Appropriate PSI when switching from stock tires to larger BFG KO2's?

Ok thanks

 

I emailed BF Goodrich yesterday to inquire as to the appropriate PSI I should be running on my 265/70/R17 KO2s. They said my PSI should be 45 in both front and rear.

Did you ever do a chalk test? I have the exact same wheels and tires as you and am battling over what PSI to use. I emailed BFG and they told me I should be using 45, which is the same answer they have given other TW users. Still sounds high to me, but what do I know.