I liked 27psi allright this summer for comfort reasons, although after the lift 27psi was pretty scary in corners.

Last winter and this winter I'm running at 45psi. A bit jittery over little bumps, but great for traction and cornering. 265s are a bit wide for snow, but the 45psi helps compensate for that.

I don't think all A/T KOs are D Load-rated, but those that are max out at 65psi, so no worries at 45psi.

-Daver