I weigh 193. That bike is 21st least 32lbs and my back pack is around 25lbs depending on the season. I ran my suomi/Nokia studded snow tiress at 55psi on dry pavement, 35psi on ice and 15-25psi on snow but would have some dry stretches and for those 35 was too low with lots of extra effort and excessive bounce. 25psi and lower were horrible on dry pavement, but provided great stability and grip on the snow.

I am a podcast guy and will listen to your suggestion on this afternoons ride home....thanks! (one ear, curbside).