YAPT = Yet another pressure thread.

This question is about low tire pressure. My question is, why are tires are always rated for too high pressure?

I'm a skinny guy, I weight between 145 - 150 lbs and I'm 5'11". I currently ride on 32mm tires; and so according to most formulas online I should ride between 55 to 65 PSI, on 32mm (!!). Personnaly, I tried 65 - 70 and its bliss. I did 80+kms with this pressure and it feels great (used to ride @ 90-110PSI).

The problem is, all 32mm tires I find are rated for 75 or above *MIN* pressure..! I have what I feel are pretty good tires (Specialized Borough Armadillo Elite) and don't really want to change them, but I feel that if I continue running them low I'll scrap them (I now run them at 75 PSI just in case)

Anyway, it seems that to get to 65 PSI I need to go 35mm..

Am I being unreasonable? Should I just harden the f*** up?