Got it, thanks for your replies!
Here is the door sticker:
https://goo.gl/45jwi3
Here is the inflation table on the sidewall of the current tires:
https://goo.gl/zLDD9E
And here is what the rear tires look like inflated to 55psi:
https://goo.gl/K7cfF9
My concern is the bulge that appears. Doesn't this increase heat and tire wear?
Would a load range D tire show less bulge when inflated to the recommended psi? After long drives I swear I can smell more "rubber off-ing" on the rear tires than on the front.
Thanks!
(Apparently I haven't learned the trick to posting pictures here yet. Those links are shortened url's to images in google drive.)