Thanks for all the info guys. Found a table and it looks like around 42-43psi for my 275/65/18 KO2's is about the same load rating as the stock 265/65/18 SRA's at the 35psi that the door sticker shows. I have aired them down to 43psi.
Just put on some BFG KO2 275/65/18 on my new Sierra All Terrain. The installer pumped them up to 50psi because they are E load rated. Seems a bit high to me. What psi are you guys running on your KO2's?
Thanks