I've been running with 23/406 Schwalbe One's on the front wheels for some time now. I keep the pressure at 90psi (85psi being the minimum). It makes for a fast and reasonably comfortable ride. But these skinny tires when run at low pressure are susceptible to pinch flats (tire compressing against the rim pinching and cutting the tube). On the smooth roads of my old home town this wasn't a problem. Up here along the Central Coast abrupt road condition changes and the occasional unseen debris on the road is a bit of a problem when trying to avoid a hard hit on the wheel. Time to rethink tire options. Stay tuned.