Re: Pizza Cutters - what PSI for street?
Don't run my 34x10.5 LTBs everyday, but when on pavement on the way to the trails I put 45lbs in them. I tried them at 50lbs and 55lbs, but they just made the rig shimmy more. I get a weird balance issue when I run them that high, that seems to disappear when I run them at 45lbs. And believe me, it took lots of lead to balance this wheel/tire combo.
Depending on your tread pattern (and I think the SSR's and LTB's are similar enough) the goal is to put enough PSI in to get the sidewall lugs off the pavement. What mtbcoach and I do is put enough in to lift the side lugs off and run primarily on the center tread pattern which is a smoother, quieter ride. Also, with certain rubber compounds, you can tear off those side lugs under high speed turns.
I think you'll just have to do a your own empirical testing (trial and error) to find out what works best. Also if you are going to run them daily, then you will need to find a compromise between 1) even wear, 2) smoother ride and 3) balance.