires that you have.

BTW ... Check the tire side wall for the maximum PSI.
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Checked tires....max rating is 80 psi w/a weight rating of 3195 lbs. per tire (cold).

 

Max tow/HD payload on my truck. 60 rear, 55 front. Towing or not.

80 max rating on my LT's.