On my 2010 Ultra I run 40 psi solo, 45 psi with either luggage or a passenger and 50 with both a passenger and luggage.

I've found my bike rides very well at these pressures and will bottom with less pressure especially when loaded up with a passenger.

 

I'm a pretty big guy so I will run 40 -42 alone and 50 with my honey on the back. I still gotta watch the really big bikes, but whenever my lady is on the back, it's all about enjoying the ride anyway.

 

One thing I think some are missing with the new frame they changed the shocks. The max air pressure on the old shocks were 30 psi and the max on the new shocks is 50 psi. I run 28 - 30 psi solo in my 2010 Limited and 50 psi two up with full luggage for a trip.