Bike tires only inflate up to 30psi with foot pump My bike has sat over the winter, and the tires went flat.  I used my foot pump to inflate the tires (front and back) and both tires inflated to 30 psi.  I have shraeder valves.  The pump continued to working with the same amount of resistance, but the psi on both tires would not go above 30. I am assuming that since the tires did inflate up to 30 psi, the valve connected, air is getting into the tire, and the pin is not stuck. Maybe I am wrong. Hoping someone else has had this issue and can share the fix.
Update. There is no sound of air escaping anywhere. I left the pump connected to the valve over night, and the psi did not decrease. The Gauge on the pump goes up to 100psi.
I don't think it's likely that there's a problem with the valve or tube. You should check it with a separate pressure gauge and try a different pump.