Can't believe it gives that info on the tire. I ran a Nexen for 30K and am now runnning a BFG, 155/80-15. I run 45psi with no issues. It seems to sit a bit lower, but then again, my whole bike does too. Probably have 15K on it now.
I'm leaving for northern MN in a half hour and don't feel like laying on the ground now, but when i get to PIP, I'll look, if I remember. Try looking at the BFG website.
http://www.bfgoodrichtires.com/assets/bfg/content/images/tire-cutaways/highlights_0012_Radial_TA.jpg