The question is whether the tires change as you ride. If they're squishier at the end, there's a problem

If my tires are squishy at all to my fingers, they're too low (by the tire gauge and how hard I have to work). That's prob'ly my fingers, though... but I know lots of other people who do seem to want the biek wheel to feel like a car wheel and they should be stiffer than that.