Fought flats and tire issues for the first week,20-30mi or so... I ONLY ride pavement and road shoulders. But the cheap tire of the original bike wouldn't even hold the bead on the rim regardless of varied tire pressure. Too low, and slipin' tube 'n pinch flats or cut stem. Too high, and lose the bead seat and blow the tube out. Two tires, three tubes,... ENOUGH!!! The last tire and tube has been on for 18moths, nearly a 1000mi with no more trouble.
The Big Apple calls for 30-55psi,.... I run 53psi with a quality Schwalbb tube and premium spoke band. Max psi for max weight load,... and I'm close to max. Got nice solid grip, no roll or give, firm control with no worries of road trash, chipped pavement, cheap spokes or anything else but the sandspurs that are thrown from the tire to my socks and pant leg! I'll live with that.